| Message ID | 1356338031-23674-5-git-send-email-sachin.kamat@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
2012/12/24 Sachin Kamat <sachin.kamat@linaro.org> > This eliminates the need for explicit clk_put and makes the > cleanup and exit path code simpler. > > Cc: Eunchul Kim <chulspro.kim@samsung.com> > Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> > --- > drivers/gpu/drm/exynos/exynos_drm_fimc.c | 46 > ++++++----------------------- > 1 files changed, 10 insertions(+), 36 deletions(-) > > diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c > b/drivers/gpu/drm/exynos/exynos_drm_fimc.c > index 972aa70..c4006b8 100644 > --- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c > +++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c > @@ -1739,64 +1739,50 @@ static int __devinit fimc_probe(struct > platform_device *pdev) > platform_get_device_id(pdev)->driver_data; > > /* clock control */ > - ctx->sclk_fimc_clk = clk_get(dev, "sclk_fimc"); > + ctx->sclk_fimc_clk = devm_clk_get(dev, "sclk_fimc"); > if (IS_ERR(ctx->sclk_fimc_clk)) { > dev_err(dev, "failed to get src fimc clock.\n"); > return PTR_ERR(ctx->sclk_fimc_clk); > } > clk_enable(ctx->sclk_fimc_clk); > > - ctx->fimc_clk = clk_get(dev, "fimc"); > + ctx->fimc_clk = devm_clk_get(dev, "fimc"); > if (IS_ERR(ctx->fimc_clk)) { > dev_err(dev, "failed to get fimc clock.\n"); > clk_disable(ctx->sclk_fimc_clk); > - clk_put(ctx->sclk_fimc_clk); > return PTR_ERR(ctx->fimc_clk); > } > > - ctx->wb_clk = clk_get(dev, "pxl_async0"); > + ctx->wb_clk = devm_clk_get(dev, "pxl_async0"); > if (IS_ERR(ctx->wb_clk)) { > dev_err(dev, "failed to get writeback a clock.\n"); > clk_disable(ctx->sclk_fimc_clk); > - clk_put(ctx->sclk_fimc_clk); > - clk_put(ctx->fimc_clk); > return PTR_ERR(ctx->wb_clk); > } > > - ctx->wb_b_clk = clk_get(dev, "pxl_async1"); > + ctx->wb_b_clk = devm_clk_get(dev, "pxl_async1"); > if (IS_ERR(ctx->wb_b_clk)) { > dev_err(dev, "failed to get writeback b clock.\n"); > clk_disable(ctx->sclk_fimc_clk); > - clk_put(ctx->sclk_fimc_clk); > - clk_put(ctx->fimc_clk); > - clk_put(ctx->wb_clk); > return PTR_ERR(ctx->wb_b_clk); > } > > - parent_clk = clk_get(dev, ddata->parent_clk); > + parent_clk = devm_clk_get(dev, ddata->parent_clk); > > if (IS_ERR(parent_clk)) { > dev_err(dev, "failed to get parent clock.\n"); > clk_disable(ctx->sclk_fimc_clk); > - clk_put(ctx->sclk_fimc_clk); > - clk_put(ctx->fimc_clk); > - clk_put(ctx->wb_clk); > - clk_put(ctx->wb_b_clk); > return PTR_ERR(parent_clk); > } > > if (clk_set_parent(ctx->sclk_fimc_clk, parent_clk)) { > dev_err(dev, "failed to set parent.\n"); > - clk_put(parent_clk); > + devm_clk_put(dev, parent_clk); > remove the above call. is there any reason that devm_clk_put should be called here? > clk_disable(ctx->sclk_fimc_clk); > - clk_put(ctx->sclk_fimc_clk); > - clk_put(ctx->fimc_clk); > - clk_put(ctx->wb_clk); > - clk_put(ctx->wb_b_clk); > return -EINVAL; > } > > - clk_put(parent_clk); > + devm_clk_put(dev, parent_clk); > ditto. > clk_set_rate(ctx->sclk_fimc_clk, pdata->clk_rate); > > /* resource memory */ > @@ -1804,16 +1790,14 @@ static int __devinit fimc_probe(struct > platform_device *pdev) > ctx->regs = devm_request_and_ioremap(dev, ctx->regs_res); > if (!ctx->regs) { > dev_err(dev, "failed to map registers.\n"); > - ret = -ENXIO; > - goto err_clk; > + return -ENXIO; > } > > /* resource irq */ > res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); > if (!res) { > dev_err(dev, "failed to request irq resource.\n"); > - ret = -ENOENT; > - goto err_clk; > + return -ENOENT; > } > > ctx->irq = res->start; > @@ -1821,7 +1805,7 @@ static int __devinit fimc_probe(struct > platform_device *pdev) > IRQF_ONESHOT, "drm_fimc", ctx); > if (ret < 0) { > dev_err(dev, "failed to request irq.\n"); > - goto err_clk; > + return ret; > } > > /* context initailization */ > @@ -1867,11 +1851,6 @@ err_ippdrv_register: > pm_runtime_disable(dev); > err_get_irq: > free_irq(ctx->irq, ctx); > -err_clk: > - clk_put(ctx->sclk_fimc_clk); > - clk_put(ctx->fimc_clk); > - clk_put(ctx->wb_clk); > - clk_put(ctx->wb_b_clk); > > return ret; > } > @@ -1891,11 +1870,6 @@ static int __devexit fimc_remove(struct > platform_device *pdev) > > free_irq(ctx->irq, ctx); > > - clk_put(ctx->sclk_fimc_clk); > - clk_put(ctx->fimc_clk); > - clk_put(ctx->wb_clk); > - clk_put(ctx->wb_b_clk); > - > return 0; > } > > -- > 1.7.4.1 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/dri-devel >
On Wednesday, 26 December 2012, Inki Dae <inki.dae@samsung.com> wrote: > > > 2012/12/24 Sachin Kamat <sachin.kamat@linaro.org> >> >> This eliminates the need for explicit clk_put and makes the >> cleanup and exit path code simpler. >> >> Cc: Eunchul Kim <chulspro.kim@samsung.com> >> Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> >> --- >> drivers/gpu/drm/exynos/exynos_drm_fimc.c | 46 ++++++----------------------- >> 1 files changed, 10 insertions(+), 36 deletions(-) >> >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c b/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> index 972aa70..c4006b8 100644 >> --- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> +++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> @@ -1739,64 +1739,50 @@ static int __devinit fimc_probe(struct platform_device *pdev) >> platform_get_device_id(pdev)->driver_data; >> >> /* clock control */ >> - ctx->sclk_fimc_clk = clk_get(dev, "sclk_fimc"); >> + ctx->sclk_fimc_clk = devm_clk_get(dev, "sclk_fimc"); >> if (IS_ERR(ctx->sclk_fimc_clk)) { >> dev_err(dev, "failed to get src fimc clock.\n"); >> return PTR_ERR(ctx->sclk_fimc_clk); >> } >> clk_enable(ctx->sclk_fimc_clk); >> >> - ctx->fimc_clk = clk_get(dev, "fimc"); >> + ctx->fimc_clk = devm_clk_get(dev, "fimc"); >> if (IS_ERR(ctx->fimc_clk)) { >> dev_err(dev, "failed to get fimc clock.\n"); >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> return PTR_ERR(ctx->fimc_clk); >> } >> >> - ctx->wb_clk = clk_get(dev, "pxl_async0"); >> + ctx->wb_clk = devm_clk_get(dev, "pxl_async0"); >> if (IS_ERR(ctx->wb_clk)) { >> dev_err(dev, "failed to get writeback a clock.\n"); >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> return PTR_ERR(ctx->wb_clk); >> } >> >> - ctx->wb_b_clk = clk_get(dev, "pxl_async1"); >> + ctx->wb_b_clk = devm_clk_get(dev, "pxl_async1"); >> if (IS_ERR(ctx->wb_b_clk)) { >> dev_err(dev, "failed to get writeback b clock.\n"); >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> return PTR_ERR(ctx->wb_b_clk); >> } >> >> - parent_clk = clk_get(dev, ddata->parent_clk); >> + parent_clk = devm_clk_get(dev, ddata->parent_clk); >> >> if (IS_ERR(parent_clk)) { >> dev_err(dev, "failed to get parent clock.\n"); >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> - clk_put(ctx->wb_b_clk); >> return PTR_ERR(parent_clk); >> } >> >> if (clk_set_parent(ctx->sclk_fimc_clk, parent_clk)) { >> dev_err(dev, "failed to set parent.\n"); >> - clk_put(parent_clk); >> + devm_clk_put(dev, parent_clk); > > remove the above call. is there any reason that devm_clk_put should be called here? Devm resources are freed/released automatically only when the device detaches. In the above case the clock was released explicitly (for whatever reasons) earlier. Hence i have used devm call to keep the code logic same as i do not know the behavior if this clock is 'put' when the device detaches instead of here. > >> >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> - clk_put(ctx->wb_b_clk); >> return -EINVAL; >> } >> >> - clk_put(parent_clk); >> + devm_clk_put(dev, parent_clk); > > ditto. > >> >> clk_set_rate(ctx->sclk_fimc_clk, pdata->clk_rate); >> >> /* resource memory */ >> @@ -1804,16 +1790,14 @@ static int __devinit fimc_probe(struct platform_device *pdev) >> ctx->regs = devm_request_and_ioremap(dev, ctx->regs_res); >> if (!ctx->regs) { >> dev_err(dev, "failed to map registers.\n"); >> - ret = -ENXIO; >> - goto err_clk; >> + return -ENXIO; >> } >> >> /* resource irq */ >> res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); >> if (!res) { >> dev_err(dev, "failed to request irq resource.\n"); >> - ret = -ENOENT; >> - goto err_clk; >> + return -ENOENT; >> } >> >> ctx->irq = res->start; >> @@ -1821,7 +1805,7 @@ static int __devinit fimc_probe(struct platform_device *pdev) >> IRQF_ONESHOT, "drm_fimc", ctx); >> if (ret < 0) { >> dev_err(dev, "failed to request irq.\n"); >> - goto err_clk; >> + return ret; >> } >> >> /* context initailization */ >> @@ -1867,11 +1851,6 @@ err_ippdrv_register: >> pm_runtime_disable(dev); >> err_get_irq: >> free_irq(ctx->irq, ctx); >> -err_clk: >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> - clk_put(ctx->wb_b_clk); >> >> return ret; >> } >> @@ -1891,11 +1870,6 @@ static int __devexit fimc_remove(struct platform_device *pdev) >> >> free_irq(ctx->irq, ctx); >> >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> - clk_put(ctx->wb_b_clk); >> - >> return 0; >> } >> >> -- >> 1.7.4.1 >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/dri-devel > >
On Wednesday, 26 December 2012, Inki Dae <inki.dae@samsung.com> wrote: > > > 2012/12/24 Sachin Kamat <sachin.kamat@linaro.org> >> >> This eliminates the need for explicit clk_put and makes the >> cleanup and exit path code simpler. >> >> Cc: Eunchul Kim <chulspro.kim@samsung.com> >> Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> >> --- >> drivers/gpu/drm/exynos/exynos_drm_fimc.c | 46 ++++++----------------------- >> 1 files changed, 10 insertions(+), 36 deletions(-) >> >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c b/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> index 972aa70..c4006b8 100644 >> --- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> +++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> @@ -1739,64 +1739,50 @@ static int __devinit fimc_probe(struct platform_device *pdev) >> platform_get_device_id(pdev)->driver_data; >> >> /* clock control */ >> - ctx->sclk_fimc_clk = clk_get(dev, "sclk_fimc"); >> + ctx->sclk_fimc_clk = devm_clk_get(dev, "sclk_fimc"); >> if (IS_ERR(ctx->sclk_fimc_clk)) { >> dev_err(dev, "failed to get src fimc clock.\n"); >> return PTR_ERR(ctx->sclk_fimc_clk); >> } >> clk_enable(ctx->sclk_fimc_clk); >> >> - ctx->fimc_clk = clk_get(dev, "fimc"); >> + ctx->fimc_clk = devm_clk_get(dev, "fimc"); >> if (IS_ERR(ctx->fimc_clk)) { >> dev_err(dev, "failed to get fimc clock.\n"); >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> return PTR_ERR(ctx->fimc_clk); >> } >> >> - ctx->wb_clk = clk_get(dev, "pxl_async0"); >> + ctx->wb_clk = devm_clk_get(dev, "pxl_async0"); >> if (IS_ERR(ctx->wb_clk)) { >> dev_err(dev, "failed to get writeback a clock.\n"); >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> return PTR_ERR(ctx->wb_clk); >> } >> >> - ctx->wb_b_clk = clk_get(dev, "pxl_async1"); >> + ctx->wb_b_clk = devm_clk_get(dev, "pxl_async1"); >> if (IS_ERR(ctx->wb_b_clk)) { >> dev_err(dev, "failed to get writeback b clock.\n"); >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> return PTR_ERR(ctx->wb_b_clk); >> } >> >> - parent_clk = clk_get(dev, ddata->parent_clk); >> + parent_clk = devm_clk_get(dev, ddata->parent_clk); >> >> if (IS_ERR(parent_clk)) { >> dev_err(dev, "failed to get parent clock.\n"); >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> - clk_put(ctx->wb_b_clk); >> return PTR_ERR(parent_clk); >> } >> >> if (clk_set_parent(ctx->sclk_fimc_clk, parent_clk)) { >> dev_err(dev, "failed to set parent.\n"); >> - clk_put(parent_clk); >> + devm_clk_put(dev, parent_clk); > > remove the above call. is there any reason that devm_clk_put should be called here? Devm resources are freed/released automatically only when the device detaches. In the above case the clock was released explicitly (for whatever reasons) earlier. Hence i have used devm call to keep the code logic same as i do not know the behavior if this clock is 'put' when the device detaches instead of here. > >> >> clk_disable(ctx->sclk_fimc_clk); >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> - clk_put(ctx->wb_b_clk); >> return -EINVAL; >> } >> >> - clk_put(parent_clk); >> + devm_clk_put(dev, parent_clk); > > ditto. > >> >> clk_set_rate(ctx->sclk_fimc_clk, pdata->clk_rate); >> >> /* resource memory */ >> @@ -1804,16 +1790,14 @@ static int __devinit fimc_probe(struct platform_device *pdev) >> ctx->regs = devm_request_and_ioremap(dev, ctx->regs_res); >> if (!ctx->regs) { >> dev_err(dev, "failed to map registers.\n"); >> - ret = -ENXIO; >> - goto err_clk; >> + return -ENXIO; >> } >> >> /* resource irq */ >> res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); >> if (!res) { >> dev_err(dev, "failed to request irq resource.\n"); >> - ret = -ENOENT; >> - goto err_clk; >> + return -ENOENT; >> } >> >> ctx->irq = res->start; >> @@ -1821,7 +1805,7 @@ static int __devinit fimc_probe(struct platform_device *pdev) >> IRQF_ONESHOT, "drm_fimc", ctx); >> if (ret < 0) { >> dev_err(dev, "failed to request irq.\n"); >> - goto err_clk; >> + return ret; >> } >> >> /* context initailization */ >> @@ -1867,11 +1851,6 @@ err_ippdrv_register: >> pm_runtime_disable(dev); >> err_get_irq: >> free_irq(ctx->irq, ctx); >> -err_clk: >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> - clk_put(ctx->wb_b_clk); >> >> return ret; >> } >> @@ -1891,11 +1870,6 @@ static int __devexit fimc_remove(struct platform_device *pdev) >> >> free_irq(ctx->irq, ctx); >> >> - clk_put(ctx->sclk_fimc_clk); >> - clk_put(ctx->fimc_clk); >> - clk_put(ctx->wb_clk); >> - clk_put(ctx->wb_b_clk); >> - >> return 0; >> } >> >> -- >> 1.7.4.1 >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/dri-devel > >
2012/12/26 Sachin Kamat <sachin.kamat@linaro.org> > > > On Wednesday, 26 December 2012, Inki Dae <inki.dae@samsung.com> wrote: > > > > > > 2012/12/24 Sachin Kamat <sachin.kamat@linaro.org> > >> > >> This eliminates the need for explicit clk_put and makes the > >> cleanup and exit path code simpler. > >> > >> Cc: Eunchul Kim <chulspro.kim@samsung.com> > >> Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> > >> --- > >> drivers/gpu/drm/exynos/exynos_drm_fimc.c | 46 > ++++++----------------------- > >> 1 files changed, 10 insertions(+), 36 deletions(-) > >> > >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c > b/drivers/gpu/drm/exynos/exynos_drm_fimc.c > >> index 972aa70..c4006b8 100644 > >> --- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c > >> +++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c > >> @@ -1739,64 +1739,50 @@ static int __devinit fimc_probe(struct > platform_device *pdev) > >> platform_get_device_id(pdev)->driver_data; > >> > >> /* clock control */ > >> - ctx->sclk_fimc_clk = clk_get(dev, "sclk_fimc"); > >> + ctx->sclk_fimc_clk = devm_clk_get(dev, "sclk_fimc"); > >> if (IS_ERR(ctx->sclk_fimc_clk)) { > >> dev_err(dev, "failed to get src fimc clock.\n"); > >> return PTR_ERR(ctx->sclk_fimc_clk); > >> } > >> clk_enable(ctx->sclk_fimc_clk); > >> > >> - ctx->fimc_clk = clk_get(dev, "fimc"); > >> + ctx->fimc_clk = devm_clk_get(dev, "fimc"); > >> if (IS_ERR(ctx->fimc_clk)) { > >> dev_err(dev, "failed to get fimc clock.\n"); > >> clk_disable(ctx->sclk_fimc_clk); > >> - clk_put(ctx->sclk_fimc_clk); > >> return PTR_ERR(ctx->fimc_clk); > >> } > >> > >> - ctx->wb_clk = clk_get(dev, "pxl_async0"); > >> + ctx->wb_clk = devm_clk_get(dev, "pxl_async0"); > >> if (IS_ERR(ctx->wb_clk)) { > >> dev_err(dev, "failed to get writeback a clock.\n"); > >> clk_disable(ctx->sclk_fimc_clk); > >> - clk_put(ctx->sclk_fimc_clk); > >> - clk_put(ctx->fimc_clk); > >> return PTR_ERR(ctx->wb_clk); > >> } > >> > >> - ctx->wb_b_clk = clk_get(dev, "pxl_async1"); > >> + ctx->wb_b_clk = devm_clk_get(dev, "pxl_async1"); > >> if (IS_ERR(ctx->wb_b_clk)) { > >> dev_err(dev, "failed to get writeback b clock.\n"); > >> clk_disable(ctx->sclk_fimc_clk); > >> - clk_put(ctx->sclk_fimc_clk); > >> - clk_put(ctx->fimc_clk); > >> - clk_put(ctx->wb_clk); > >> return PTR_ERR(ctx->wb_b_clk); > >> } > >> > >> - parent_clk = clk_get(dev, ddata->parent_clk); > >> + parent_clk = devm_clk_get(dev, ddata->parent_clk); > >> > >> if (IS_ERR(parent_clk)) { > >> dev_err(dev, "failed to get parent clock.\n"); > >> clk_disable(ctx->sclk_fimc_clk); > >> - clk_put(ctx->sclk_fimc_clk); > >> - clk_put(ctx->fimc_clk); > >> - clk_put(ctx->wb_clk); > >> - clk_put(ctx->wb_b_clk); > >> return PTR_ERR(parent_clk); > >> } > >> > >> if (clk_set_parent(ctx->sclk_fimc_clk, parent_clk)) { > >> dev_err(dev, "failed to set parent.\n"); > >> - clk_put(parent_clk); > >> + devm_clk_put(dev, parent_clk); > > > > remove the above call. is there any reason that devm_clk_put should be > called here? > > Devm resources are freed/released automatically only when the device > detaches. In the above case the clock was released explicitly (for whatever > reasons) earlier. Hence i have used devm call to keep the code logic same > as i do not know the behavior if this clock is 'put' when the device > detaches instead of here. > > If probe is failed, devm resources are released by devres_release_all(). So that is unnecessary call. Remove it. > > > > >> > >> clk_disable(ctx->sclk_fimc_clk); > >> - clk_put(ctx->sclk_fimc_clk); > >> - clk_put(ctx->fimc_clk); > >> - clk_put(ctx->wb_clk); > >> - clk_put(ctx->wb_b_clk); > >> return -EINVAL; > >> } > >> > >> - clk_put(parent_clk); > >> + devm_clk_put(dev, parent_clk); > > > > ditto. > > > >> > >> clk_set_rate(ctx->sclk_fimc_clk, pdata->clk_rate); > >> > >> /* resource memory */ > >> @@ -1804,16 +1790,14 @@ static int __devinit fimc_probe(struct > platform_device *pdev) > >> ctx->regs = devm_request_and_ioremap(dev, ctx->regs_res); > >> if (!ctx->regs) { > >> dev_err(dev, "failed to map registers.\n"); > >> - ret = -ENXIO; > >> - goto err_clk; > >> + return -ENXIO; > >> } > >> > >> /* resource irq */ > >> res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); > >> if (!res) { > >> dev_err(dev, "failed to request irq resource.\n"); > >> - ret = -ENOENT; > >> - goto err_clk; > >> + return -ENOENT; > >> } > >> > >> ctx->irq = res->start; > >> @@ -1821,7 +1805,7 @@ static int __devinit fimc_probe(struct > platform_device *pdev) > >> IRQF_ONESHOT, "drm_fimc", ctx); > >> if (ret < 0) { > >> dev_err(dev, "failed to request irq.\n"); > >> - goto err_clk; > >> + return ret; > >> } > >> > >> /* context initailization */ > >> @@ -1867,11 +1851,6 @@ err_ippdrv_register: > >> pm_runtime_disable(dev); > >> err_get_irq: > >> free_irq(ctx->irq, ctx); > >> -err_clk: > >> - clk_put(ctx->sclk_fimc_clk); > >> - clk_put(ctx->fimc_clk); > >> - clk_put(ctx->wb_clk); > >> - clk_put(ctx->wb_b_clk); > >> > >> return ret; > >> } > >> @@ -1891,11 +1870,6 @@ static int __devexit fimc_remove(struct > platform_device *pdev) > >> > >> free_irq(ctx->irq, ctx); > >> > >> - clk_put(ctx->sclk_fimc_clk); > >> - clk_put(ctx->fimc_clk); > >> - clk_put(ctx->wb_clk); > >> - clk_put(ctx->wb_b_clk); > >> - > >> return 0; > >> } > >> > >> -- > >> 1.7.4.1 > >> > >> _______________________________________________ > >> dri-devel mailing list > >> dri-devel@lists.freedesktop.org > >> http://lists.freedesktop.org/mailman/listinfo/dri-devel > > > > > > -- > With warm regards, > Sachin > > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/dri-devel > >
On 27 December 2012 15:43, Inki Dae <inki.dae@samsung.com> wrote: > > > 2012/12/26 Sachin Kamat <sachin.kamat@linaro.org> >> >> >> >> On Wednesday, 26 December 2012, Inki Dae <inki.dae@samsung.com> wrote: >> > >> > >> > 2012/12/24 Sachin Kamat <sachin.kamat@linaro.org> >> >> >> >> This eliminates the need for explicit clk_put and makes the >> >> cleanup and exit path code simpler. >> >> >> >> Cc: Eunchul Kim <chulspro.kim@samsung.com> >> >> Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> >> >> --- >> >> drivers/gpu/drm/exynos/exynos_drm_fimc.c | 46 >> >> ++++++----------------------- >> >> 1 files changed, 10 insertions(+), 36 deletions(-) >> >> >> >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> >> b/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> >> index 972aa70..c4006b8 100644 >> >> --- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> >> +++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c >> >> @@ -1739,64 +1739,50 @@ static int __devinit fimc_probe(struct >> >> platform_device *pdev) >> >> platform_get_device_id(pdev)->driver_data; >> >> >> >> /* clock control */ >> >> - ctx->sclk_fimc_clk = clk_get(dev, "sclk_fimc"); >> >> + ctx->sclk_fimc_clk = devm_clk_get(dev, "sclk_fimc"); >> >> if (IS_ERR(ctx->sclk_fimc_clk)) { >> >> dev_err(dev, "failed to get src fimc clock.\n"); >> >> return PTR_ERR(ctx->sclk_fimc_clk); >> >> } >> >> clk_enable(ctx->sclk_fimc_clk); >> >> >> >> - ctx->fimc_clk = clk_get(dev, "fimc"); >> >> + ctx->fimc_clk = devm_clk_get(dev, "fimc"); >> >> if (IS_ERR(ctx->fimc_clk)) { >> >> dev_err(dev, "failed to get fimc clock.\n"); >> >> clk_disable(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->sclk_fimc_clk); >> >> return PTR_ERR(ctx->fimc_clk); >> >> } >> >> >> >> - ctx->wb_clk = clk_get(dev, "pxl_async0"); >> >> + ctx->wb_clk = devm_clk_get(dev, "pxl_async0"); >> >> if (IS_ERR(ctx->wb_clk)) { >> >> dev_err(dev, "failed to get writeback a clock.\n"); >> >> clk_disable(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->fimc_clk); >> >> return PTR_ERR(ctx->wb_clk); >> >> } >> >> >> >> - ctx->wb_b_clk = clk_get(dev, "pxl_async1"); >> >> + ctx->wb_b_clk = devm_clk_get(dev, "pxl_async1"); >> >> if (IS_ERR(ctx->wb_b_clk)) { >> >> dev_err(dev, "failed to get writeback b clock.\n"); >> >> clk_disable(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->fimc_clk); >> >> - clk_put(ctx->wb_clk); >> >> return PTR_ERR(ctx->wb_b_clk); >> >> } >> >> >> >> - parent_clk = clk_get(dev, ddata->parent_clk); >> >> + parent_clk = devm_clk_get(dev, ddata->parent_clk); >> >> >> >> if (IS_ERR(parent_clk)) { >> >> dev_err(dev, "failed to get parent clock.\n"); >> >> clk_disable(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->fimc_clk); >> >> - clk_put(ctx->wb_clk); >> >> - clk_put(ctx->wb_b_clk); >> >> return PTR_ERR(parent_clk); >> >> } >> >> >> >> if (clk_set_parent(ctx->sclk_fimc_clk, parent_clk)) { >> >> dev_err(dev, "failed to set parent.\n"); >> >> - clk_put(parent_clk); >> >> + devm_clk_put(dev, parent_clk); >> > >> > remove the above call. is there any reason that devm_clk_put should be >> > called here? >> >> Devm resources are freed/released automatically only when the device >> detaches. In the above case the clock was released explicitly (for whatever >> reasons) earlier. Hence i have used devm call to keep the code logic same as >> i do not know the behavior if this clock is 'put' when the device detaches >> instead of here. >> > > If probe is failed, devm resources are released by devres_release_all(). So > that is unnecessary call. Remove it. In this case you are right. It is not required. I will remove it. But in the below case it is not part of cleanup, so I will keep it. What is your opinion about it? > >> >> >> > >> >> >> >> clk_disable(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->fimc_clk); >> >> - clk_put(ctx->wb_clk); >> >> - clk_put(ctx->wb_b_clk); >> >> return -EINVAL; >> >> } >> >> >> >> - clk_put(parent_clk); >> >> + devm_clk_put(dev, parent_clk); >> > >> > ditto. >> > >> >> >> >> clk_set_rate(ctx->sclk_fimc_clk, pdata->clk_rate); >> >> >> >> /* resource memory */ >> >> @@ -1804,16 +1790,14 @@ static int __devinit fimc_probe(struct >> >> platform_device *pdev) >> >> ctx->regs = devm_request_and_ioremap(dev, ctx->regs_res); >> >> if (!ctx->regs) { >> >> dev_err(dev, "failed to map registers.\n"); >> >> - ret = -ENXIO; >> >> - goto err_clk; >> >> + return -ENXIO; >> >> } >> >> >> >> /* resource irq */ >> >> res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); >> >> if (!res) { >> >> dev_err(dev, "failed to request irq resource.\n"); >> >> - ret = -ENOENT; >> >> - goto err_clk; >> >> + return -ENOENT; >> >> } >> >> >> >> ctx->irq = res->start; >> >> @@ -1821,7 +1805,7 @@ static int __devinit fimc_probe(struct >> >> platform_device *pdev) >> >> IRQF_ONESHOT, "drm_fimc", ctx); >> >> if (ret < 0) { >> >> dev_err(dev, "failed to request irq.\n"); >> >> - goto err_clk; >> >> + return ret; >> >> } >> >> >> >> /* context initailization */ >> >> @@ -1867,11 +1851,6 @@ err_ippdrv_register: >> >> pm_runtime_disable(dev); >> >> err_get_irq: >> >> free_irq(ctx->irq, ctx); >> >> -err_clk: >> >> - clk_put(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->fimc_clk); >> >> - clk_put(ctx->wb_clk); >> >> - clk_put(ctx->wb_b_clk); >> >> >> >> return ret; >> >> } >> >> @@ -1891,11 +1870,6 @@ static int __devexit fimc_remove(struct >> >> platform_device *pdev) >> >> >> >> free_irq(ctx->irq, ctx); >> >> >> >> - clk_put(ctx->sclk_fimc_clk); >> >> - clk_put(ctx->fimc_clk); >> >> - clk_put(ctx->wb_clk); >> >> - clk_put(ctx->wb_b_clk); >> >> - >> >> return 0; >> >> } >> >> >> >> -- >> >> 1.7.4.1 >> >> >> >> _______________________________________________ >> >> dri-devel mailing list >> >> dri-devel@lists.freedesktop.org >> >> http://lists.freedesktop.org/mailman/listinfo/dri-devel >> > >> > >> >> -- >> With warm regards, >> Sachin >> >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/dri-devel >> >
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c b/drivers/gpu/drm/exynos/exynos_drm_fimc.c index 972aa70..c4006b8 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c @@ -1739,64 +1739,50 @@ static int __devinit fimc_probe(struct platform_device *pdev) platform_get_device_id(pdev)->driver_data; /* clock control */ - ctx->sclk_fimc_clk = clk_get(dev, "sclk_fimc"); + ctx->sclk_fimc_clk = devm_clk_get(dev, "sclk_fimc"); if (IS_ERR(ctx->sclk_fimc_clk)) { dev_err(dev, "failed to get src fimc clock.\n"); return PTR_ERR(ctx->sclk_fimc_clk); } clk_enable(ctx->sclk_fimc_clk); - ctx->fimc_clk = clk_get(dev, "fimc"); + ctx->fimc_clk = devm_clk_get(dev, "fimc"); if (IS_ERR(ctx->fimc_clk)) { dev_err(dev, "failed to get fimc clock.\n"); clk_disable(ctx->sclk_fimc_clk); - clk_put(ctx->sclk_fimc_clk); return PTR_ERR(ctx->fimc_clk); } - ctx->wb_clk = clk_get(dev, "pxl_async0"); + ctx->wb_clk = devm_clk_get(dev, "pxl_async0"); if (IS_ERR(ctx->wb_clk)) { dev_err(dev, "failed to get writeback a clock.\n"); clk_disable(ctx->sclk_fimc_clk); - clk_put(ctx->sclk_fimc_clk); - clk_put(ctx->fimc_clk); return PTR_ERR(ctx->wb_clk); } - ctx->wb_b_clk = clk_get(dev, "pxl_async1"); + ctx->wb_b_clk = devm_clk_get(dev, "pxl_async1"); if (IS_ERR(ctx->wb_b_clk)) { dev_err(dev, "failed to get writeback b clock.\n"); clk_disable(ctx->sclk_fimc_clk); - clk_put(ctx->sclk_fimc_clk); - clk_put(ctx->fimc_clk); - clk_put(ctx->wb_clk); return PTR_ERR(ctx->wb_b_clk); } - parent_clk = clk_get(dev, ddata->parent_clk); + parent_clk = devm_clk_get(dev, ddata->parent_clk); if (IS_ERR(parent_clk)) { dev_err(dev, "failed to get parent clock.\n"); clk_disable(ctx->sclk_fimc_clk); - clk_put(ctx->sclk_fimc_clk); - clk_put(ctx->fimc_clk); - clk_put(ctx->wb_clk); - clk_put(ctx->wb_b_clk); return PTR_ERR(parent_clk); } if (clk_set_parent(ctx->sclk_fimc_clk, parent_clk)) { dev_err(dev, "failed to set parent.\n"); - clk_put(parent_clk); + devm_clk_put(dev, parent_clk); clk_disable(ctx->sclk_fimc_clk); - clk_put(ctx->sclk_fimc_clk); - clk_put(ctx->fimc_clk); - clk_put(ctx->wb_clk); - clk_put(ctx->wb_b_clk); return -EINVAL; } - clk_put(parent_clk); + devm_clk_put(dev, parent_clk); clk_set_rate(ctx->sclk_fimc_clk, pdata->clk_rate); /* resource memory */ @@ -1804,16 +1790,14 @@ static int __devinit fimc_probe(struct platform_device *pdev) ctx->regs = devm_request_and_ioremap(dev, ctx->regs_res); if (!ctx->regs) { dev_err(dev, "failed to map registers.\n"); - ret = -ENXIO; - goto err_clk; + return -ENXIO; } /* resource irq */ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!res) { dev_err(dev, "failed to request irq resource.\n"); - ret = -ENOENT; - goto err_clk; + return -ENOENT; } ctx->irq = res->start; @@ -1821,7 +1805,7 @@ static int __devinit fimc_probe(struct platform_device *pdev) IRQF_ONESHOT, "drm_fimc", ctx); if (ret < 0) { dev_err(dev, "failed to request irq.\n"); - goto err_clk; + return ret; } /* context initailization */ @@ -1867,11 +1851,6 @@ err_ippdrv_register: pm_runtime_disable(dev); err_get_irq: free_irq(ctx->irq, ctx); -err_clk: - clk_put(ctx->sclk_fimc_clk); - clk_put(ctx->fimc_clk); - clk_put(ctx->wb_clk); - clk_put(ctx->wb_b_clk); return ret; } @@ -1891,11 +1870,6 @@ static int __devexit fimc_remove(struct platform_device *pdev) free_irq(ctx->irq, ctx); - clk_put(ctx->sclk_fimc_clk); - clk_put(ctx->fimc_clk); - clk_put(ctx->wb_clk); - clk_put(ctx->wb_b_clk); - return 0; }
This eliminates the need for explicit clk_put and makes the cleanup and exit path code simpler. Cc: Eunchul Kim <chulspro.kim@samsung.com> Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> --- drivers/gpu/drm/exynos/exynos_drm_fimc.c | 46 ++++++----------------------- 1 files changed, 10 insertions(+), 36 deletions(-)