| Message ID | 1360970315-32116-1-git-send-email-dianders@chromium.org (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
On Fri, 15 Feb 2013 15:18:35 -0800, Doug Anderson wrote: > There is simply no reason to be manually setting the private driver > data to NULL in the remove/fail to probe cases. This is just extra > cruft code that can be removed. > > A few notes: > * Nothing relies on drvdata being set to NULL. > * The __device_release_driver() function eventually calls > dev_set_drvdata(dev, NULL) anyway, so there's no need to do it > twice. I had not noticed this change. Very good news! > * I verified that there were no cases where xxx_get_drvdata() was > being called in these drivers and checking for / relying on the NULL > return value. > > This could be cleaned up kernel-wide but for now just take the baby > step and remove from the i2c subsystem. > > Reported-by: Wolfram Sang <wsa@the-dreams.de> > Reported-by: Stephen Warren <swarren@wwwdotorg.org> > Signed-off-by: Doug Anderson <dianders@chromium.org> > --- > (...) For i2c-taos-evm: Reviewed-by: Jean Delvare <khali@linux-fr.org> Also a note: > --- a/drivers/i2c/busses/i2c-octeon.c > +++ b/drivers/i2c/busses/i2c-octeon.c > @@ -595,7 +595,7 @@ static int octeon_i2c_probe(struct platform_device *pdev) > result = i2c_add_adapter(&i2c->adap); > if (result < 0) { > dev_err(i2c->dev, "failed to add adapter\n"); > - goto fail_add; > + goto out; > } > dev_info(i2c->dev, "version %s\n", DRV_VERSION); > > @@ -603,8 +603,6 @@ static int octeon_i2c_probe(struct platform_device *pdev) > > return 0; > > -fail_add: > - platform_set_drvdata(pdev, NULL); > out: > return result; > }; There no longer is any point in this error path, all gotos in this function could be changed to returns (in a separate patch, obviously.)
>>>>> "Doug" == Doug Anderson <dianders@chromium.org> writes: Doug> There is simply no reason to be manually setting the private driver Doug> data to NULL in the remove/fail to probe cases. This is just extra Doug> cruft code that can be removed. Doug> A few notes: Doug> * Nothing relies on drvdata being set to NULL. Doug> * The __device_release_driver() function eventually calls Doug> dev_set_drvdata(dev, NULL) anyway, so there's no need to do it Doug> twice. Doug> * I verified that there were no cases where xxx_get_drvdata() was Doug> being called in these drivers and checking for / relying on the NULL Doug> return value. Doug> This could be cleaned up kernel-wide but for now just take the baby Doug> step and remove from the i2c subsystem. Doug> Reported-by: Wolfram Sang <wsa@the-dreams.de> Doug> Reported-by: Stephen Warren <swarren@wwwdotorg.org> Doug> Signed-off-by: Doug Anderson <dianders@chromium.org> For i2c-ocores.c + i2c-mux-gpio.c: Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
On Fri, Feb 15, 2013 at 03:18:35PM -0800, Doug Anderson wrote: > There is simply no reason to be manually setting the private driver > data to NULL in the remove/fail to probe cases. This is just extra > cruft code that can be removed. > > A few notes: > * Nothing relies on drvdata being set to NULL. > * The __device_release_driver() function eventually calls > dev_set_drvdata(dev, NULL) anyway, so there's no need to do it > twice. > * I verified that there were no cases where xxx_get_drvdata() was > being called in these drivers and checking for / relying on the NULL > return value. > > This could be cleaned up kernel-wide but for now just take the baby > step and remove from the i2c subsystem. > > Reported-by: Wolfram Sang <wsa@the-dreams.de> > Reported-by: Stephen Warren <swarren@wwwdotorg.org> > Signed-off-by: Doug Anderson <dianders@chromium.org> > --- > drivers/i2c/busses/i2c-au1550.c | 1 - > drivers/i2c/busses/i2c-bfin-twi.c | 2 -- > drivers/i2c/busses/i2c-cpm.c | 2 -- > drivers/i2c/busses/i2c-davinci.c | 2 -- > drivers/i2c/busses/i2c-designware-pcidrv.c | 2 -- > drivers/i2c/busses/i2c-designware-platdrv.c | 2 -- For i2c-designware-pcidrv.c and i2c-designware-platdrv.c: Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Dear Doug Anderson, > There is simply no reason to be manually setting the private driver > data to NULL in the remove/fail to probe cases. This is just extra > cruft code that can be removed. > > A few notes: > * Nothing relies on drvdata being set to NULL. > * The __device_release_driver() function eventually calls > dev_set_drvdata(dev, NULL) anyway, so there's no need to do it > twice. > * I verified that there were no cases where xxx_get_drvdata() was > being called in these drivers and checking for / relying on the NULL > return value. > > This could be cleaned up kernel-wide but for now just take the baby > step and remove from the i2c subsystem. > > Reported-by: Wolfram Sang <wsa@the-dreams.de> > Reported-by: Stephen Warren <swarren@wwwdotorg.org> > Signed-off-by: Doug Anderson <dianders@chromium.org> For > drivers/i2c/busses/i2c-mxs.c | 2 -- [...] > diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c > index 22d8ad3..120f246 100644 > --- a/drivers/i2c/busses/i2c-mxs.c > +++ b/drivers/i2c/busses/i2c-mxs.c > @@ -697,8 +697,6 @@ static int mxs_i2c_remove(struct platform_device *pdev) > > writel(MXS_I2C_CTRL0_SFTRST, i2c->regs + MXS_I2C_CTRL0_SET); > > - platform_set_drvdata(pdev, NULL); > - > return 0; > } [...] Add my: Reviewed-by: Marek Vasut <marex@denx.de>
On Fri, Feb 15, 2013 at 03:18:35PM -0800, Doug Anderson wrote: > There is simply no reason to be manually setting the private driver > data to NULL in the remove/fail to probe cases. This is just extra > cruft code that can be removed. > > A few notes: > * Nothing relies on drvdata being set to NULL. > * The __device_release_driver() function eventually calls > dev_set_drvdata(dev, NULL) anyway, so there's no need to do it > twice. > * I verified that there were no cases where xxx_get_drvdata() was > being called in these drivers and checking for / relying on the NULL > return value. > > This could be cleaned up kernel-wide but for now just take the baby > step and remove from the i2c subsystem. > > Reported-by: Wolfram Sang <wsa@the-dreams.de> > Reported-by: Stephen Warren <swarren@wwwdotorg.org> > Signed-off-by: Doug Anderson <dianders@chromium.org> Applied, thanks!
diff --git a/drivers/i2c/busses/i2c-au1550.c b/drivers/i2c/busses/i2c-au1550.c index b278298..b5b8923 100644 --- a/drivers/i2c/busses/i2c-au1550.c +++ b/drivers/i2c/busses/i2c-au1550.c @@ -376,7 +376,6 @@ static int i2c_au1550_remove(struct platform_device *pdev) { struct i2c_au1550_data *priv = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); i2c_del_adapter(&priv->adap); i2c_au1550_disable(priv); iounmap(priv->psc_base); diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c index 0cf780f..05080c4 100644 --- a/drivers/i2c/busses/i2c-bfin-twi.c +++ b/drivers/i2c/busses/i2c-bfin-twi.c @@ -724,8 +724,6 @@ static int i2c_bfin_twi_remove(struct platform_device *pdev) { struct bfin_twi_iface *iface = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - i2c_del_adapter(&(iface->adap)); free_irq(iface->irq, iface); peripheral_free_list((unsigned short *)pdev->dev.platform_data); diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c index 2e79c10..3823623 100644 --- a/drivers/i2c/busses/i2c-cpm.c +++ b/drivers/i2c/busses/i2c-cpm.c @@ -682,7 +682,6 @@ static int cpm_i2c_probe(struct platform_device *ofdev) out_shut: cpm_i2c_shutdown(cpm); out_free: - dev_set_drvdata(&ofdev->dev, NULL); kfree(cpm); return result; @@ -696,7 +695,6 @@ static int cpm_i2c_remove(struct platform_device *ofdev) cpm_i2c_shutdown(cpm); - dev_set_drvdata(&ofdev->dev, NULL); kfree(cpm); return 0; diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c index 6a0a553..7d1e590 100644 --- a/drivers/i2c/busses/i2c-davinci.c +++ b/drivers/i2c/busses/i2c-davinci.c @@ -755,7 +755,6 @@ err_mem_ioremap: clk_put(dev->clk); dev->clk = NULL; err_free_mem: - platform_set_drvdata(pdev, NULL); put_device(&pdev->dev); kfree(dev); err_release_region: @@ -771,7 +770,6 @@ static int davinci_i2c_remove(struct platform_device *pdev) i2c_davinci_cpufreq_deregister(dev); - platform_set_drvdata(pdev, NULL); i2c_del_adapter(&dev->adapter); put_device(&pdev->dev); diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index 6add851..7c5e383 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -319,7 +319,6 @@ err_free_irq: free_irq(pdev->irq, dev); err_iounmap: iounmap(dev->base); - pci_set_drvdata(pdev, NULL); put_device(&pdev->dev); kfree(dev); err_release_region: @@ -336,7 +335,6 @@ static void i2c_dw_pci_remove(struct pci_dev *pdev) pm_runtime_forbid(&pdev->dev); pm_runtime_get_noresume(&pdev->dev); - pci_set_drvdata(pdev, NULL); i2c_del_adapter(&dev->adapter); put_device(&pdev->dev); diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index d2a33e9..0ceb6e1 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -207,7 +207,6 @@ err_unuse_clocks: clk_put(dev->clk); dev->clk = NULL; err_free_mem: - platform_set_drvdata(pdev, NULL); put_device(&pdev->dev); kfree(dev); err_release_region: @@ -221,7 +220,6 @@ static int dw_i2c_remove(struct platform_device *pdev) struct dw_i2c_dev *dev = platform_get_drvdata(pdev); struct resource *mem; - platform_set_drvdata(pdev, NULL); pm_runtime_get_sync(&pdev->dev); i2c_del_adapter(&dev->adapter); diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c index 5e7886e..0f37529 100644 --- a/drivers/i2c/busses/i2c-eg20t.c +++ b/drivers/i2c/busses/i2c-eg20t.c @@ -869,8 +869,6 @@ static void pch_i2c_remove(struct pci_dev *pdev) for (i = 0; i < adap_info->ch_num; i++) adap_info->pch_data[i].pch_base_address = NULL; - pci_set_drvdata(pdev, NULL); - pci_release_regions(pdev); pci_disable_device(pdev); diff --git a/drivers/i2c/busses/i2c-highlander.c b/drivers/i2c/busses/i2c-highlander.c index 3351cc7..436b0f2 100644 --- a/drivers/i2c/busses/i2c-highlander.c +++ b/drivers/i2c/busses/i2c-highlander.c @@ -436,8 +436,6 @@ err_unmap: err: kfree(dev); - platform_set_drvdata(pdev, NULL); - return ret; } @@ -453,8 +451,6 @@ static int highlander_i2c_remove(struct platform_device *pdev) iounmap(dev->base); kfree(dev); - platform_set_drvdata(pdev, NULL); - return 0; } diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index b00c29d..38e13cd 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -1239,7 +1239,6 @@ static void i801_remove(struct pci_dev *dev) free_irq(dev->irq, priv); pci_release_region(dev, SMBBAR); - pci_set_drvdata(dev, NULL); kfree(priv); /* * do not call pci_disable_device(dev) since it can cause hard hangs on diff --git a/drivers/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c index 33a2abb..405a2e2 100644 --- a/drivers/i2c/busses/i2c-ibm_iic.c +++ b/drivers/i2c/busses/i2c-ibm_iic.c @@ -773,7 +773,6 @@ error_cleanup: if (dev->vaddr) iounmap(dev->vaddr); - dev_set_drvdata(&ofdev->dev, NULL); kfree(dev); return ret; } @@ -785,8 +784,6 @@ static int iic_remove(struct platform_device *ofdev) { struct ibm_iic_private *dev = dev_get_drvdata(&ofdev->dev); - dev_set_drvdata(&ofdev->dev, NULL); - i2c_del_adapter(&dev->adap); if (dev->irq) { diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index a71ece6..82f20c6 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -605,7 +605,6 @@ static int __exit i2c_imx_remove(struct platform_device *pdev) /* remove adapter */ dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n"); i2c_del_adapter(&i2c_imx->adapter); - platform_set_drvdata(pdev, NULL); /* setup chip registers to defaults */ writeb(0, i2c_imx->base + IMX_I2C_IADR); diff --git a/drivers/i2c/busses/i2c-intel-mid.c b/drivers/i2c/busses/i2c-intel-mid.c index de3736b..323fa01 100644 --- a/drivers/i2c/busses/i2c-intel-mid.c +++ b/drivers/i2c/busses/i2c-intel-mid.c @@ -1069,7 +1069,6 @@ static int intel_mid_i2c_probe(struct pci_dev *dev, fail3: free_irq(dev->irq, mrst); fail2: - pci_set_drvdata(dev, NULL); kfree(mrst); fail1: iounmap(base); @@ -1087,7 +1086,6 @@ static void intel_mid_i2c_remove(struct pci_dev *dev) dev_err(&dev->dev, "Failed to delete i2c adapter"); free_irq(dev->irq, mrst); - pci_set_drvdata(dev, NULL); iounmap(mrst->base); kfree(mrst); pci_release_region(dev, 0); diff --git a/drivers/i2c/busses/i2c-iop3xx.c b/drivers/i2c/busses/i2c-iop3xx.c index 2f99613..bc99333 100644 --- a/drivers/i2c/busses/i2c-iop3xx.c +++ b/drivers/i2c/busses/i2c-iop3xx.c @@ -415,8 +415,6 @@ iop3xx_i2c_remove(struct platform_device *pdev) kfree(adapter_data); kfree(padapter); - platform_set_drvdata(pdev, NULL); - return 0; } diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c index a69459e..5e705ee 100644 --- a/drivers/i2c/busses/i2c-mpc.c +++ b/drivers/i2c/busses/i2c-mpc.c @@ -696,7 +696,6 @@ static int fsl_i2c_probe(struct platform_device *op) return result; fail_add: - dev_set_drvdata(&op->dev, NULL); free_irq(i2c->irq, i2c); fail_request: irq_dispose_mapping(i2c->irq); @@ -711,7 +710,6 @@ static int fsl_i2c_remove(struct platform_device *op) struct mpc_i2c *i2c = dev_get_drvdata(&op->dev); i2c_del_adapter(&i2c->adap); - dev_set_drvdata(&op->dev, NULL); if (i2c->irq) free_irq(i2c->irq, i2c); diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c index 22d8ad3..120f246 100644 --- a/drivers/i2c/busses/i2c-mxs.c +++ b/drivers/i2c/busses/i2c-mxs.c @@ -697,8 +697,6 @@ static int mxs_i2c_remove(struct platform_device *pdev) writel(MXS_I2C_CTRL0_SFTRST, i2c->regs + MXS_I2C_CTRL0_SET); - platform_set_drvdata(pdev, NULL); - return 0; } diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index 5b1b194..650293f 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -1105,7 +1105,6 @@ static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) err_irq: iounmap(dev->virtbase); err_no_ioremap: - amba_set_drvdata(adev, NULL); kfree(dev); err_pinctrl: err_no_mem: @@ -1130,7 +1129,6 @@ static int nmk_i2c_remove(struct amba_device *adev) release_mem_region(res->start, resource_size(res)); clk_put(dev->clk); pm_runtime_disable(&adev->dev); - amba_set_drvdata(adev, NULL); kfree(dev); return 0; diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c index a337d08..45150e3 100644 --- a/drivers/i2c/busses/i2c-ocores.c +++ b/drivers/i2c/busses/i2c-ocores.c @@ -452,7 +452,6 @@ static int ocores_i2c_remove(struct platform_device *pdev) /* remove adapter & data */ i2c_del_adapter(&i2c->adap); - platform_set_drvdata(pdev, NULL); return 0; } diff --git a/drivers/i2c/busses/i2c-octeon.c b/drivers/i2c/busses/i2c-octeon.c index 484ca77..935585e 100644 --- a/drivers/i2c/busses/i2c-octeon.c +++ b/drivers/i2c/busses/i2c-octeon.c @@ -595,7 +595,7 @@ static int octeon_i2c_probe(struct platform_device *pdev) result = i2c_add_adapter(&i2c->adap); if (result < 0) { dev_err(i2c->dev, "failed to add adapter\n"); - goto fail_add; + goto out; } dev_info(i2c->dev, "version %s\n", DRV_VERSION); @@ -603,8 +603,6 @@ static int octeon_i2c_probe(struct platform_device *pdev) return 0; -fail_add: - platform_set_drvdata(pdev, NULL); out: return result; }; @@ -614,7 +612,6 @@ static int octeon_i2c_remove(struct platform_device *pdev) struct octeon_i2c *i2c = platform_get_drvdata(pdev); i2c_del_adapter(&i2c->adap); - platform_set_drvdata(pdev, NULL); return 0; }; diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index 3ee1886..e02f9e3 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -1260,7 +1260,6 @@ err_unuse_clocks: pm_runtime_put(dev->dev); pm_runtime_disable(&pdev->dev); err_free_mem: - platform_set_drvdata(pdev, NULL); return r; } @@ -1270,8 +1269,6 @@ static int omap_i2c_remove(struct platform_device *pdev) struct omap_i2c_dev *dev = platform_get_drvdata(pdev); int ret; - platform_set_drvdata(pdev, NULL); - i2c_del_adapter(&dev->adapter); ret = pm_runtime_get_sync(&pdev->dev); if (IS_ERR_VALUE(ret)) diff --git a/drivers/i2c/busses/i2c-pca-platform.c b/drivers/i2c/busses/i2c-pca-platform.c index a30d2f6..aa00df1 100644 --- a/drivers/i2c/busses/i2c-pca-platform.c +++ b/drivers/i2c/busses/i2c-pca-platform.c @@ -260,7 +260,6 @@ e_print: static int i2c_pca_pf_remove(struct platform_device *pdev) { struct i2c_pca_pf_data *i2c = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); i2c_del_adapter(&i2c->adap); diff --git a/drivers/i2c/busses/i2c-pmcmsp.c b/drivers/i2c/busses/i2c-pmcmsp.c index 083d68c..f6389e2 100644 --- a/drivers/i2c/busses/i2c-pmcmsp.c +++ b/drivers/i2c/busses/i2c-pmcmsp.c @@ -349,7 +349,6 @@ static int pmcmsptwi_probe(struct platform_device *pldev) return 0; ret_unmap: - platform_set_drvdata(pldev, NULL); if (pmcmsptwi_data.irq) { pmcmsptwi_writel(0, pmcmsptwi_data.iobase + MSP_TWI_INT_MSK_REG_OFFSET); @@ -374,7 +373,6 @@ static int pmcmsptwi_remove(struct platform_device *pldev) i2c_del_adapter(&pmcmsptwi_adapter); - platform_set_drvdata(pldev, NULL); if (pmcmsptwi_data.irq) { pmcmsptwi_writel(0, pmcmsptwi_data.iobase + MSP_TWI_INT_MSK_REG_OFFSET); diff --git a/drivers/i2c/busses/i2c-pnx.c b/drivers/i2c/busses/i2c-pnx.c index ce40970..5f39c6d 100644 --- a/drivers/i2c/busses/i2c-pnx.c +++ b/drivers/i2c/busses/i2c-pnx.c @@ -761,7 +761,6 @@ out_clkget: out_drvdata: kfree(alg_data); err_kzalloc: - platform_set_drvdata(pdev, NULL); return ret; } @@ -776,7 +775,6 @@ static int i2c_pnx_remove(struct platform_device *pdev) release_mem_region(alg_data->base, I2C_PNX_REGION_SIZE); clk_put(alg_data->clk); kfree(alg_data); - platform_set_drvdata(pdev, NULL); return 0; } diff --git a/drivers/i2c/busses/i2c-powermac.c b/drivers/i2c/busses/i2c-powermac.c index 0dd5b33..da54e67 100644 --- a/drivers/i2c/busses/i2c-powermac.c +++ b/drivers/i2c/busses/i2c-powermac.c @@ -221,7 +221,6 @@ static int i2c_powermac_remove(struct platform_device *dev) printk(KERN_WARNING "i2c-powermac.c: Failed to remove bus %s !\n", adapter->name); - platform_set_drvdata(dev, NULL); memset(adapter, 0, sizeof(*adapter)); return 0; diff --git a/drivers/i2c/busses/i2c-puv3.c b/drivers/i2c/busses/i2c-puv3.c index d7c512d..261d7db 100644 --- a/drivers/i2c/busses/i2c-puv3.c +++ b/drivers/i2c/busses/i2c-puv3.c @@ -223,7 +223,6 @@ static int puv3_i2c_probe(struct platform_device *pdev) return 0; fail_add_adapter: - platform_set_drvdata(pdev, NULL); kfree(adapter); fail_nomem: release_mem_region(mem->start, resource_size(mem)); @@ -245,7 +244,6 @@ static int puv3_i2c_remove(struct platform_device *pdev) } put_device(&pdev->dev); - platform_set_drvdata(pdev, NULL); mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); release_mem_region(mem->start, resource_size(mem)); diff --git a/drivers/i2c/busses/i2c-pxa-pci.c b/drivers/i2c/busses/i2c-pxa-pci.c index 3d49856..9639be8 100644 --- a/drivers/i2c/busses/i2c-pxa-pci.c +++ b/drivers/i2c/busses/i2c-pxa-pci.c @@ -128,7 +128,6 @@ static int ce4100_i2c_probe(struct pci_dev *dev, return 0; err_dev_add: - pci_set_drvdata(dev, NULL); kfree(sds); err_mem: pci_disable_device(dev); @@ -141,7 +140,6 @@ static void ce4100_i2c_remove(struct pci_dev *dev) unsigned int i; sds = pci_get_drvdata(dev); - pci_set_drvdata(dev, NULL); for (i = 0; i < ARRAY_SIZE(sds->pdev); i++) platform_device_unregister(sds->pdev[i]); diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index 1034d93..fec18a4 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -1219,8 +1219,6 @@ static int __exit i2c_pxa_remove(struct platform_device *dev) { struct pxa_i2c *i2c = platform_get_drvdata(dev); - platform_set_drvdata(dev, NULL); - i2c_del_adapter(&i2c->adap); if (!i2c->use_pio) free_irq(i2c->irq, i2c); diff --git a/drivers/i2c/busses/i2c-s6000.c b/drivers/i2c/busses/i2c-s6000.c index 0088364..7c1ca5a 100644 --- a/drivers/i2c/busses/i2c-s6000.c +++ b/drivers/i2c/busses/i2c-s6000.c @@ -365,7 +365,6 @@ static int s6i2c_remove(struct platform_device *pdev) { struct s6i2c_if *iface = platform_get_drvdata(pdev); i2c_wr16(iface, S6_I2C_ENABLE, 0); - platform_set_drvdata(pdev, NULL); i2c_del_adapter(&iface->adap); free_irq(iface->irq, iface); clk_disable(iface->clk); diff --git a/drivers/i2c/busses/i2c-sh7760.c b/drivers/i2c/busses/i2c-sh7760.c index 3a2253e..5351a2f 100644 --- a/drivers/i2c/busses/i2c-sh7760.c +++ b/drivers/i2c/busses/i2c-sh7760.c @@ -546,7 +546,6 @@ static int sh7760_i2c_remove(struct platform_device *pdev) release_resource(id->ioarea); kfree(id->ioarea); kfree(id); - platform_set_drvdata(pdev, NULL); return 0; } diff --git a/drivers/i2c/busses/i2c-stu300.c b/drivers/i2c/busses/i2c-stu300.c index 60195b5..0a6f941 100644 --- a/drivers/i2c/busses/i2c-stu300.c +++ b/drivers/i2c/busses/i2c-stu300.c @@ -975,7 +975,6 @@ stu300_remove(struct platform_device *pdev) i2c_del_adapter(&dev->adapter); /* Turn off everything */ stu300_wr8(0x00, dev->virtbase + I2C_CR); - platform_set_drvdata(pdev, NULL); return 0; } diff --git a/drivers/i2c/busses/i2c-taos-evm.c b/drivers/i2c/busses/i2c-taos-evm.c index 26c352a..6ffa56e0 100644 --- a/drivers/i2c/busses/i2c-taos-evm.c +++ b/drivers/i2c/busses/i2c-taos-evm.c @@ -271,7 +271,6 @@ static int taos_connect(struct serio *serio, struct serio_driver *drv) exit_close: serio_close(serio); exit_kfree: - serio_set_drvdata(serio, NULL); kfree(taos); exit: return err; @@ -285,7 +284,6 @@ static void taos_disconnect(struct serio *serio) i2c_unregister_device(taos->client); i2c_del_adapter(&taos->adapter); serio_close(serio); - serio_set_drvdata(serio, NULL); kfree(taos); dev_info(&serio->dev, "Disconnected from TAOS EVM\n"); diff --git a/drivers/i2c/busses/i2c-versatile.c b/drivers/i2c/busses/i2c-versatile.c index eec20db..f3a8790 100644 --- a/drivers/i2c/busses/i2c-versatile.c +++ b/drivers/i2c/busses/i2c-versatile.c @@ -125,8 +125,6 @@ static int i2c_versatile_remove(struct platform_device *dev) { struct i2c_versatile *i2c = platform_get_drvdata(dev); - platform_set_drvdata(dev, NULL); - i2c_del_adapter(&i2c->adap); return 0; } diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c index f042f6d..332c720 100644 --- a/drivers/i2c/busses/i2c-xiic.c +++ b/drivers/i2c/busses/i2c-xiic.c @@ -784,8 +784,6 @@ static int xiic_i2c_remove(struct platform_device *pdev) xiic_deinit(i2c); - platform_set_drvdata(pdev, NULL); - free_irq(platform_get_irq(pdev, 0), i2c); iounmap(i2c->base); diff --git a/drivers/i2c/busses/i2c-xlr.c b/drivers/i2c/busses/i2c-xlr.c index 93f029e..7945b05 100644 --- a/drivers/i2c/busses/i2c-xlr.c +++ b/drivers/i2c/busses/i2c-xlr.c @@ -256,7 +256,6 @@ static int xlr_i2c_remove(struct platform_device *pdev) priv = platform_get_drvdata(pdev); i2c_del_adapter(&priv->adap); - platform_set_drvdata(pdev, NULL); return 0; } diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c index 3862a95..2d1d2c5 100644 --- a/drivers/i2c/busses/scx200_acb.c +++ b/drivers/i2c/busses/scx200_acb.c @@ -542,7 +542,6 @@ static int scx200_remove(struct platform_device *pdev) struct scx200_acb_iface *iface; iface = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); scx200_cleanup_iface(iface); return 0; diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c index 9f50ef0..abc2e55a 100644 --- a/drivers/i2c/muxes/i2c-mux-gpio.c +++ b/drivers/i2c/muxes/i2c-mux-gpio.c @@ -250,7 +250,6 @@ static int i2c_mux_gpio_remove(struct platform_device *pdev) for (i = 0; i < mux->data.n_gpios; i++) gpio_free(mux->gpio_base + mux->data.gpios[i]); - platform_set_drvdata(pdev, NULL); i2c_put_adapter(mux->parent); return 0;
There is simply no reason to be manually setting the private driver data to NULL in the remove/fail to probe cases. This is just extra cruft code that can be removed. A few notes: * Nothing relies on drvdata being set to NULL. * The __device_release_driver() function eventually calls dev_set_drvdata(dev, NULL) anyway, so there's no need to do it twice. * I verified that there were no cases where xxx_get_drvdata() was being called in these drivers and checking for / relying on the NULL return value. This could be cleaned up kernel-wide but for now just take the baby step and remove from the i2c subsystem. Reported-by: Wolfram Sang <wsa@the-dreams.de> Reported-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Doug Anderson <dianders@chromium.org> --- drivers/i2c/busses/i2c-au1550.c | 1 - drivers/i2c/busses/i2c-bfin-twi.c | 2 -- drivers/i2c/busses/i2c-cpm.c | 2 -- drivers/i2c/busses/i2c-davinci.c | 2 -- drivers/i2c/busses/i2c-designware-pcidrv.c | 2 -- drivers/i2c/busses/i2c-designware-platdrv.c | 2 -- drivers/i2c/busses/i2c-eg20t.c | 2 -- drivers/i2c/busses/i2c-highlander.c | 4 ---- drivers/i2c/busses/i2c-i801.c | 1 - drivers/i2c/busses/i2c-ibm_iic.c | 3 --- drivers/i2c/busses/i2c-imx.c | 1 - drivers/i2c/busses/i2c-intel-mid.c | 2 -- drivers/i2c/busses/i2c-iop3xx.c | 2 -- drivers/i2c/busses/i2c-mpc.c | 2 -- drivers/i2c/busses/i2c-mxs.c | 2 -- drivers/i2c/busses/i2c-nomadik.c | 2 -- drivers/i2c/busses/i2c-ocores.c | 1 - drivers/i2c/busses/i2c-octeon.c | 5 +---- drivers/i2c/busses/i2c-omap.c | 3 --- drivers/i2c/busses/i2c-pca-platform.c | 1 - drivers/i2c/busses/i2c-pmcmsp.c | 2 -- drivers/i2c/busses/i2c-pnx.c | 2 -- drivers/i2c/busses/i2c-powermac.c | 1 - drivers/i2c/busses/i2c-puv3.c | 2 -- drivers/i2c/busses/i2c-pxa-pci.c | 2 -- drivers/i2c/busses/i2c-pxa.c | 2 -- drivers/i2c/busses/i2c-s6000.c | 1 - drivers/i2c/busses/i2c-sh7760.c | 1 - drivers/i2c/busses/i2c-stu300.c | 1 - drivers/i2c/busses/i2c-taos-evm.c | 2 -- drivers/i2c/busses/i2c-versatile.c | 2 -- drivers/i2c/busses/i2c-xiic.c | 2 -- drivers/i2c/busses/i2c-xlr.c | 1 - drivers/i2c/busses/scx200_acb.c | 1 - drivers/i2c/muxes/i2c-mux-gpio.c | 1 - 35 files changed, 1 insertion(+), 64 deletions(-)