| Message ID | 1341606020-26449-1-git-send-email-fabio.estevam@freescale.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Jul 06, 2012 at 05:20:19PM -0300, Fabio Estevam wrote: > Cc: Theodore Ts'o <tytso@mit.edu> > Cc: Herbert Xu <herbert@gondor.apana.org.au> > Cc: <linux-kernel@vger.kernel.org> > Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> > --- > drivers/char/hw_random/mxc-rnga.c | 8 ++++---- > 1 files changed, 4 insertions(+), 4 deletions(-) > > diff --git a/drivers/char/hw_random/mxc-rnga.c b/drivers/char/hw_random/mxc-rnga.c > index 85074de..c49c0b8 100644 > --- a/drivers/char/hw_random/mxc-rnga.c > +++ b/drivers/char/hw_random/mxc-rnga.c > @@ -152,14 +152,14 @@ static int __init mxc_rnga_probe(struct platform_device *pdev) > if (rng_dev) > return -EBUSY; > > - clk = clk_get(&pdev->dev, "rng"); > + clk = clk_get(&pdev->dev, NULL); > if (IS_ERR(clk)) { > dev_err(&pdev->dev, "Could not get rng_clk!\n"); > err = PTR_ERR(clk); > goto out; > } > > - clk_enable(clk); > + clk_prepare_enable(clk); > > res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > if (!res) { > @@ -201,7 +201,7 @@ err_ioremap: > release_mem_region(res->start, resource_size(res)); > > err_region: > - clk_disable(clk); > + clk_disable_unprepare(clk); > clk_put(clk); > > out: > @@ -212,7 +212,7 @@ static int __exit mxc_rnga_remove(struct platform_device *pdev) > { > struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > void __iomem *rng_base = (void __iomem *)mxc_rnga.priv; > - struct clk *clk = clk_get(&pdev->dev, "rng"); > + struct clk *clk = clk_get(&pdev->dev, NULL); Uhh, that's a driver bug that should be fixed. Although right now there is no reference counting for clocks, the driver should keep the clk internally instead of simply calling clk_get whenever it needs access to a clk. Sascha
On Mon, Jul 9, 2012 at 4:41 AM, Sascha Hauer <s.hauer@pengutronix.de> wrote: > Uhh, that's a driver bug that should be fixed. Although right now there > is no reference counting for clocks, the driver should keep the clk > internally instead of simply calling clk_get whenever it needs access to > a clk. Yes, I just sent a fix for this.
diff --git a/drivers/char/hw_random/mxc-rnga.c b/drivers/char/hw_random/mxc-rnga.c index 85074de..c49c0b8 100644 --- a/drivers/char/hw_random/mxc-rnga.c +++ b/drivers/char/hw_random/mxc-rnga.c @@ -152,14 +152,14 @@ static int __init mxc_rnga_probe(struct platform_device *pdev) if (rng_dev) return -EBUSY; - clk = clk_get(&pdev->dev, "rng"); + clk = clk_get(&pdev->dev, NULL); if (IS_ERR(clk)) { dev_err(&pdev->dev, "Could not get rng_clk!\n"); err = PTR_ERR(clk); goto out; } - clk_enable(clk); + clk_prepare_enable(clk); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { @@ -201,7 +201,7 @@ err_ioremap: release_mem_region(res->start, resource_size(res)); err_region: - clk_disable(clk); + clk_disable_unprepare(clk); clk_put(clk); out: @@ -212,7 +212,7 @@ static int __exit mxc_rnga_remove(struct platform_device *pdev) { struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); void __iomem *rng_base = (void __iomem *)mxc_rnga.priv; - struct clk *clk = clk_get(&pdev->dev, "rng"); + struct clk *clk = clk_get(&pdev->dev, NULL); hwrng_unregister(&mxc_rnga);
Adapt clocks to the new i.mx clock framework and fix the following warning: ------------[ cut here ]------------ WARNING: at drivers/clk/clk.c:511 __clk_enable+0x9c/0xac() Modules linked in: Backtrace: [<800124c8>] (dump_backtrace+0x0/0x10c) from [<804172dc>] (dump_stack+0x18/0x1c) r7:00000009 r6:000001ff r5:8032cb50 r4:00000000 [<804172c4>] (dump_stack+0x0/0x1c) from [<80021834>] (warn_slowpath_common+0x54) [<800217e0>] (warn_slowpath_common+0x0/0x6c) from [<80021870>] (warn_slowpath_n) r9:80581cac r8:8700a9c0 r7:805ab070 r6:80000013 r5:806133d4 r4:8700a9c0 [<8002184c>] (warn_slowpath_null+0x0/0x2c) from [<8032cb50>] (__clk_enable+0x9c) [<8032cab4>] (__clk_enable+0x0/0xac) from [<8032cb88>] (clk_enable+0x28/0x44) r5:806133d4 r4:8700a9c0 [<8032cb60>] (clk_enable+0x0/0x44) from [<80560f14>] (mxc_rnga_probe+0x68/0x164) r7:805ab070 r6:8706ec00 r5:80611314 r4:00000000 [<80560eac>] (mxc_rnga_probe+0x0/0x164) from [<8025914c>] (platform_drv_probe+0) [<8025912c>] (platform_drv_probe+0x0/0x24) from [<80257c7c>] (driver_probe_devi) [<80257bfc>] (driver_probe_device+0x0/0x204) from [<80257e94>] (__driver_attach) r9:80581cac r8:0000008e r7:00000000 r6:8706ec3c r5:805ab070 r4:8706ec08 [<80257e00>] (__driver_attach+0x0/0x98) from [<8025642c>] (bus_for_each_dev+0x6) r7:00000000 r6:80257e00 r5:87035e98 r4:805ab070 [<802563c4>] (bus_for_each_dev+0x0/0x94) from [<80257adc>] (driver_attach+0x20/) r7:00000000 r6:873f2380 r5:805ab338 r4:805ab070 [<80257abc>] (driver_attach+0x0/0x28) from [<80256d50>] (bus_add_driver+0x18c/0) [<80256bc4>] (bus_add_driver+0x0/0x268) from [<802584c4>] (driver_register+0x80) [<80258444>] (driver_register+0x0/0x134) from [<802594f4>] (platform_driver_reg) r7:00000000 r6:805c2e00 r5:00000007 r4:805ab05c [<802594a8>] (platform_driver_register+0x0/0x60) from [<80259528>] (platform_dr) [<80259508>] (platform_driver_probe+0x0/0xa4) from [<80560ea0>] (mod_init+0x18/) r7:00000000 r6:805c2e00 r5:00000007 r4:87034000 [<80560e88>] (mod_init+0x0/0x24) from [<800086b4>] (do_one_initcall+0x40/0x194) [<80008674>] (do_one_initcall+0x0/0x194) from [<8053d3f4>] (kernel_init+0xfc/0x) [<8053d2f8>] (kernel_init+0x0/0x1cc) from [<80027190>] (do_exit+0x0/0x7ec) ---[ end trace 4198eed02050f461 ]--- mxc_rnga mxc_rnga: MXC RNGA Registered Cc: Theodore Ts'o <tytso@mit.edu> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: <linux-kernel@vger.kernel.org> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> --- drivers/char/hw_random/mxc-rnga.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-)