From: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
To: Sachin Kamat <sachin.kamat-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Naveen Krishna Chatradhi
<ch.naveen-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Subject: Re: [PATCH 1/1] i2c: exynos5: Remove incorrect clk_disable_unprepare
Date: Thu, 14 Nov 2013 18:19:13 +0100 [thread overview]
Message-ID: <20131114171913.GC11022@katana> (raw)
In-Reply-To: <1383730758-1771-1-git-send-email-sachin.kamat-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
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On Wed, Nov 06, 2013 at 03:09:18PM +0530, Sachin Kamat wrote:
> clk_disable_unprepare in remove causes an imbalance and hence gives
> the below crash on module remove. While at it also remove some
> duplicate code from probe.
>
> / $ rmmod i2c-exynos5
> [ 6.996374] ------------[ cut here ]------------
> [ 6.999523] WARNING: CPU: 2 PID: 1137 at drivers/clk/clk.c:842 clk_disable+0x18/0x24()
> [ 7.007403] Modules linked in: i2c_exynos5(-)
> [ 7.011747] CPU: 2 PID: 1137 Comm: rmmod Not tainted 3.12.0-next-20131105-00083-g16f4799-dirty #21
> [ 7.020696] [<c0014e0c>] (unwind_backtrace+0x0/0xf4) from [<c0011784>] (show_stack+0x10/0x14)
> [ 7.029190] [<c0011784>] (show_stack+0x10/0x14) from [<c037acd4>] (dump_stack+0x7c/0xb0)
> [ 7.037255] [<c037acd4>] (dump_stack+0x7c/0xb0) from [<c001e0ac>] (warn_slowpath_common+0x6c/0x88)
> [ 7.046190] [<c001e0ac>] (warn_slowpath_common+0x6c/0x88) from [<c001e164>] (warn_slowpath_null+0x1c/0x24)
> [ 7.055818] [<c001e164>] (warn_slowpath_null+0x1c/0x24) from [<c02dcde4>] (clk_disable+0x18/0x24)
> [ 7.064670] [<c02dcde4>] (clk_disable+0x18/0x24) from [<bf0002d4>] (exynos5_i2c_remove+0x1c/0x34 [i2c_exynos5])
> [ 7.074736] [<bf0002d4>] (exynos5_i2c_remove+0x1c/0x34 [i2c_exynos5]) from [<c02274a8>] (__device_release_driver+0x58/0xb0)
> [ 7.085836] [<c02274a8>] (__device_release_driver+0x58/0xb0) from [<c0227b88>] (driver_detach+0xac/0xb0)
> [ 7.095291] [<c0227b88>] (driver_detach+0xac/0xb0) from [<c02271c0>] (bus_remove_driver+0x4c/0xa0)
> [ 7.104227] [<c02271c0>] (bus_remove_driver+0x4c/0xa0) from [<c00725dc>] (SyS_delete_module+0x124/0x194)
> [ 7.113682] [<c00725dc>] (SyS_delete_module+0x124/0x194) from [<c000e2e0>] (ret_fast_syscall+0x0/0x30)
> [ 7.122957] ---[ end trace 23bb6e4e0bf52196 ]---
> [ 7.127591] ------------[ cut here ]------------
> [ 7.132187] WARNING: CPU: 2 PID: 1137 at drivers/clk/clk.c:751 clk_unprepare+0x14/0x1c()
> [ 7.140259] Modules linked in: i2c_exynos5(-)
> [ 7.144560] CPU: 2 PID: 1137 Comm: rmmod Tainted: G W 3.12.0-next-20131105-00083-g16f4799-dirty #21
> [ 7.154493] [<c0014e0c>] (unwind_backtrace+0x0/0xf4) from [<c0011784>] (show_stack+0x10/0x14)
> [ 7.163006] [<c0011784>] (show_stack+0x10/0x14) from [<c037acd4>] (dump_stack+0x7c/0xb0)
> [ 7.171052] [<c037acd4>] (dump_stack+0x7c/0xb0) from [<c001e0ac>] (warn_slowpath_common+0x6c/0x88)
> [ 7.179984] [<c001e0ac>] (warn_slowpath_common+0x6c/0x88) from [<c001e164>] (warn_slowpath_null+0x1c/0x24)
> [ 7.189616] [<c001e164>] (warn_slowpath_null+0x1c/0x24) from [<c02ddcc4>] (clk_unprepare+0x14/0x1c)
> [ 7.198639] [<c02ddcc4>] (clk_unprepare+0x14/0x1c) from [<bf0002dc>] (exynos5_i2c_remove+0x24/0x34 [i2c_exynos5])
> [ 7.208876] [<bf0002dc>] (exynos5_i2c_remove+0x24/0x34 [i2c_exynos5]) from [<c02274a8>] (__device_release_driver+0x58/0xb0)
> [ 7.219978] [<c02274a8>] (__device_release_driver+0x58/0xb0) from [<c0227b88>] (driver_detach+0xac/0xb0)
> [ 7.229434] [<c0227b88>] (driver_detach+0xac/0xb0) from [<c02271c0>] (bus_remove_driver+0x4c/0xa0)
> [ 7.238369] [<c02271c0>] (bus_remove_driver+0x4c/0xa0) from [<c00725dc>] (SyS_delete_module+0x124/0x194)
> [ 7.247824] [<c00725dc>] (SyS_delete_module+0x124/0x194) from [<c000e2e0>] (ret_fast_syscall+0x0/0x30)
> [ 7.257104] ---[ end trace 23bb6e4e0bf52197 ]---
>
> Signed-off-by: Sachin Kamat <sachin.kamat-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Applied to for-next, thanks!
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prev parent reply other threads:[~2013-11-14 17:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-06 9:39 [PATCH 1/1] i2c: exynos5: Remove incorrect clk_disable_unprepare Sachin Kamat
[not found] ` <1383730758-1771-1-git-send-email-sachin.kamat-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2013-11-08 5:26 ` Naveen Krishna Ch
2013-11-14 17:19 ` Wolfram Sang [this message]
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