* [PATCH 1/1] i2c: exynos5: Remove incorrect clk_disable_unprepare
@ 2013-11-06 9:39 Sachin Kamat
[not found] ` <1383730758-1771-1-git-send-email-sachin.kamat-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
0 siblings, 1 reply; 3+ messages in thread
From: Sachin Kamat @ 2013-11-06 9:39 UTC (permalink / raw)
To: linux-i2c-u79uwXL29TY76Z2rM5mHXA
Cc: wsa-z923LK4zBo2bacvFa/9K2g, sachin.kamat-QSEj5FYQhm4dnm+yROfE0A,
Naveen Krishna Chatradhi
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>
Cc: Naveen Krishna Chatradhi <ch.naveen-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
---
drivers/i2c/busses/i2c-exynos5.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/drivers/i2c/busses/i2c-exynos5.c b/drivers/i2c/busses/i2c-exynos5.c
index d419300..c1ef228 100644
--- a/drivers/i2c/busses/i2c-exynos5.c
+++ b/drivers/i2c/busses/i2c-exynos5.c
@@ -702,10 +702,6 @@ static int exynos5_i2c_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, i2c);
- clk_disable_unprepare(i2c->clk);
-
- return 0;
-
err_clk:
clk_disable_unprepare(i2c->clk);
return ret;
@@ -716,7 +712,6 @@ static int exynos5_i2c_remove(struct platform_device *pdev)
struct exynos5_i2c *i2c = platform_get_drvdata(pdev);
i2c_del_adapter(&i2c->adap);
- clk_disable_unprepare(i2c->clk);
return 0;
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 3+ messages in thread[parent not found: <1383730758-1771-1-git-send-email-sachin.kamat-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>]
* Re: [PATCH 1/1] i2c: exynos5: Remove incorrect clk_disable_unprepare [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 1 sibling, 0 replies; 3+ messages in thread From: Naveen Krishna Ch @ 2013-11-08 5:26 UTC (permalink / raw) To: Sachin Kamat Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA, wsa-z923LK4zBo2bacvFa/9K2g, Naveen Krishna Chatradhi On 6 November 2013 15:09, Sachin Kamat <sachin.kamat-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 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> > Cc: Naveen Krishna Chatradhi <ch.naveen-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> Acked-by: Naveen Krishna Chatradhi <ch.naveen-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> > --- > drivers/i2c/busses/i2c-exynos5.c | 5 ----- > 1 file changed, 5 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-exynos5.c b/drivers/i2c/busses/i2c-exynos5.c > index d419300..c1ef228 100644 > --- a/drivers/i2c/busses/i2c-exynos5.c > +++ b/drivers/i2c/busses/i2c-exynos5.c > @@ -702,10 +702,6 @@ static int exynos5_i2c_probe(struct platform_device *pdev) > > platform_set_drvdata(pdev, i2c); > > - clk_disable_unprepare(i2c->clk); > - > - return 0; > - > err_clk: > clk_disable_unprepare(i2c->clk); > return ret; > @@ -716,7 +712,6 @@ static int exynos5_i2c_remove(struct platform_device *pdev) > struct exynos5_i2c *i2c = platform_get_drvdata(pdev); > > i2c_del_adapter(&i2c->adap); > - clk_disable_unprepare(i2c->clk); > > return 0; > } > -- > 1.7.9.5 Thanks for the testing and fix. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-i2c" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Shine bright, (: Nav :) ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH 1/1] i2c: exynos5: Remove incorrect clk_disable_unprepare [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 1 sibling, 0 replies; 3+ messages in thread From: Wolfram Sang @ 2013-11-14 17:19 UTC (permalink / raw) To: Sachin Kamat; +Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA, Naveen Krishna Chatradhi [-- Attachment #1: Type: text/plain, Size: 3522 bytes --] 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! [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply [flat|nested] 3+ messages in thread
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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
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