* (no subject)
@ 2015-09-01 14:14 ` Mika Penttilä
0 siblings, 0 replies; 4+ messages in thread
From: Mika Penttilä @ 2015-09-01 14:14 UTC (permalink / raw)
To: linux-kernel, linux-arm-kernel, edubezval
This one causes imx6q with debug uart connected to "schedule while
atomic" endlessly :
9e7b399d6528eac33a6fbfceb2b92af209c3454d is the first bad commit
commit 9e7b399d6528eac33a6fbfceb2b92af209c3454d
Author: Eduardo Valentin <edubezval@gmail.com>
Date: Tue Aug 11 10:21:20 2015 -0700
serial: imx: remove unbalanced clk_prepare
The current code attempts to prepare clk_per and clk_ipg
before using the device. However, the result is an extra
prepare call on each clock. Here is the output of uart
clocks (only uart enabled and used as console):
$ grep uart /sys/kernel/debug/clk/clk_summary
uart_serial 1 2 80000000 0 0
uart 1 2 66000000 0 0
This patch balances the calls of prepares. The result is:
$ grep uart /sys/kernel/debug/clk/clk_summary
uart_serial 1 1 80000000 0 0
uart 1 1 66000000 0 0
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-serial@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
^ permalink raw reply [flat|nested] 4+ messages in thread
* No subject
@ 2015-09-01 14:14 ` Mika Penttilä
0 siblings, 0 replies; 4+ messages in thread
From: Mika Penttilä @ 2015-09-01 14:14 UTC (permalink / raw)
To: linux-arm-kernel
This one causes imx6q with debug uart connected to "schedule while
atomic" endlessly :
9e7b399d6528eac33a6fbfceb2b92af209c3454d is the first bad commit
commit 9e7b399d6528eac33a6fbfceb2b92af209c3454d
Author: Eduardo Valentin <edubezval@gmail.com>
Date: Tue Aug 11 10:21:20 2015 -0700
serial: imx: remove unbalanced clk_prepare
The current code attempts to prepare clk_per and clk_ipg
before using the device. However, the result is an extra
prepare call on each clock. Here is the output of uart
clocks (only uart enabled and used as console):
$ grep uart /sys/kernel/debug/clk/clk_summary
uart_serial 1 2 80000000 0 0
uart 1 2 66000000 0 0
This patch balances the calls of prepares. The result is:
$ grep uart /sys/kernel/debug/clk/clk_summary
uart_serial 1 1 80000000 0 0
uart 1 1 66000000 0 0
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-serial at vger.kernel.org
Cc: linux-pm at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re:
2015-09-01 14:14 ` No subject Mika Penttilä
@ 2015-09-01 15:22 ` Fabio Estevam
-1 siblings, 0 replies; 4+ messages in thread
From: Fabio Estevam @ 2015-09-01 15:22 UTC (permalink / raw)
To: Mika Penttilä; +Cc: linux-kernel, linux-arm-kernel, Eduardo Valentin
On Tue, Sep 1, 2015 at 11:14 AM, Mika Penttilä
<mika.j.penttila@gmail.com> wrote:
> This one causes imx6q with debug uart connected to "schedule while
> atomic" endlessly :
Yes, I have sent a revert patch for it:
http://www.spinics.net/lists/arm-kernel/msg439995.html
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2015-09-01 15:22 UTC | newest]
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