Messages in this thread | | | Date | Tue, 1 Sep 2015 17:14:37 +0300 | Subject | | From | Mika Penttilä <> |
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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>
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