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| author | Kajol Jain <kjain@linux.ibm.com> | 2020-08-27 12:17:32 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-14 09:48:17 +0200 |
| commit | 1cd6cc24e41cb0d23c74f3b490a6e911c41cd158 (patch) | |
| tree | dc8706b0b650b801797aa569f3e7bc84d851f23e /mm | |
| parent | 2f2a503643ad8204be8f8f8e7fb7f227b5972e4a (diff) | |
| download | linux-stable-1cd6cc24e41cb0d23c74f3b490a6e911c41cd158.tar.gz | |
perf: Fix task_function_call() error handling
[ Upstream commit 6d6b8b9f4fceab7266ca03d194f60ec72bd4b654 ]
The error handling introduced by commit:
2ed6edd33a21 ("perf: Add cond_resched() to task_function_call()")
looses any return value from smp_call_function_single() that is not
{0, -EINVAL}. This is a problem because it will return -EXNIO when the
target CPU is offline. Worse, in that case it'll turn into an infinite
loop.
Fixes: 2ed6edd33a21 ("perf: Add cond_resched() to task_function_call()")
Reported-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Barret Rhoden <brho@google.com>
Tested-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Link: https://lkml.kernel.org/r/20200827064732.20860-1-kjain@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions