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authorKajol Jain <kjain@linux.ibm.com>2020-08-27 12:17:32 +0530
committerIngo Molnar <mingo@kernel.org>2020-10-09 08:18:33 +0200
commit6d6b8b9f4fceab7266ca03d194f60ec72bd4b654 (patch)
tree0b4ccabc93fef10e8c6f2929907527060549d49a /fs
parentc85fb28b6f999db9928b841f63f1beeb3074eeca (diff)
downloadlinux-stericsson-6d6b8b9f4fceab7266ca03d194f60ec72bd4b654.tar.gz
perf: Fix task_function_call() error handling
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
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