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SubjectRe: [PATCH v3] scsi: ibmvscsi: Don't use rc uninitialized in ibmvscsi_do_work
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On 06/03/2019 04:44 PM, Nathan Chancellor wrote:
> clang warns:
>
> drivers/scsi/ibmvscsi/ibmvscsi.c:2126:7: warning: variable 'rc' is used
> uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
> case IBMVSCSI_HOST_ACTION_NONE:
> ^~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/scsi/ibmvscsi/ibmvscsi.c:2151:6: note: uninitialized use occurs
> here
> if (rc) {
> ^~
>
> Initialize rc in the IBMVSCSI_HOST_ACTION_UNBLOCK case statement then
> shuffle IBMVSCSI_HOST_ACTION_NONE down to the default case statement and
> make it return early so that rc is never used uninitialized in this
> function.
>
> Fixes: 035a3c4046b5 ("scsi: ibmvscsi: redo driver work thread to use enum action states")
> Link: https://github.com/ClangBuiltLinux/linux/issues/502
> Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
> Suggested-by: Tyrel Datwyler <tyreld@linux.ibm.com>
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

Acked-by: Tyrel Datwyler <tyreld@linux.ibm.com>

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