scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
[ Upstream commit 8de58074 ] We may exit this function without properly freeing up the maapings we may have acquired. Fix the bug. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Long Li <longli@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: James Bottomley <JBottomley@Odin.com> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
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