target/fileio: Fix zero-length READ and WRITE handling
[ Upstream commit 59ac9c07 ] This patch fixes zero-length READ and WRITE handling in target/FILEIO, which was broken a long time back by: Since: commit d81cb447 Author: Paolo Bonzini <pbonzini@redhat.com> Date: Mon Sep 17 16:36:11 2012 -0700 target: go through normal processing for all zero-length commands which moved zero-length READ and WRITE completion out of target-core, to doing submission into backend driver code. To address this, go ahead and invoke target_complete_cmd() for any non negative return value in fd_do_rw(). Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Andy Grover <agrover@redhat.com> Cc: David Disseldorp <ddiss@suse.de> Cc: <stable@vger.kernel.org> # v3.7+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
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