target: Fix possible TFO->write_pending() sense_reason_t silent WRITE corruption
This patch fixes a possible case in transport_generic_new_cmd() where a
failure from TFO->write_pending() from a fabric module return something
other than -EAGAIN or -ENOMEM would cause a failed WRITE to silently
succeed.
Go ahead and return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE for this
special case instead of only just making noise with WARN_ON().
(v2: Fix incorrect exception return for all cases)
Cc: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 98044bf..63d7848 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2127,7 +2127,7 @@
/* fabric drivers should only return -EAGAIN or -ENOMEM as error */
WARN_ON(ret);
- return 0;
+ return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
queue_full:
pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd);