scsi: target/core: Avoid that a kernel oops is triggered when COMPARE AND WRITE fails

Fixes: aa73237dcb2d ("scsi: target/core: Always call transport_complete_callback() upon failure")
Reviewed-by: David Disseldorp <ddiss@suse.de>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index e31e4fc..2cfd61d 100644 (file)
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1778,7 +1778,7 @@ EXPORT_SYMBOL(target_submit_tmr);
 void transport_generic_request_failure(struct se_cmd *cmd,
                sense_reason_t sense_reason)
 {
-       int ret = 0;
+       int ret = 0, post_ret;
 
        pr_debug("-----[ Storage Engine Exception; sense_reason %d\n",
                 sense_reason);
@@ -1790,7 +1790,7 @@ void transport_generic_request_failure(struct se_cmd *cmd,
        transport_complete_task_attr(cmd);
 
        if (cmd->transport_complete_callback)
-               cmd->transport_complete_callback(cmd, false, NULL);
+               cmd->transport_complete_callback(cmd, false, &post_ret);
 
        if (transport_check_aborted_status(cmd, 1))
                return;