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authorBart Van Assche <bart.vanassche@sandisk.com>2017-01-09 10:14:54 -0800
committerNicholas Bellinger <nab@linux-iscsi.org>2017-02-09 00:39:12 -0800
commita5eb307f37d1e9909284b6f0a8f72bf55423c137 (patch)
treef4051d2d6831f2fd98d7bc5906dd4a74e2d1e689
parent2d4760ee4720d5f0eeda770ce248244166676283 (diff)
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target: Stop execution if CMD_T_STOP has been set
Stop execution if CMD_T_STOP has been set for a command just after the command has been added to the device command list and before .write_pending() is called. The following sequence can trigger this: - transport_handle_cdb_direct() gets called. This function namely sets CMD_T_ACTIVE before it calls transport_generic_new_cmd(). - __transport_wait_for_tasks() is called concurrently. This function sets CMD_T_STOP for all active commands that have not been aborted. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Andy Grover <agrover@redhat.com> Cc: David Disseldorp <ddiss@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
-rw-r--r--drivers/target/target_core_transport.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 62a50ea52a49..2d867af1961f 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2452,7 +2452,8 @@ transport_generic_new_cmd(struct se_cmd *cmd)
target_execute_cmd(cmd);
return 0;
}
- transport_cmd_check_stop(cmd, false, true);
+ if (transport_cmd_check_stop(cmd, false, true))
+ return 0;
ret = cmd->se_tfo->write_pending(cmd);
if (ret == -EAGAIN || ret == -ENOMEM)