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authorNeerav Parikh <Neerav.Parikh@intel.com>2012-09-24 11:52:45 -0700
committerJames Bottomley <JBottomley@Parallels.com>2012-10-07 11:49:34 +0100
commit31c37a6f21d86e6bca095b71d603ed543ae070ad (patch)
tree1f0bf61ad223ec6b59aae969f62001bae5c1437f /include/scsi
parentbd756ddea18e02ccea8b29496b2fe3bd91af8eb7 (diff)
downloadlinux-linaro-stable-31c37a6f21d86e6bca095b71d603ed543ae070ad.tar.gz
[SCSI] fcoe: Fix write errors on NPIV ports
SCSI errors were generated while writing to LUNs connected via NPIV ports. Debugging this it was found that the FCoE packets transmitted via the NPIV ports were not tagged with correct user priority as negotiated with peer by DCB agent. This resulted in FCoE traffic going with priority zero(0) that did not have priority flow control (PFC) enabled for it. The initiator after transferring data to the target never saw any reply indicating the transfer was complete. This resulted in error recovery (ABTS) and SCSI command retries by the scsi-mid layer; eventually resulting in I/O errors. This patch fixes this issue by keeping the FCoE user priority information in the fcoe_interface instance that is common for both the physical port as well as NPIV ports connected to that physical port; instead of storing it in fcoe_port structure that has a per port instance. Signed-off-by: Neerav Parikh <Neerav.Parikh@intel.com> Acked-by: Yi Zou <yi.zou@intel.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Tested-by: Marcus Dennis <marcusx.e.dennis@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/libfcoe.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index 22b07cc99808..8742d853a3b8 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -327,7 +327,6 @@ struct fcoe_percpu_s {
* @lport: The associated local port
* @fcoe_pending_queue: The pending Rx queue of skbs
* @fcoe_pending_queue_active: Indicates if the pending queue is active
- * @priority: Packet priority (DCB)
* @max_queue_depth: Max queue depth of pending queue
* @min_queue_depth: Min queue depth of pending queue
* @timer: The queue timer
@@ -343,7 +342,6 @@ struct fcoe_port {
struct fc_lport *lport;
struct sk_buff_head fcoe_pending_queue;
u8 fcoe_pending_queue_active;
- u8 priority;
u32 max_queue_depth;
u32 min_queue_depth;
struct timer_list timer;