IB/ipath: HW workaround for case where chip can send but not receive

Workaround a QLE7140 problem that in rare cases causes flow control
problems after link recovery by forcing a link retrain after recovery.
A module parameter is provided to control the behavior in case it causes
problems.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h
index 960d5b7e7865..b8b81cb745b9 100644
--- a/drivers/infiniband/hw/ipath/ipath_kernel.h
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h
@@ -309,6 +309,7 @@ struct ipath_devdata {
         ipath_err_t ipath_lasthwerror;
         /* errors masked because they occur too fast */
         ipath_err_t ipath_maskederrs;
+        u64 ipath_lastlinkrecov; /* link recoveries at last ACTIVE */
         /* time in jiffies at which to re-enable maskederrs */
         unsigned long ipath_unmasktime;
         /* count of egrfull errors, combined for all ports */
@@ -1099,6 +1100,7 @@ dma_addr_t ipath_map_single(struct pci_dev *, void *, size_t, int);
 #endif
 
 extern unsigned ipath_debug; /* debugging bit mask */
+extern unsigned ipath_linkrecovery;
 extern unsigned ipath_mtu4096;
 
 #define IPATH_MAX_PARITY_ATTEMPTS 10000 /* max times to try recovery */