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authorChad Dupuis <chad.dupuis@qlogic.com>2013-10-30 03:38:16 -0400
committerJames Bottomley <JBottomley@Parallels.com>2013-12-19 07:38:58 -0800
commitf3ddac1918fe963bcbf8d407a3a3c0881b47248b (patch)
tree307e736319180d8930154ce40309f017e3696673 /drivers/scsi/qla2xxx/qla_mr.c
parentfe1b806f4f7172b1eae18ddeebb7d8fb351043f7 (diff)
downloadlinux-f3ddac1918fe963bcbf8d407a3a3c0881b47248b.tar.bz2
[SCSI] qla2xxx: Disable adapter when we encounter a PCI disconnect.
If we become disconnected from the PCI bus/PCIe fabric, there can be long delays in register reads which can cause erroneous decisions to be made and cause a soft lockup if a lock is held too long. As a preventative measure, check for a disconnection (register reads that return -1) and then disable the board if we find ourselves in this condition. For now, check in our interrupt handlers and the per adapter one second timer. Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com> Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_mr.c')
-rw-r--r--drivers/scsi/qla2xxx/qla_mr.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_mr.c b/drivers/scsi/qla2xxx/qla_mr.c
index cd3bedd00487..7c17b9277c3f 100644
--- a/drivers/scsi/qla2xxx/qla_mr.c
+++ b/drivers/scsi/qla2xxx/qla_mr.c
@@ -3017,6 +3017,8 @@ qlafx00_intr_handler(int irq, void *dev_id)
vha = pci_get_drvdata(ha->pdev);
for (iter = 50; iter--; clr_intr = 0) {
stat = QLAFX00_RD_INTR_REG(ha);
+ if (qla2x00_check_reg_for_disconnect(vha, stat))
+ break;
if ((stat & QLAFX00_HST_INT_STS_BITS) == 0)
break;