diff options
| author | Chad Dupuis <chad.dupuis@qlogic.com> | 2013-10-30 08:38:16 +0100 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-12-19 16:38:58 +0100 |
| commit | f3ddac1918fe963bcbf8d407a3a3c0881b47248b (patch) | |
| tree | 307e736319180d8930154ce40309f017e3696673 /drivers/scsi/qla2xxx/qla_mr.c | |
| parent | [SCSI] qla2xxx: Refactor shutdown code so some functionality can be reused. (diff) | |
| download | linux-f3ddac1918fe963bcbf8d407a3a3c0881b47248b.tar.xz linux-f3ddac1918fe963bcbf8d407a3a3c0881b47248b.zip | |
[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.c | 2 |
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; |