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authorAnirban Chakraborty <anirban.chakraborty@qlogic.com>2009-08-04 16:12:13 -0700
committerJames Bottomley <James.Bottomley@suse.de>2009-08-22 17:52:19 -0500
commiteb94114bfd894dce1955e2ece575db544cecd921 (patch)
tree2c55270c760568cdaa63697af50046ebfb3c579e /drivers/scsi/qla2xxx
parent80de7efa6d6a4eb72e917bb2d814f38332090d45 (diff)
downloadop-kernel-dev-eb94114bfd894dce1955e2ece575db544cecd921.zip
op-kernel-dev-eb94114bfd894dce1955e2ece575db544cecd921.tar.gz
[SCSI] qla2xxx: Fix a bug that clears the interrupt status register for the base queue
The interrupt handler clears the interrupt status register for response updates in the base queue while working in the multique mode. This could lead to missing interrupt for async events, mail box completions etc. as these are also handled in the base queue. The fix ensures that the interrupt bit is not cleared for response updates in the ISR when the driver is working in multiqueue mode. Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/qla2xxx')
-rw-r--r--drivers/scsi/qla2xxx/qla_isr.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 40014f3..74fa6f9 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1769,8 +1769,10 @@ qla24xx_msix_rsp_q(int irq, void *dev_id)
vha = qla25xx_get_host(rsp);
qla24xx_process_response_queue(vha, rsp);
- WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
-
+ if (!ha->mqenable) {
+ WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
+ RD_REG_DWORD_RELAXED(&reg->hccr);
+ }
spin_unlock_irq(&ha->hardware_lock);
return IRQ_HANDLED;
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