From: Anirban Chakraborty Date: Tue, 4 Aug 2009 23:12:13 +0000 (-0700) Subject: [SCSI] qla2xxx: Fix a bug that clears the interrupt status register for the base... X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=eb94114bfd894dce1955e2ece575db544cecd921;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git [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 Signed-off-by: James Bottomley Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index 40014f3407b9..74fa6f992041 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(®->hccr, HCCRX_CLR_RISC_INT); - + if (!ha->mqenable) { + WRT_REG_DWORD(®->hccr, HCCRX_CLR_RISC_INT); + RD_REG_DWORD_RELAXED(®->hccr); + } spin_unlock_irq(&ha->hardware_lock); return IRQ_HANDLED;