From 1073daa470d906f1853ed4b828f16e2350a5875c Mon Sep 17 00:00:00 2001 From: Quinn Tran Date: Tue, 4 Sep 2018 14:19:10 -0700 Subject: scsi: qla2xxx: Fix deadlock between ATIO and HW lock Move ATIO queue processing out of hardware_lock to prevent deadlock. Fixes: 3bb67df5b5f8 ("qla2xxx: Check for online flag instead of active reset when transmitting responses") Signed-off-by: Quinn Tran Signed-off-by: Himanshu Madhani Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_isr.c | 48 +++++++++++++++++++----------------------- 1 file changed, 22 insertions(+), 26 deletions(-) (limited to 'drivers/scsi/qla2xxx/qla_isr.c') diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index 36cbb29c84f6..bc97e3a1bef7 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -3121,6 +3121,7 @@ qla24xx_intr_handler(int irq, void *dev_id) uint16_t mb[8]; struct rsp_que *rsp; unsigned long flags; + bool process_atio = false; rsp = (struct rsp_que *) dev_id; if (!rsp) { @@ -3181,22 +3182,13 @@ qla24xx_intr_handler(int irq, void *dev_id) qla24xx_process_response_queue(vha, rsp); break; case INTR_ATIO_QUE_UPDATE_27XX: - case INTR_ATIO_QUE_UPDATE:{ - unsigned long flags2; - spin_lock_irqsave(&ha->tgt.atio_lock, flags2); - qlt_24xx_process_atio_queue(vha, 1); - spin_unlock_irqrestore(&ha->tgt.atio_lock, flags2); + case INTR_ATIO_QUE_UPDATE: + process_atio = true; break; - } - case INTR_ATIO_RSP_QUE_UPDATE: { - unsigned long flags2; - spin_lock_irqsave(&ha->tgt.atio_lock, flags2); - qlt_24xx_process_atio_queue(vha, 1); - spin_unlock_irqrestore(&ha->tgt.atio_lock, flags2); - + case INTR_ATIO_RSP_QUE_UPDATE: + process_atio = true; qla24xx_process_response_queue(vha, rsp); break; - } default: ql_dbg(ql_dbg_async, vha, 0x504f, "Unrecognized interrupt type (%d).\n", stat * 0xff); @@ -3210,6 +3202,12 @@ qla24xx_intr_handler(int irq, void *dev_id) qla2x00_handle_mbx_completion(ha, status); spin_unlock_irqrestore(&ha->hardware_lock, flags); + if (process_atio) { + spin_lock_irqsave(&ha->tgt.atio_lock, flags); + qlt_24xx_process_atio_queue(vha, 0); + spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); + } + return IRQ_HANDLED; } @@ -3256,6 +3254,7 @@ qla24xx_msix_default(int irq, void *dev_id) uint32_t hccr; uint16_t mb[8]; unsigned long flags; + bool process_atio = false; rsp = (struct rsp_que *) dev_id; if (!rsp) { @@ -3312,22 +3311,13 @@ qla24xx_msix_default(int irq, void *dev_id) qla24xx_process_response_queue(vha, rsp); break; case INTR_ATIO_QUE_UPDATE_27XX: - case INTR_ATIO_QUE_UPDATE:{ - unsigned long flags2; - spin_lock_irqsave(&ha->tgt.atio_lock, flags2); - qlt_24xx_process_atio_queue(vha, 1); - spin_unlock_irqrestore(&ha->tgt.atio_lock, flags2); + case INTR_ATIO_QUE_UPDATE: + process_atio = true; break; - } - case INTR_ATIO_RSP_QUE_UPDATE: { - unsigned long flags2; - spin_lock_irqsave(&ha->tgt.atio_lock, flags2); - qlt_24xx_process_atio_queue(vha, 1); - spin_unlock_irqrestore(&ha->tgt.atio_lock, flags2); - + case INTR_ATIO_RSP_QUE_UPDATE: + process_atio = true; qla24xx_process_response_queue(vha, rsp); break; - } default: ql_dbg(ql_dbg_async, vha, 0x5051, "Unrecognized interrupt type (%d).\n", stat & 0xff); @@ -3338,6 +3328,12 @@ qla24xx_msix_default(int irq, void *dev_id) qla2x00_handle_mbx_completion(ha, status); spin_unlock_irqrestore(&ha->hardware_lock, flags); + if (process_atio) { + spin_lock_irqsave(&ha->tgt.atio_lock, flags); + qlt_24xx_process_atio_queue(vha, 0); + spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); + } + return IRQ_HANDLED; } -- cgit