libata: fix EH locking

[karo-tx-linux.git] / drivers / scsi / libata-core.c

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 157a3e914cb73a3c62bc4e19443edcb99d48ac3b..ec7bff73ae18d3206f6d96e84398b37e91898acf 100644 (file)
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -2388,12 +2388,13 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
 void ata_poll_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
 {
        struct ata_port *ap = qc->ap;
+       unsigned long flags;
 
-       spin_lock_irq(&ap->host_set->lock);
+       spin_lock_irqsave(&ap->host_set->lock, flags);
        ap->flags &= ~ATA_FLAG_NOINTR;
        ata_irq_on(ap);
        ata_qc_complete(qc, drv_stat);
-       spin_unlock_irq(&ap->host_set->lock);
+       spin_unlock_irqrestore(&ap->host_set->lock, flags);
 }
 
 /**
@@ -2973,8 +2974,10 @@ static void atapi_request_sense(struct ata_port *ap, struct ata_device *dev,
 static void ata_qc_timeout(struct ata_queued_cmd *qc)
 {
        struct ata_port *ap = qc->ap;
+       struct ata_host_set *host_set = ap->host_set;
        struct ata_device *dev = qc->dev;
        u8 host_stat = 0, drv_stat;
+       unsigned long flags;
 
        DPRINTK("ENTER\n");
 
@@ -2985,7 +2988,9 @@ static void ata_qc_timeout(struct ata_queued_cmd *qc)
                if (!(cmd->eh_eflags & SCSI_EH_CANCEL_CMD)) {
 
                        /* finish completing original command */
+                       spin_lock_irqsave(&host_set->lock, flags);
                        __ata_qc_complete(qc);
+                       spin_unlock_irqrestore(&host_set->lock, flags);
 
                        atapi_request_sense(ap, dev, cmd);
 
@@ -2996,6 +3001,8 @@ static void ata_qc_timeout(struct ata_queued_cmd *qc)
                }
        }
 
+       spin_lock_irqsave(&host_set->lock, flags);
+
        /* hack alert!  We cannot use the supplied completion
         * function from inside the ->eh_strategy_handler() thread.
         * libata is the only user of ->eh_strategy_handler() in
@@ -3029,6 +3036,9 @@ static void ata_qc_timeout(struct ata_queued_cmd *qc)
                ata_qc_complete(qc, drv_stat);
                break;
        }
+
+       spin_unlock_irqrestore(&host_set->lock, flags);
+
 out:
        DPRINTK("EXIT\n");
 }