diff options
| -rw-r--r-- | drivers/block/xen-blkfront.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index b27917dfdcc0..1e44b7880200 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -1319,11 +1319,13 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id) unsigned long flags; struct blkfront_info *info = (struct blkfront_info *)dev_id; int error; + unsigned int eoiflag = XEN_EOI_FLAG_SPURIOUS; spin_lock_irqsave(&info->io_lock, flags); if (unlikely(info->connected != BLKIF_STATE_CONNECTED)) { spin_unlock_irqrestore(&info->io_lock, flags); + xen_irq_lateeoi(irq, XEN_EOI_FLAG_SPURIOUS); return IRQ_HANDLED; } @@ -1340,6 +1342,8 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id) unsigned long id; unsigned int op; + eoiflag = 0; + RING_COPY_RESPONSE(&info->ring, i, &bret); id = bret.id; @@ -1444,6 +1448,8 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id) spin_unlock_irqrestore(&info->io_lock, flags); + xen_irq_lateeoi(irq, eoiflag); + return IRQ_HANDLED; err: @@ -1451,6 +1457,8 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id) spin_unlock_irqrestore(&info->io_lock, flags); + /* No EOI in order to avoid further interrupts. */ + pr_alert("%s disabled for further use\n", info->gd->disk_name); return IRQ_HANDLED; } @@ -1489,8 +1497,8 @@ static int setup_blkring(struct xenbus_device *dev, if (err) goto fail; - err = bind_evtchn_to_irqhandler(info->evtchn, blkif_interrupt, 0, - "blkif", info); + err = bind_evtchn_to_irqhandler_lateeoi(info->evtchn, blkif_interrupt, + 0, "blkif", info); if (err <= 0) { xenbus_dev_fatal(dev, err, "bind_evtchn_to_irqhandler failed"); |