Commit 51c6570e authored by Asai Thambi SP's avatar Asai Thambi SP Committed by Jens Axboe

mtip32xx: Handle safe removal during IO

Flush inflight IOs using fsync_bdev() when the device is safely
removed. Also, block further IOs in device open function.
Signed-off-by: default avatarSelvan Mani <smani@micron.com>
Signed-off-by: default avatarRajesh Kumar Sambandam <rsambandam@micron.com>
Signed-off-by: default avatarAsai Thambi S P <asamymuthupa@micron.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 59cf70e2
...@@ -3595,6 +3595,28 @@ static int mtip_block_getgeo(struct block_device *dev, ...@@ -3595,6 +3595,28 @@ static int mtip_block_getgeo(struct block_device *dev,
return 0; return 0;
} }
static int mtip_block_open(struct block_device *dev, fmode_t mode)
{
struct driver_data *dd;
if (dev && dev->bd_disk) {
dd = (struct driver_data *) dev->bd_disk->private_data;
if (dd) {
if (test_bit(MTIP_DDF_REMOVAL_BIT,
&dd->dd_flag)) {
return -ENODEV;
}
return 0;
}
}
return -ENODEV;
}
void mtip_block_release(struct gendisk *disk, fmode_t mode)
{
}
/* /*
* Block device operation function. * Block device operation function.
* *
...@@ -3602,6 +3624,8 @@ static int mtip_block_getgeo(struct block_device *dev, ...@@ -3602,6 +3624,8 @@ static int mtip_block_getgeo(struct block_device *dev,
* layer. * layer.
*/ */
static const struct block_device_operations mtip_block_ops = { static const struct block_device_operations mtip_block_ops = {
.open = mtip_block_open,
.release = mtip_block_release,
.ioctl = mtip_block_ioctl, .ioctl = mtip_block_ioctl,
#ifdef CONFIG_COMPAT #ifdef CONFIG_COMPAT
.compat_ioctl = mtip_block_compat_ioctl, .compat_ioctl = mtip_block_compat_ioctl,
...@@ -4427,7 +4451,7 @@ static void mtip_pci_remove(struct pci_dev *pdev) ...@@ -4427,7 +4451,7 @@ static void mtip_pci_remove(struct pci_dev *pdev)
struct driver_data *dd = pci_get_drvdata(pdev); struct driver_data *dd = pci_get_drvdata(pdev);
unsigned long flags, to; unsigned long flags, to;
set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag); set_bit(MTIP_DDF_REMOVAL_BIT, &dd->dd_flag);
spin_lock_irqsave(&dev_lock, flags); spin_lock_irqsave(&dev_lock, flags);
list_del_init(&dd->online_list); list_del_init(&dd->online_list);
...@@ -4444,12 +4468,18 @@ static void mtip_pci_remove(struct pci_dev *pdev) ...@@ -4444,12 +4468,18 @@ static void mtip_pci_remove(struct pci_dev *pdev)
} while (atomic_read(&dd->irq_workers_active) != 0 && } while (atomic_read(&dd->irq_workers_active) != 0 &&
time_before(jiffies, to)); time_before(jiffies, to));
fsync_bdev(dd->bdev);
if (atomic_read(&dd->irq_workers_active) != 0) { if (atomic_read(&dd->irq_workers_active) != 0) {
dev_warn(&dd->pdev->dev, dev_warn(&dd->pdev->dev,
"Completion workers still active!\n"); "Completion workers still active!\n");
} }
blk_mq_stop_hw_queues(dd->queue); if (dd->sr)
blk_mq_stop_hw_queues(dd->queue);
set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
/* Clean up the block layer. */ /* Clean up the block layer. */
mtip_block_remove(dd); mtip_block_remove(dd);
......
...@@ -158,6 +158,7 @@ enum { ...@@ -158,6 +158,7 @@ enum {
MTIP_DDF_RESUME_BIT = 6, MTIP_DDF_RESUME_BIT = 6,
MTIP_DDF_INIT_DONE_BIT = 7, MTIP_DDF_INIT_DONE_BIT = 7,
MTIP_DDF_REBUILD_FAILED_BIT = 8, MTIP_DDF_REBUILD_FAILED_BIT = 8,
MTIP_DDF_REMOVAL_BIT = 9,
MTIP_DDF_STOP_IO = ((1 << MTIP_DDF_REMOVE_PENDING_BIT) | MTIP_DDF_STOP_IO = ((1 << MTIP_DDF_REMOVE_PENDING_BIT) |
(1 << MTIP_DDF_SEC_LOCK_BIT) | (1 << MTIP_DDF_SEC_LOCK_BIT) |
......
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