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authorAsai Thambi SP <asamymuthupa@micron.com>2016-02-24 21:18:10 -0800
committerSasha Levin <sasha.levin@oracle.com>2016-04-18 08:50:46 -0400
commitafc16b3aab195d12ad40546d3cffcab5e3511ead (patch)
treee46dcc5f2e4d0d4dce19039bf14ec2dcf9995904 /drivers/block
parent13af0df20f8e78dc1e7239a29b2862addde3953e (diff)
mtip32xx: Handle safe removal during IO
[ Upstream commit 51c6570eb922146470c2fe660c34585414679bd6 ] Flush inflight IOs using fsync_bdev() when the device is safely removed. Also, block further IOs in device open function. Signed-off-by: Selvan Mani <smani@micron.com> Signed-off-by: Rajesh Kumar Sambandam <rsambandam@micron.com> Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com> Cc: stable@vger.kernel.org Signed-off-by: Jens Axboe <axboe@fb.com> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/mtip32xx/mtip32xx.c34
-rw-r--r--drivers/block/mtip32xx/mtip32xx.h1
2 files changed, 33 insertions, 2 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 4b9a0a48dc3a..b4e5a971c16d 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3642,6 +3642,28 @@ static int mtip_block_getgeo(struct block_device *dev,
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.
*
@@ -3649,6 +3671,8 @@ static int mtip_block_getgeo(struct block_device *dev,
* layer.
*/
static const struct block_device_operations mtip_block_ops = {
+ .open = mtip_block_open,
+ .release = mtip_block_release,
.ioctl = mtip_block_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = mtip_block_compat_ioctl,
@@ -4442,7 +4466,7 @@ static void mtip_pci_remove(struct pci_dev *pdev)
struct driver_data *dd = pci_get_drvdata(pdev);
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);
list_del_init(&dd->online_list);
@@ -4459,12 +4483,18 @@ static void mtip_pci_remove(struct pci_dev *pdev)
} while (atomic_read(&dd->irq_workers_active) != 0 &&
time_before(jiffies, to));
+ fsync_bdev(dd->bdev);
+
if (atomic_read(&dd->irq_workers_active) != 0) {
dev_warn(&dd->pdev->dev,
"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. */
mtip_block_remove(dd);
diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h
index ba1b31ee22ec..76695265dffb 100644
--- a/drivers/block/mtip32xx/mtip32xx.h
+++ b/drivers/block/mtip32xx/mtip32xx.h
@@ -155,6 +155,7 @@ enum {
MTIP_DDF_RESUME_BIT = 6,
MTIP_DDF_INIT_DONE_BIT = 7,
MTIP_DDF_REBUILD_FAILED_BIT = 8,
+ MTIP_DDF_REMOVAL_BIT = 9,
MTIP_DDF_STOP_IO = ((1 << MTIP_DDF_REMOVE_PENDING_BIT) |
(1 << MTIP_DDF_SEC_LOCK_BIT) |