diff options
| author | Asai Thambi SP <asamymuthupa@micron.com> | 2016-02-25 05:18:10 (GMT) |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-03-03 16:08:43 (GMT) |
| commit | 51c6570eb922146470c2fe660c34585414679bd6 (patch) | |
| tree | 1bb30615e06ad211bd7c4185e163332410b1a469 /drivers/block | |
| parent | 59cf70e236c96594d9f1e065755d8fce9df5356b (diff) | |
| download | linux-51c6570eb922146470c2fe660c34585414679bd6.tar.xz | |
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: 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>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.c | 34 | ||||
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.h | 1 |
2 files changed, 33 insertions, 2 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index 4c4d13a..6268ea0 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -3595,6 +3595,28 @@ 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. * @@ -3602,6 +3624,8 @@ 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, @@ -4427,7 +4451,7 @@ 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); @@ -4444,12 +4468,18 @@ 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 8635239..50af742 100644 --- a/drivers/block/mtip32xx/mtip32xx.h +++ b/drivers/block/mtip32xx/mtip32xx.h @@ -158,6 +158,7 @@ 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) | |