This is a note to let you know that I've just added the patch titled
mtip32xx: Handle safe removal during IO
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mtip32xx-handle-safe-removal-during-io.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 51c6570eb922146470c2fe660c34585414679bd6 Mon Sep 17 00:00:00 2001
From: Asai Thambi SP <asamymuthupa@xxxxxxxxxx>
Date: Wed, 24 Feb 2016 21:18:10 -0800
Subject: mtip32xx: Handle safe removal during IO
From: Asai Thambi SP <asamymuthupa@xxxxxxxxxx>
commit 51c6570eb922146470c2fe660c34585414679bd6 upstream.
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@xxxxxxxxxx>
Signed-off-by: Rajesh Kumar Sambandam <rsambandam@xxxxxxxxxx>
Signed-off-by: Asai Thambi S P <asamymuthupa@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/block/mtip32xx/mtip32xx.c | 34 ++++++++++++++++++++++++++++++++--
drivers/block/mtip32xx/mtip32xx.h | 1 +
2 files changed, 33 insertions(+), 2 deletions(-)
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3602,6 +3602,28 @@ static int mtip_block_getgeo(struct bloc
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.
*
@@ -3609,6 +3631,8 @@ static int mtip_block_getgeo(struct bloc
* 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,
@@ -4434,7 +4458,7 @@ static void mtip_pci_remove(struct pci_d
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);
@@ -4451,12 +4475,18 @@ static void mtip_pci_remove(struct pci_d
} 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);
--- 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) |
Patches currently in stable-queue which might be from asamymuthupa@xxxxxxxxxx are
queue-4.4/mtip32xx-print-exact-time-when-an-internal-command-is-interrupted.patch
queue-4.4/mtip32xx-implement-timeout-handler.patch
queue-4.4/mtip32xx-cleanup-queued-requests-after-surprise-removal.patch
queue-4.4/mtip32xx-avoid-issuing-standby-immediate-cmd-during-ftl-rebuild.patch
queue-4.4/mtip32xx-handle-safe-removal-during-io.patch
queue-4.4/mtip32xx-remove-unwanted-code-from-taskfile-error-handler.patch
queue-4.4/mtip32xx-handle-ftl-rebuild-failure-state-during-device-initialization.patch
queue-4.4/mtip32xx-fix-for-rmmod-crash-when-drive-is-in-ftl-rebuild.patch
queue-4.4/mtip32xx-fix-broken-service-thread-handling.patch
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