41 lines
1.2 KiB
Diff
41 lines
1.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Thomas Lamprecht <t.lamprecht@proxmox.com>
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Date: Tue, 9 Nov 2021 12:01:12 +0100
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Subject: [PATCH] Revert "block: remove the -ERESTARTSYS handling in
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blkdev_get_by_dev"
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This reverts commit a8ed1a0607cfa5478ff6009539f44790c4d0956d.
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It breaks ZFS sometimes:
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https://github.com/openzfs/zfs/issues/12301#issuecomment-873303739
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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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---
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block/bdev.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/block/bdev.c b/block/bdev.c
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index 485a258b0ab3..f93165f05987 100644
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--- a/block/bdev.c
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+++ b/block/bdev.c
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@@ -800,6 +800,10 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder)
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if (ret)
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return ERR_PTR(ret);
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+ /*
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+ * If we lost a race with 'disk' being deleted, try again. See md.c.
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+ */
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+retry:
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bdev = blkdev_get_no_open(dev);
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if (!bdev)
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return ERR_PTR(-ENXIO);
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@@ -852,6 +856,8 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder)
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disk_unblock_events(disk);
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put_blkdev:
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blkdev_put_no_open(bdev);
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+ if (ret == -ERESTARTSYS)
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+ goto retry;
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return ERR_PTR(ret);
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}
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EXPORT_SYMBOL(blkdev_get_by_dev);
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