The patch titled
Remove bdput from do_open() in fs/block_dev.c
has been added to the -mm tree. Its filename is
remove-bdput-from-do_open-in-fs-block_devc.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Remove bdput from do_open() in fs/block_dev.c
From: Rafa³ Bilski <rafalbilski@xxxxxxxxxx>
I mistyped
# echo /dev/hdc1 >/sys/module/block2mtd/parameters/block2mt
instead of sdc1. There is no /dev/hdc1. I have DVD-ROM as /dev/hdc.
# dmesg
block2mtd: version $Revision: 1.30 $
block2mtd: error: cannot open device /dev/hdc1
Looks right, but tray is locked. And it doesn't want to get out.
# eject
hdc: irq timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
WARNING: at kernel/irq/resend.c:70 check_irq_resend()
[<c013444b>] check_irq_resend+0xab/0xc0
[<c0133e2a>] enable_irq+0x4a/0xa0
[<c02c26e7>] ide_error+0x47/0xa0
[<c02d1e60>] cdrom_newpc_intr+0x0/0x300
[<c02c2bc0>] ide_timer_expiry+0x1e0/0x2d0
[<c02c29e0>] ide_timer_expiry+0x0/0x2d0
[<c011b986>] run_timer_softirq+0x116/0x160
[<c0127e75>] hrtimer_interrupt+0x165/0x1a0
[<c0118772>] __do_softirq+0x42/0x90
[<c01187e6>] do_softirq+0x26/0x30
[<c0118aaa>] irq_exit+0x5a/0x60
[<c0104817>] do_IRQ+0x47/0x80
[<c0102c23>] common_interrupt+0x23/0x30
[<c0281a46>] acpi_processor_idle+0x162/0x380
[<c0100d0e>] cpu_idle+0x4e/0x70
[<c0524ac5>] start_kernel+0x1f5/0x240
[<c05243a0>] unknown_bootoption+0x0/0x1e0
=======================
Removing bdput from do_open() in fs/block_dev.c seems to be a cure for irq
timeout.
Signed-off-by: Rafa³ Bilski <rafalbilski@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/block_dev.c | 1 -
1 files changed, 1 deletion(-)
diff -puN fs/block_dev.c~remove-bdput-from-do_open-in-fs-block_devc fs/block_dev.c
--- a/fs/block_dev.c~remove-bdput-from-do_open-in-fs-block_devc
+++ a/fs/block_dev.c
@@ -1120,7 +1120,6 @@ static int do_open(struct block_device *
disk = get_gendisk(bdev->bd_dev, &part);
if (!disk) {
unlock_kernel();
- bdput(bdev);
return ret;
}
owner = disk->fops->owner;
_
Patches currently in -mm which might be from rafalbilski@xxxxxxxxxx are
remove-bdput-from-do_open-in-fs-block_devc.patch
remove-bdput-from-do_open-in-fs-block_devc-fix.patch
-
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