From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: stable-review@kernel.org, torvalds@linux-foundation.org,
akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk,
Jan Kara <jack@suse.cz>
Subject: [patch 04/10] udf: Use device size when drive reported bogus number of written blocks
Date: Wed, 16 Sep 2009 15:13:24 -0700 [thread overview]
Message-ID: <20090916221506.226614681@mini.kroah.org> (raw)
In-Reply-To: <20090916221529.GA28162@kroah.com>
[-- Attachment #1: udf-use-device-size-when-drive-reported-bogus-number-of-written-blocks.patch --]
[-- Type: text/plain, Size: 1055 bytes --]
2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------
From: Jan Kara <jack@suse.cz>
commit 24a5d59f3477bcff4c069ff4d0ca9a3e037d0235 upstream.
Some drives report 0 as the number of written blocks when there are some blocks
recorded. Use device size in such case so that we can automagically mount such
media.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/udf/lowlevel.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/fs/udf/lowlevel.c
+++ b/fs/udf/lowlevel.c
@@ -56,7 +56,12 @@ unsigned long udf_get_last_block(struct
struct block_device *bdev = sb->s_bdev;
unsigned long lblock = 0;
- if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock))
+ /*
+ * ioctl failed or returned obviously bogus value?
+ * Try using the device size...
+ */
+ if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock) ||
+ lblock == 0)
lblock = bdev->bd_inode->i_size >> sb->s_blocksize_bits;
if (lblock)
next prev parent reply other threads:[~2009-09-16 22:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090916221320.283781925@mini.kroah.org>
2009-09-16 22:15 ` [patch 00/10] 2.6.27.35-stable review Greg KH
2009-09-16 22:13 ` [patch 01/10] binfmt_elf: fix PT_INTERP bss handling Greg KH
2009-09-16 22:13 ` [patch 02/10] powerpc/ps3: Workaround for flash memory I/O error Greg KH
2009-09-16 22:13 ` [patch 03/10] TPM: Fixup boot probe timeout for tpm_tis driver Greg KH
2009-09-16 22:13 ` Greg KH [this message]
2009-09-16 22:13 ` [patch 05/10] ALSA: cs46xx - Fix minimum period size Greg KH
2009-09-16 22:13 ` [patch 06/10] libata: fix off-by-one error in ata_tf_read_block() Greg KH
2009-09-16 22:13 ` [patch 07/10] powerpc/pseries: Fix to handle slb resize across migration Greg KH
2009-09-16 22:13 ` [patch 08/10] sound: oxygen: work around MCE when changing volume Greg KH
2009-09-16 22:13 ` [patch 09/10] Short write in nfsd becomes a full write to the client Greg KH
2009-09-16 22:13 ` [patch 10/10] nfsd: fix hung up of nfs client while sync write data to nfs server Greg KH
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