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| author | Christoph Hellwig <hch@lst.de> | 2014-10-01 20:31:01 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-11-12 11:15:54 +0100 |
| commit | 678e27573237a0b065defdf99e5070c9b0c403c3 (patch) | |
| tree | f680a5244c9d1e1b63eeb4adf57c57c05a115636 /drivers/scsi/scsicam.c | |
| parent | 037e6d8654469051e6a75d64e6c2d6727130fe4c (diff) | |
| download | lwn-678e27573237a0b065defdf99e5070c9b0c403c3.tar.gz lwn-678e27573237a0b065defdf99e5070c9b0c403c3.zip | |
scsi: PC partition tables are little endian
As sparse correctly pointed out, scsi_partsize should use get_unaligned_le32
to read PC partition tables from disk, as they are little endian.
The result of this bug is that we returned incorrect geometries on big
endian systems when using the scsicam variant. Which probably doesn't
matter as only old x86 systems every cared about the geometry.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Diffstat (limited to 'drivers/scsi/scsicam.c')
| -rw-r--r-- | drivers/scsi/scsicam.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/scsicam.c b/drivers/scsi/scsicam.c index 92d24d6dcb39..910f4a7a3924 100644 --- a/drivers/scsi/scsicam.c +++ b/drivers/scsi/scsicam.c @@ -163,8 +163,8 @@ int scsi_partsize(unsigned char *buf, unsigned long capacity, end_head * end_sector + end_sector; /* This is the actual _sector_ number at the end */ - logical_end = get_unaligned(&largest->start_sect) - + get_unaligned(&largest->nr_sects); + logical_end = get_unaligned_le32(&largest->start_sect) + + get_unaligned_le32(&largest->nr_sects); /* This is for >1023 cylinders */ ext_cyl = (logical_end - (end_head * end_sector + end_sector)) |