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authorPetr Tesarik <ptesarik@suse.cz>2008-08-05 18:17:02 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-08-05 18:17:02 +0200
commit938bb03d188a1e688fb0bcae49788f540193e80a (patch)
tree75cbe491a4537acab55b37e24384f6a7915b8e73 /drivers/ide
parentc5bfc3757f1d843a8e1261840c1f53c5062f8e92 (diff)
ide-cd: fix endianity for the error message in cdrom_read_capacity
Aesthetic regards aside, commit e8e7b9eb11c34ee18bde8b7011af41938d1ad667 still leaves a bug in the error message, because it uses the unconverted big-endian value for printk. Fix this by using a local variable in machine byte order. The result is correct, more readable, and also produces slightly shorter code on i386. Signed-off-by: Petr Tesarik <ptesarik@suse.cz> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Jan Kara <jack@suse.cz> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> Acked-by: Borislav Petkov <petkovbb@gmail.com> [bart: __u32 -> u32] Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide')
-rw-r--r--drivers/ide/ide-cd.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index e19caa1453a..89a112d513a 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1307,6 +1307,7 @@ static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
int stat;
unsigned char cmd[BLK_MAX_CDB];
unsigned len = sizeof(capbuf);
+ u32 blocklen;
memset(cmd, 0, BLK_MAX_CDB);
cmd[0] = GPCMD_READ_CDVD_CAPACITY;
@@ -1319,23 +1320,24 @@ static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
/*
* Sanity check the given block size
*/
- switch (capbuf.blocklen) {
- case __constant_cpu_to_be32(512):
- case __constant_cpu_to_be32(1024):
- case __constant_cpu_to_be32(2048):
- case __constant_cpu_to_be32(4096):
+ blocklen = be32_to_cpu(capbuf.blocklen);
+ switch (blocklen) {
+ case 512:
+ case 1024:
+ case 2048:
+ case 4096:
break;
default:
printk(KERN_ERR "%s: weird block size %u\n",
- drive->name, capbuf.blocklen);
+ drive->name, blocklen);
printk(KERN_ERR "%s: default to 2kb block size\n",
drive->name);
- capbuf.blocklen = __constant_cpu_to_be32(2048);
+ blocklen = 2048;
break;
}
*capacity = 1 + be32_to_cpu(capbuf.lba);
- *sectors_per_frame = be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
+ *sectors_per_frame = blocklen >> SECTOR_BITS;
return 0;
}