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ide-cd: fix endianity for the error message in cdrom_read_capacity 

Aesthetic regards aside, commit e8e7b9eb11
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>
This commit is contained in:
Petr Tesarik 2008-08-05 18:17:02 +02:00 committed by Bartlomiej Zolnierkiewicz
parent c5bfc3757f
commit 938bb03d18
1 changed files with 10 additions and 8 deletions
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18
drivers/ide/ide-cd.c
View File

@ -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;
}