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

commit 938bb03d188a1e688fb0bcae49788f540193e80a uptream

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 0cc854eb9ccd23c002528455dc54216513f3359e..614f9ce548adc347ab3332e3f8e0c02cd38f6b7d 100644 (file)
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1298,6 +1298,7 @@ static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 
        int stat;
        struct request req;
+       u32 blocklen;
 
        ide_cd_init_rq(drive, &req);
 
@@ -1314,23 +1315,24 @@ 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;
 }