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

commit 938bb03d uptream

Aesthetic regards aside, commit e8e7b9eb
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>

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;
 }