ide-cd: clean up cdrom_analyze_sense_data()

[bart: fix handling of bio_sectors(failed_command->bio) == 0]

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-cd.c

@@ -142,7 +142,6 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
 {
 	unsigned long sector;
 	unsigned long bio_sectors;
-	unsigned long valid;
 	struct cdrom_info *info = drive->driver_data;
 
 	if (!cdrom_log_sense(drive, failed_command, sense))
@@ -173,14 +172,12 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
 				 (sense->information[2] <<  8) |
 				 (sense->information[3]);
 
-			bio_sectors = bio_sectors(failed_command->bio);
-			if (bio_sectors < 4)
-				bio_sectors = 4;
 			if (drive->queue->hardsect_size == 2048)
 				/* device sector size is 2K */
 				sector <<= 2;
+
+			bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 			sector &= ~(bio_sectors - 1);
-			valid = (sector - failed_command->sector) << 9;
 
 			if (sector < get_capacity(info->disk) &&
 			    drive->probed_capacity - sector < 4 * 75)