linux-kernel - Re: [PATCH 3/6] IDE: ide-cd: fix test unsigned var

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Date:	Thu, 17 Apr 2008 05:51:46 +0200
From:	Roel Kluin <12o3l@...cali.nl>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
CC:	linux-ide@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
	Borislav Petkov <petkovbb@...il.com>
Subject: Re: [PATCH 3/6] IDE: ide-cd: fix test unsigned var < 0

Bartlomiej Zolnierkiewicz wrote:
> Hi,
> 
> On Wednesday 16 April 2008, Roel Kluin wrote:
>> Is this the right fix in this case?
> 
> Yes, but it seems that 'valid' is only written to
> so it may be as well removed completely.
> 
> Care to update the patch?
> 
> Thanks,
> Bart

how about this?

Roel

---
Clean up cdrom_analyze_sense_data()

Signed-off-by: Roel Kluin <12o3l@...cali.nl>
---
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index a60f5df..a5f3beb 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -143,8 +143,6 @@ void cdrom_analyze_sense_data(ide_drive_t *drive,
 			      struct request_sense *sense)
 {
 	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))
@@ -174,13 +172,9 @@ 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)
 				sector <<= 2;	/* Device sector size is 2K */
-			sector &= ~(bio_sectors -1);
-			valid = (sector - failed_command->sector) << 9;
+			sector &= ~(max(bio_sectors(failed_command->bio) - 1, 3));
 
 			if (sector < get_capacity(info->disk) &&
 				drive->probed_capacity - sector < 4 * 75) {

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