linux-kernel - [PATCH 13/63] ide-cd: fix DMA error handling in cdrom_newpc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 20 Dec 2007 02:02:06 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	linux-ide@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 13/63] ide-cd: fix DMA error handling in cdrom_newpc_intr()


Make cdrom_newpc_intr() match cdrom_{read,write}_intr() w.r.t.
handling DMA errors:

* disable DMA before cdrom_decode_status() call

* log the device name and the type of the request (read/write)

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
 drivers/ide/ide-cd.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1663,6 +1663,11 @@ static ide_startstop_t cdrom_newpc_intr(
 	if (dma) {
 		info->dma = 0;
 		dma_error = HWIF(drive)->ide_dma_end(drive);
+		if (dma_error) {
+			printk(KERN_ERR "%s: DMA %s error\n", drive->name,
+					rq_data_dir(rq) ? "write" : "read");
+			ide_dma_off(drive);
+		}
 	}
 
 	if (cdrom_decode_status(drive, 0, &stat))
@@ -1672,11 +1677,8 @@ static ide_startstop_t cdrom_newpc_intr(
 	 * using dma, transfer is complete now
 	 */
 	if (dma) {
-		if (dma_error) {
-			printk(KERN_ERR "ide-cd: dma error\n");
-			ide_dma_off(drive);
+		if (dma_error)
 			return ide_error(drive, "dma error", stat);
-		}
 
 		end_that_request_chunk(rq, 1, rq->data_len);
 		rq->data_len = 0;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/