linux-kernel - [PATCH 6/6] ide-atapi: teach ide atapi about drive->waiting_for

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

Date:	Thu,  4 Dec 2008 07:43:29 +0100
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	<bzolnier@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Borislav Petkov <petkovbb@...il.com>
Subject: [PATCH 6/6] ide-atapi: teach ide atapi about drive->waiting_for_dma

In addition, we wait for DRQ to be asserted by repeatedly polling
device status no matter what DRQ type each device implements.

Signed-off-by: Borislav Petkov <petkovbb@...il.com>
---
 drivers/ide/ide-atapi.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index bb867a0..a43bed3 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -543,6 +543,11 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
 		return startstop;
 	}
 
+	if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
+		if (drive->dma)
+			drive->waiting_for_dma = 1;
+	}
+
 	ireason = ide_read_ireason(drive);
 	if (drive->media == ide_tape &&
 	    (drive->dev_flags & IDE_DFLAG_SCSI) == 0)
@@ -639,6 +644,8 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout)
 
 	/* Issue the packet command */
 	if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
+		if (drive->dma)
+			drive->waiting_for_dma = 0;
 		ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc,
 				    timeout, expiry);
 		return ide_started;
-- 
1.6.0.4

--
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/