From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: linux-ide@vger.kernel.org
Subject: [PATCH] ide: filter out invalid DMA xfer mode changes in HDIO_DRIVE_CMD ioctl handler
Date: Mon, 8 Jun 2009 22:23:13 +0200 [thread overview]
Message-ID: <200906082223.14128.bzolnier@gmail.com> (raw)
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
against ide-2.6.git/for-next
drivers/ide/ide-ioctls.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
Index: b/drivers/ide/ide-ioctls.c
===================================================================
--- a/drivers/ide/ide-ioctls.c
+++ b/drivers/ide/ide-ioctls.c
@@ -118,7 +118,6 @@ static int ide_cmd_ioctl(ide_drive_t *dr
u8 args[4], xfer_rate = 0;
struct ide_cmd cmd;
struct ide_taskfile *tf = &cmd.tf;
- u16 *id = drive->id;
if (NULL == (void *) arg) {
struct request *rq;
@@ -161,14 +160,10 @@ static int ide_cmd_ioctl(ide_drive_t *dr
if (tf->command == ATA_CMD_SET_FEATURES &&
tf->feature == SETFEATURES_XFER &&
- tf->nsect >= XFER_SW_DMA_0 &&
- (id[ATA_ID_UDMA_MODES] ||
- id[ATA_ID_MWDMA_MODES] ||
- id[ATA_ID_SWDMA_MODES])) {
- xfer_rate = args[1];
- if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
- printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
- "be set\n", drive->name);
+ tf->nsect >= XFER_SW_DMA_0) {
+ xfer_rate = ide_find_dma_mode(drive, XFER_UDMA_6);
+ if (xfer_rate != tf->nsect) {
+ err = -EINVAL;
goto abort;
}
}
reply other threads:[~2009-06-08 20:33 UTC|newest]
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