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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-06-23 11:35:51 +0000
committerDavid S. Miller <davem@davemloft.net>2009-08-07 10:43:00 -0700
commit665d66e8fad60a5a162c4615f27f916ad1a6d567 (patch)
tree2e4f699f4fec1ca4010a39b9dd787fbd5f03b44d /drivers/ide/ide-proc.c
parentfa56d4cb4022c8b313c3b99236e1b87effc3655b (diff)
downloadop-kernel-dev-665d66e8fad60a5a162c4615f27f916ad1a6d567.zip
op-kernel-dev-665d66e8fad60a5a162c4615f27f916ad1a6d567.tar.gz
ide: fix races in handling of user-space SET XFER commands
* Make cmd->tf_flags field 'u16' and add IDE_TFLAG_SET_XFER taskfile flag. * Update ide_finish_cmd() to set xfer / re-read id if the new flag is set. * Convert set_xfer_rate() (write handler for /proc/ide/hd?/current_speed) and ide_cmd_ioctl() (HDIO_DRIVE_CMD ioctl handler) to use the new flag. * Remove no longer needed disable_irq_nosync() + enable_irq() from ide_config_drive_speed(). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ide/ide-proc.c')
-rw-r--r--drivers/ide/ide-proc.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c
index 3242698..021de41 100644
--- a/drivers/ide/ide-proc.c
+++ b/drivers/ide/ide-proc.c
@@ -195,7 +195,6 @@ ide_devset_get(xfer_rate, current_speed);
static int set_xfer_rate (ide_drive_t *drive, int arg)
{
struct ide_cmd cmd;
- int err;
if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
return -EINVAL;
@@ -206,14 +205,9 @@ static int set_xfer_rate (ide_drive_t *drive, int arg)
cmd.tf.nsect = (u8)arg;
cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT;
cmd.valid.in.tf = IDE_VALID_NSECT;
+ cmd.tf_flags = IDE_TFLAG_SET_XFER;
- err = ide_no_data_taskfile(drive, &cmd);
-
- if (!err) {
- ide_set_xfer_rate(drive, (u8) arg);
- ide_driveid_update(drive);
- }
- return err;
+ return ide_no_data_taskfile(drive, &cmd);
}
ide_devset_rw(current_speed, xfer_rate);
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