ide: check rq->cmd_type in drive_cmd_intr()

drive_cmd_intr() is used by both REQ_TYPE_ATA_CMD and REQ_TYPE_ATA_TASK
but commands using PIO-in protocol are valid only for REQ_TYPE_ATA_CMD
(&args[4] in case of REQ_TYPE_ATA_TASK points to a value for IDE_LCYL_REG
register instead of the data buffer).  This fix allows REQ_TYPE_ATA_TASK
commands to use non-zero values for IDE_SECTOR_REG (args[3]).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index c89f0d3058e9..e04967ac25b6 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -654,7 +654,8 @@ static ide_startstop_t drive_cmd_intr (ide_drive_t *drive)
         int retries = 10;
 
         local_irq_enable_in_hardirq();
-        if ((stat & DRQ_STAT) && args && args[3]) {
+        if (rq->cmd_type == REQ_TYPE_ATA_CMD &&
+            (stat & DRQ_STAT) && args && args[3]) {
                 u8 io_32bit = drive->io_32bit;
                 drive->io_32bit = 0;
                 hwif->ata_input_data(drive, &args[4], args[3] * SECTOR_WORDS);