ide-scsi: fix DRQ checking for DMA transfers in idescsi_pc_intr()
If DRQ bit of Status Register is not cleared it is an error condition
and should be handled accordingly (disable DMA + reset the device).
Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 2553ef4..e67cf8a 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -388,7 +388,6 @@
return ide_stopped;
}
if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
- pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
#if IDESCSI_DEBUG_LOG
printk ("ide-scsi: %s: DMA complete\n", drive->name);
#endif /* IDESCSI_DEBUG_LOG */
@@ -404,12 +403,20 @@
if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
printk(KERN_INFO "Packet command completed, %d bytes"
" transferred\n", pc->xferred);
+ pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
local_irq_enable_in_hardirq();
if (stat & ERR_STAT)
rq->errors++;
idescsi_end_request (drive, 1, 0);
return ide_stopped;
}
+ if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
+ pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
+ printk(KERN_ERR "%s: The device wants to issue more interrupts "
+ "in DMA mode\n", drive->name);
+ ide_dma_off(drive);
+ return ide_do_reset(drive);
+ }
bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
hwif->INB(hwif->io_ports.lbam_addr);
ireason = hwif->INB(hwif->io_ports.nsect_addr);