Commit 3eb76c1c authored by Borislav Petkov's avatar Borislav Petkov Committed by Bartlomiej Zolnierkiewicz
Browse files

ide-floppy: do not map dataless cmds to an sg 



since it fails the virt_to_page() translation check with DEBUG_VIRTUAL
enabled.

Signed-off-by: default avatarBorislav Petkov <petkovbb@gmail.com>
[bart: backport to Linus' tree]
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 041b6237

drivers/ide/ide-atapi.c

+12 −0
Original line number Diff line number Diff line
@@ -140,6 +140,12 @@ static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk, 
	rq->cmd_flags |= REQ_PREEMPT;

	rq->buffer = (char *)pc;

	rq->rq_disk = disk;



	if (pc->req_xfer) {

		rq->data = pc->buf;

		rq->data_len = pc->req_xfer;

	}



	memcpy(rq->cmd, pc->c, 12);

	if (drive->media == ide_tape)

		rq->cmd[13] = REQ_IDETAPE_PC1;
@@ -159,6 +165,12 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, 
	rq = blk_get_request(drive->queue, READ, __GFP_WAIT);

	rq->cmd_type = REQ_TYPE_SPECIAL;

	rq->buffer = (char *)pc;



	if (pc->req_xfer) {

		rq->data = pc->buf;

		rq->data_len = pc->req_xfer;

	}



	memcpy(rq->cmd, pc->c, 12);

	if (drive->media == ide_tape)

		rq->cmd[13] = REQ_IDETAPE_PC1;

drivers/ide/ide-floppy.c

+4 −2
Original line number Diff line number Diff line
@@ -327,8 +327,10 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive, 
		return ide_stopped;

	}



	if (blk_fs_request(rq) || pc->req_xfer) {

		ide_init_sg_cmd(drive, rq);

		ide_map_sg(drive, rq);

	}



	pc->sg = hwif->sg_table;

	pc->sg_cnt = hwif->sg_nents;