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linux-sg2042
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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: Borislav Petkov <petkovbb@gmail.com>
[bart: backport to Linus' tree]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2009-03-13 21:16:12 +01:00 committed by Bartlomiej Zolnierkiewicz
parent 041b62374c
commit 3eb76c1ccd
2 changed files with 16 additions and 2 deletions
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12
drivers/ide/ide-atapi.c
View File

@ -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;

6
drivers/ide/ide-floppy.c
View File

@ -327,8 +327,10 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
return ide_stopped;
}
ide_init_sg_cmd(drive, rq);
ide_map_sg(drive, rq);
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;