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path: root/drivers/ide/ide-cd.c
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Diffstat (limited to 'drivers/ide/ide-cd.c')
-rw-r--r--drivers/ide/ide-cd.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 239557f8920..accb53b85ba 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1164,13 +1164,12 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
struct request_queue *q = drive->queue;
unsigned int alignment;
- unsigned long addr;
- unsigned long stack_mask = ~(THREAD_SIZE - 1);
+ char *buf;
if (rq->bio)
- addr = (unsigned long)bio_data(rq->bio);
+ buf = bio_data(rq->bio);
else
- addr = (unsigned long)rq->data;
+ buf = rq->data;
info->dma = drive->using_dma;
@@ -1181,11 +1180,8 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
* separate masks.
*/
alignment = queue_dma_alignment(q) | q->dma_pad_mask;
- if (addr & alignment || rq->data_len & alignment)
- info->dma = 0;
-
- if (!((addr & stack_mask) ^
- ((unsigned long)current->stack & stack_mask)))
+ if ((unsigned long)buf & alignment || rq->data_len & alignment
+ || object_is_on_stack(buf))
info->dma = 0;
}
}