diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-02-11 17:11:04 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-31 10:05:15 -0700 |
| commit | 7357468bebeacb3742f4c3a3fd0a967edd9898c8 (patch) | |
| tree | ace457c1c381b737b0c0ed430b960956116c8faa | |
| parent | 5162831f478f1b4e1dd2332754c74e8f96d7a6f0 (diff) | |
Fix uses of dma_max_pfn() when converting to a limiting address
commit e83b366487b5582274374f8226e489cb214ae5a6 upstream.
We must use a 64-bit for this, otherwise overflowed bits get lost, and
that can result in a lower than intended value set.
Fixes: 8e0cb8a1f6ac ("ARM: 7797/1: mmc: Use dma_max_pfn(dev) helper for bounce_limit calculations")
Fixes: 7d35496dd982 ("ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations")
Tested-Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/mmc/card/queue.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index 357bbc54fe4..3e049c13429 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -197,7 +197,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, struct mmc_queue_req *mqrq_prev = &mq->mqrq[1]; if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask) - limit = dma_max_pfn(mmc_dev(host)) << PAGE_SHIFT; + limit = (u64)dma_max_pfn(mmc_dev(host)) << PAGE_SHIFT; mq->card = card; mq->queue = blk_init_queue(mmc_request_fn, lock); diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 7bd7f0d5f05..62ec84b42e3 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1684,7 +1684,7 @@ u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost) host_dev = scsi_get_device(shost); if (host_dev && host_dev->dma_mask) - bounce_limit = dma_max_pfn(host_dev) << PAGE_SHIFT; + bounce_limit = (u64)dma_max_pfn(host_dev) << PAGE_SHIFT; return bounce_limit; } |