From: Russell King Date: Tue, 11 Feb 2014 17:11:04 +0000 (+0000) Subject: Fix uses of dma_max_pfn() when converting to a limiting address X-Git-Tag: v4.0~2280^2~7 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e83b366487b5582274374f8226e489cb214ae5a6;p=platform%2Fkernel%2Flinux-amlogic.git Fix uses of dma_max_pfn() when converting to a limiting address 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 Reviewed-by: Ulf Hansson Signed-off-by: Russell King --- diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index 357bbc5..3e049c1 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 7bd7f0d..62ec84b 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; }