diff options
| author |   Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2018-02-14 18:40:12 +0900 |
|---|---|---|
| committer |   Vinod Koul <vinod.koul@intel.com> | 2018-02-27 20:34:38 +0530 |
| commit | d716d9b702bb759dd6fb50804f10a174bd156d71 (patch) | |
| tree | b43a03870b1e9aa9adb0e1e217f34fee23a26394 /drivers | |
| parent | Linux 4.16-rc1 (diff) | |
| download | linux-dev-d716d9b702bb759dd6fb50804f10a174bd156d71.tar.xz linux-dev-d716d9b702bb759dd6fb50804f10a174bd156d71.zip | |
dmaengine: rcar-dmac: fix max_chunk_size for R-Car Gen3
According to R-Car Gen3 Rev.0.80 manual, the DMATCR can be set to
16,777,215 as maximum. So, this patch fixes the max_chunk_size for
safety on all of SoCs. Otherwise, a system may hang if the DMATCR
is set to 0 on R-Car Gen3.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/sh/rcar-dmac.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index e3ff162c03fc..d0cacdb0713e 100644 --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -917,7 +917,7 @@ rcar_dmac_chan_prep_sg(struct rcar_dmac_chan *chan, struct scatterlist *sgl, rcar_dmac_chan_configure_desc(chan, desc); - max_chunk_size = (RCAR_DMATCR_MASK + 1) << desc->xfer_shift; + max_chunk_size = RCAR_DMATCR_MASK << desc->xfer_shift; /* * Allocate and fill the transfer chunk descriptors. We own the only |