diff options
| author | Seungwon Jeon <tgih.jun@samsung.com> | 2014-12-22 13:12:02 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-01-19 09:56:11 +0100 |
| commit | 1a25b1b4199c477f1538f63c1da2b998323e274e (patch) | |
| tree | d8f6e353befd8f5b94e6b09913783108a70f791b /drivers/mmc/host/dw_mmc.c | |
| parent | mmc: mxs-mmc: remove unneeded NULL check (diff) | |
| download | linux-1a25b1b4199c477f1538f63c1da2b998323e274e.tar.xz linux-1a25b1b4199c477f1538f63c1da2b998323e274e.zip | |
mmc: dw_mmc: fix the max_blk_count in IDMAC
Even though 1MB is reserved for descriptor table in IDMAC,
the dw_mmc host driver is allowed to receive only maximum
128KB block length in one request. This is caused by setting
improper max_blk_count. It needs to be e adjusted so that
descriptor table is used fully. It is found that the performance
is improved with the increased the max_blk_count.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/dw_mmc.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 64ea04274913..a1b80e515147 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -2332,9 +2332,9 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) #ifdef CONFIG_MMC_DW_IDMAC mmc->max_segs = host->ring_size; mmc->max_blk_size = 65536; - mmc->max_blk_count = host->ring_size; mmc->max_seg_size = 0x1000; - mmc->max_req_size = mmc->max_seg_size * mmc->max_blk_count; + mmc->max_req_size = mmc->max_seg_size * host->ring_size; + mmc->max_blk_count = mmc->max_req_size / 512; #else mmc->max_segs = 64; mmc->max_blk_size = 65536; /* BLKSIZ is 16 bits */ |