mmc: mmci_sdmmc: fix DMA API warning max segment size

Turning on CONFIG_DMA_API_DEBUG_SG results in the following warning:
WARNING: CPU: 1 PID: 85 at kernel/dma/debug.c:1302
debug_dma_map_sg+0x2a0/0x3cc mmci-pl18x 58005000.sdmmc: DMA-API: mapping sg
segment longer than device claims to support [len=126976] [max=65536]

dma api debug checks and compares the segment size to dma_get_max_seg_size
(dev->dma_parms->max_segment_size), the sdmmc variant has an internal DMA
and should define its max_segment_size constraint to avoid this warning.

This Patch defines the dev->dma_parms->max_segment_size with the constraint
already set for mmc core (host->mmc->max_seg_size).

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Link: https://lore.kernel.org/r/20200526155103.12514-3-ludovic.barre@st.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ludovic Barre 2020-05-26 17:51:03 +02:00 committed by Ulf Hansson
parent fe8d33bd33
commit 942d5e7bae

View File

@ -119,20 +119,19 @@ static void sdmmc_idma_unprep_data(struct mmci_host *host,
static int sdmmc_idma_setup(struct mmci_host *host) static int sdmmc_idma_setup(struct mmci_host *host)
{ {
struct sdmmc_idma *idma; struct sdmmc_idma *idma;
struct device *dev = mmc_dev(host->mmc);
idma = devm_kzalloc(mmc_dev(host->mmc), sizeof(*idma), GFP_KERNEL); idma = devm_kzalloc(dev, sizeof(*idma), GFP_KERNEL);
if (!idma) if (!idma)
return -ENOMEM; return -ENOMEM;
host->dma_priv = idma; host->dma_priv = idma;
if (host->variant->dma_lli) { if (host->variant->dma_lli) {
idma->sg_cpu = dmam_alloc_coherent(mmc_dev(host->mmc), idma->sg_cpu = dmam_alloc_coherent(dev, SDMMC_LLI_BUF_LEN,
SDMMC_LLI_BUF_LEN,
&idma->sg_dma, GFP_KERNEL); &idma->sg_dma, GFP_KERNEL);
if (!idma->sg_cpu) { if (!idma->sg_cpu) {
dev_err(mmc_dev(host->mmc), dev_err(dev, "Failed to alloc IDMA descriptor\n");
"Failed to alloc IDMA descriptor\n");
return -ENOMEM; return -ENOMEM;
} }
host->mmc->max_segs = SDMMC_LLI_BUF_LEN / host->mmc->max_segs = SDMMC_LLI_BUF_LEN /
@ -143,7 +142,7 @@ static int sdmmc_idma_setup(struct mmci_host *host)
host->mmc->max_seg_size = host->mmc->max_req_size; host->mmc->max_seg_size = host->mmc->max_req_size;
} }
return 0; return dma_set_max_seg_size(dev, host->mmc->max_seg_size);
} }
static int sdmmc_idma_start(struct mmci_host *host, unsigned int *datactrl) static int sdmmc_idma_start(struct mmci_host *host, unsigned int *datactrl)