diff options
| -rw-r--r-- | drivers/staging/mt7621-mmc/sd.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/staging/mt7621-mmc/sd.c b/drivers/staging/mt7621-mmc/sd.c index ff01872ab972..e346167754bd 100644 --- a/drivers/staging/mt7621-mmc/sd.c +++ b/drivers/staging/mt7621-mmc/sd.c @@ -591,8 +591,6 @@ static void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma, struct bd *bd; u32 j; - BUG_ON(sglen > MAX_BD_NUM); /* not support currently */ - gpd = dma->gpd; bd = dma->bd; @@ -681,6 +679,13 @@ static int msdc_do_request(struct mmc_host *mmc, struct mmc_request *mrq) data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len, mmc_get_dma_dir(data)); + + if (data->sg_count == 0) { + dev_err(mmc_dev(host->mmc), "failed to map DMA for transfer\n"); + data->error = -ENOMEM; + goto done; + } + msdc_dma_setup(host, &host->dma, data->sg, data->sg_count); |