diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index bc645bbde1b1..b28aa0f0276b 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -559,37 +559,39 @@ static void sdhci_adma_table_post(struct sdhci_host *host, void *align; char *buffer; unsigned long flags; - bool has_unaligned; if (data->flags & MMC_DATA_READ) direction = DMA_FROM_DEVICE; else direction = DMA_TO_DEVICE; - /* Do a quick scan of the SG list for any unaligned mappings */ - has_unaligned = false; - for_each_sg(data->sg, sg, host->sg_count, i) - if (sg_dma_address(sg) & SDHCI_ADMA2_MASK) { - has_unaligned = true; - break; - } + if (data->flags & MMC_DATA_READ) { + bool has_unaligned = false; - if (has_unaligned && data->flags & MMC_DATA_READ) { - dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg, - data->sg_len, direction); + /* Do a quick scan of the SG list for any unaligned mappings */ + for_each_sg(data->sg, sg, host->sg_count, i) + if (sg_dma_address(sg) & SDHCI_ADMA2_MASK) { + has_unaligned = true; + break; + } - align = host->align_buffer; + if (has_unaligned) { + dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg, + data->sg_len, direction); - for_each_sg(data->sg, sg, host->sg_count, i) { - if (sg_dma_address(sg) & SDHCI_ADMA2_MASK) { - size = SDHCI_ADMA2_ALIGN - - (sg_dma_address(sg) & SDHCI_ADMA2_MASK); + align = host->align_buffer; - buffer = sdhci_kmap_atomic(sg, &flags); - memcpy(buffer, align, size); - sdhci_kunmap_atomic(buffer, &flags); + for_each_sg(data->sg, sg, host->sg_count, i) { + if (sg_dma_address(sg) & SDHCI_ADMA2_MASK) { + size = SDHCI_ADMA2_ALIGN - + (sg_dma_address(sg) & SDHCI_ADMA2_MASK); - align += SDHCI_ADMA2_ALIGN; + buffer = sdhci_kmap_atomic(sg, &flags); + memcpy(buffer, align, size); + sdhci_kunmap_atomic(buffer, &flags); + + align += SDHCI_ADMA2_ALIGN; + } } } } |