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mmc: sdhci: prepare DMA address/size quirk handling consolidation 

Prepare to consolidate the DMA address/size quirk handling into one
single loop.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Russell King 2016-01-26 13:41:09 +00:00 committed by Ulf Hansson
parent add8913d5d
commit a0eaf0f93f
1 changed files with 15 additions and 13 deletions
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28
drivers/mmc/host/sdhci.c
View File

@ -733,23 +733,24 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
* scatterlist.
*/
if (host->flags & SDHCI_REQ_USE_DMA) {
int broken, i;
struct scatterlist *sg;
unsigned int length_mask;
int i;
broken = 0;
length_mask = 0;
if (host->flags & SDHCI_USE_ADMA) {
if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
broken = 1;
length_mask = 3;
} else {
if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE)
broken = 1;
length_mask = 3;
}
if (unlikely(broken)) {
if (unlikely(length_mask)) {
for_each_sg(data->sg, sg, data->sg_len, i) {
if (sg->length & 0x3) {
if (sg->length & length_mask) {
DBG("Reverting to PIO because of transfer size (%d)\n",
sg->length);
sg->length);
host->flags &= ~SDHCI_REQ_USE_DMA;
break;
}
@ -762,10 +763,11 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
* translation to device address space.
*/
if (host->flags & SDHCI_REQ_USE_DMA) {
int broken, i;
struct scatterlist *sg;
unsigned int offset_mask;
int i;
broken = 0;
offset_mask = 0;
if (host->flags & SDHCI_USE_ADMA) {
/*
* As we use 3 byte chunks to work around
@ -773,15 +775,15 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
* quirk.
*/
if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
broken = 1;
offset_mask = 3;
} else {
if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR)
broken = 1;
offset_mask = 3;
}
if (unlikely(broken)) {
if (unlikely(offset_mask)) {
for_each_sg(data->sg, sg, data->sg_len, i) {
if (sg->offset & 0x3) {
if (sg->offset & offset_mask) {
DBG("Reverting to PIO because of bad alignment\n");
host->flags &= ~SDHCI_REQ_USE_DMA;
break;