[PATCH 4/9] mmc: sdhci: reduce code duplication for aligned buffer

[Masahiro Yamada]

The same code is run for both SDHCI_QUIRK_32BIT_DMA_ADDR and
define(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER).

Unify the code.

Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
---

 drivers/mmc/sdhci.c | 22 ++++++++--------------
 include/sdhci.h     |  2 ++
 2 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 18fbcb5f1864..b4713e7b9bba 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -140,27 +140,16 @@ static void sdhci_prepare_dma(struct sdhci_host *host, struct mmc_data *data,
 	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
 
 	if (host->flags & USE_SDMA) {
-		if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
-		    (host->start_addr & 0x7) != 0x0) {
+		if (host->force_align_buffer ||
+		    (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR &&
+		     (host->start_addr & 0x7) != 0x0)) {
 			*is_aligned = 0;
 			host->start_addr = (unsigned long)host->align_buffer;
 			if (data->flags != MMC_DATA_READ)
 				memcpy(host->align_buffer, data->src,
 				       trans_bytes);
 		}
-
-#if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
-		/*
-		 * Always use this bounce-buffer when
-		 * CONFIG_FIXED_SDHCI_ALIGNED_BUFFER is defined
-		 */
-		*is_aligned = 0;
-		host->start_addr = (unsigned long)host->align_buffer;
-		if (data->flags != MMC_DATA_READ)
-			memcpy(host->align_buffer, data->src, trans_bytes);
-#endif
 		sdhci_writel(host, host->start_addr, SDHCI_DMA_ADDRESS);
-
 	} else if (host->flags & (USE_ADMA | USE_ADMA64)) {
 		sdhci_prepare_adma_table(host, data);
 
@@ -627,6 +616,11 @@ static int sdhci_init(struct mmc *mmc)
 
 #if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
 	host->align_buffer = (void *)CONFIG_FIXED_SDHCI_ALIGNED_BUFFER;
+	/*
+	 * Always use this bounce-buffer when CONFIG_FIXED_SDHCI_ALIGNED_BUFFER
+	 * is defined.
+	 */
+	host->force_align_buffer = true;
 #else
 	if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) {
 		host->align_buffer = memalign(8, 512 * 1024);
diff --git a/include/sdhci.h b/include/sdhci.h
index 1358218270b8..7f8feefa450b 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -9,6 +9,7 @@
 #ifndef __SDHCI_HW_H
 #define __SDHCI_HW_H
 
+#include <linux/types.h>
 #include <asm/io.h>
 #include <mmc.h>
 #include <asm/gpio.h>
@@ -322,6 +323,7 @@ struct sdhci_host {
 
 	struct mmc_config cfg;
 	void *align_buffer;
+	bool force_align_buffer;
 	dma_addr_t start_addr;
 	int flags;
 #define USE_SDMA	(0x1 << 0)
-- 
2.17.1