[PATCH] mmc: sdhci: use lower/upper_32_bits() macros for DMA addresses

[Masahiro Yamada]

Currently, the DMA addresses are casted to (u64) for the upper 32bits
to avoid "right shift count >= width of type" warning.

<linux/kernel.h> provides macros to address this, and the macro names
are self-documenting.

Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
---

 drivers/mmc/host/sdhci.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index a5dc5aae973e..07144a195a9f 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -668,10 +668,10 @@ void sdhci_adma_write_desc(struct sdhci_host *host, void 
**desc,
        /* 32-bit and 64-bit descriptors have these members in same position */
        dma_desc->cmd = cpu_to_le16(cmd);
        dma_desc->len = cpu_to_le16(len);
-       dma_desc->addr_lo = cpu_to_le32((u32)addr);
+       dma_desc->addr_lo = cpu_to_le32(lower_32_bits(addr));
 
        if (host->flags & SDHCI_USE_64_BIT_DMA)
-               dma_desc->addr_hi = cpu_to_le32((u64)addr >> 32);
+               dma_desc->addr_hi = cpu_to_le32(upper_32_bits(addr));
 
        *desc += host->desc_sz;
 }
@@ -827,9 +827,10 @@ static dma_addr_t sdhci_sdma_address(struct sdhci_host 
*host)
 static void sdhci_set_sdma_addr(struct sdhci_host *host, dma_addr_t addr)
 {
        if (host->v4_mode) {
-               sdhci_writel(host, addr, SDHCI_ADMA_ADDRESS);
+               sdhci_writel(host, lower_32_bits(addr), SDHCI_ADMA_ADDRESS);
                if (host->flags & SDHCI_USE_64_BIT_DMA)
-                       sdhci_writel(host, (u64)addr >> 32, 
SDHCI_ADMA_ADDRESS_HI);
+                       sdhci_writel(host, upper_32_bits(addr),
+                                    SDHCI_ADMA_ADDRESS_HI);
        } else {
                sdhci_writel(host, addr, SDHCI_DMA_ADDRESS);
        }
@@ -1096,10 +1097,11 @@ static void sdhci_prepare_data(struct sdhci_host *host, 
struct mmc_command *cmd)
                } else if (host->flags & SDHCI_USE_ADMA) {
                        sdhci_adma_table_pre(host, data, sg_cnt);
 
-                       sdhci_writel(host, host->adma_addr, SDHCI_ADMA_ADDRESS);
+                       sdhci_writel(host, lower_32_bits(host->adma_addr),
+                                    SDHCI_ADMA_ADDRESS);
                        if (host->flags & SDHCI_USE_64_BIT_DMA)
                                sdhci_writel(host,
-                                            (u64)host->adma_addr >> 32,
+                                            upper_32_bits(host->adma_addr),
                                             SDHCI_ADMA_ADDRESS_HI);
                } else {
                        WARN_ON(sg_cnt != 1);
-- 
2.17.1