[PATCH 5/8] mmc: sdhci-of-aspeed: Fix null pointer

[Cool Lee]

Platform data might be null.

Signed-off-by: Cool Lee <cool_lee at aspeedtech.com>
---
 drivers/mmc/host/sdhci-of-aspeed.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci-of-aspeed.c b/drivers/mmc/host/sdhci-of-aspeed.c
index 2bdd93a3f91f..22dde915e51b 100644
--- a/drivers/mmc/host/sdhci-of-aspeed.c
+++ b/drivers/mmc/host/sdhci-of-aspeed.c
@@ -241,7 +241,7 @@ static void aspeed_sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 	struct sdhci_pltfm_host *pltfm_host;
 	unsigned long parent, bus;
 	struct aspeed_sdhci *sdhci;
-	int div;
+	int div = 1;
 	u16 clk;
 
 	pltfm_host = sdhci_priv(host);
@@ -257,6 +257,9 @@ static void aspeed_sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 	if (WARN_ON(clock > host->max_clk))
 		clock = host->max_clk;
 
+	if (sdhci->pdata)
+		div = sdhci->pdata->clk_div_start;
+
 	/*
 	 * Regarding the AST2600:
 	 *
@@ -273,7 +276,7 @@ static void aspeed_sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 	 * supporting the value 0 in (EMMC12C[7:6], EMMC12C[15:8]), and capture
 	 * the 0-value capability in clk_div_start.
 	 */
-	for (div = sdhci->pdata->clk_div_start; div < 256; div *= 2) {
+	for (; div < 256; div *= 2) {
 		bus = parent / div;
 		if (bus <= clock)
 			break;
-- 
2.34.1