mmc: sdhci-pxa: Check pdata before using its members

Signed-off-by: Tanmay Upadhyay <tanmay.upadhyay@einfochips.com>
Acked-by: Zhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/host/sdhci-pxav2.c b/drivers/mmc/host/sdhci-pxav2.c
index 38f5899..1114fe2 100644 (file)
--- a/drivers/mmc/host/sdhci-pxav2.c
+++ b/drivers/mmc/host/sdhci-pxav2.c
@@ -59,7 +59,7 @@ static void pxav2_set_private_registers(struct sdhci_host *host, u8 mask)
                 * tune timing of read data/command when crc error happen
                 * no performance impact
                 */
-               if (pdata->clk_delay_sel == 1) {
+               if (pdata && pdata->clk_delay_sel == 1) {
                        tmp = readw(host->ioaddr + SD_CLOCK_BURST_SIZE_SETUP);
 
                        tmp &= ~(SDCLK_DELAY_MASK << SDCLK_DELAY_SHIFT);
@@ -71,7 +71,7 @@ static void pxav2_set_private_registers(struct sdhci_host *host, u8 mask)
                        writew(tmp, host->ioaddr + SD_CLOCK_BURST_SIZE_SETUP);
                }
 
-               if (pdata->flags & PXA_FLAG_ENABLE_CLOCK_GATING) {
+               if (pdata && (pdata->flags & PXA_FLAG_ENABLE_CLOCK_GATING)) {
                        tmp = readw(host->ioaddr + SD_FIFO_PARAM);
                        tmp &= ~CLK_GATE_SETTING_BITS;
                        writew(tmp, host->ioaddr + SD_FIFO_PARAM);