From: Jisheng Zhang Date: Wed, 28 Jan 2015 11:54:12 +0000 (+0800) Subject: mmc: sdhci-pxav3: fix setting of pdata->clk_delay_cycles X-Git-Tag: Ubuntu-5.0.0-8.9~9974^2~16 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=14460dbaf7a5a0488963fdb8232ad5c8a8cca7b7;p=mirror_ubuntu-disco-kernel.git mmc: sdhci-pxav3: fix setting of pdata->clk_delay_cycles Current code checks "clk_delay_cycles > 0" to know whether the optional "mrvl,clk_delay_cycles" is set or not. But of_property_read_u32() doesn't touch clk_delay_cycles if the property is not set. And type of clk_delay_cycles is u32, so we may always set pdata->clk_delay_cycles as a random value. This patch fix this problem by check the return value of of_property_read_u32() to know whether the optional clk-delay-cycles is set or not. Signed-off-by: Jisheng Zhang Cc: # v3.6+ Signed-off-by: Ulf Hansson --- diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c index c5db5d271ee7..f1c6362648c1 100644 --- a/drivers/mmc/host/sdhci-pxav3.c +++ b/drivers/mmc/host/sdhci-pxav3.c @@ -268,8 +268,8 @@ static struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev) if (!pdata) return NULL; - of_property_read_u32(np, "mrvl,clk-delay-cycles", &clk_delay_cycles); - if (clk_delay_cycles > 0) + if (!of_property_read_u32(np, "mrvl,clk-delay-cycles", + &clk_delay_cycles)) pdata->clk_delay_cycles = clk_delay_cycles; return pdata;