[PATCH 3.12 020/175] mmc: sdhci-pxav3: fix setting of pdata->clk_delay_cycles
From: Jiri Slaby
Date: Tue Mar 17 2015 - 05:42:31 EST
From: Jisheng Zhang <jszhang@xxxxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 14460dbaf7a5a0488963fdb8232ad5c8a8cca7b7 upstream.
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 <jszhang@xxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/mmc/host/sdhci-pxav3.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
index 793dacd3b841..561c6b4907a1 100644
--- a/drivers/mmc/host/sdhci-pxav3.c
+++ b/drivers/mmc/host/sdhci-pxav3.c
@@ -201,8 +201,8 @@ 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;
--
2.3.0
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