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-rw-r--r--arch/arm/plat-s3c24xx/s3c2443-clock.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/arch/arm/plat-s3c24xx/s3c2443-clock.c b/arch/arm/plat-s3c24xx/s3c2443-clock.c
index fea3d5c0252e..31f97f1bb363 100644
--- a/arch/arm/plat-s3c24xx/s3c2443-clock.c
+++ b/arch/arm/plat-s3c24xx/s3c2443-clock.c
@@ -179,11 +179,16 @@ static unsigned long s3c2443_armclk_roundrate(struct clk *clk,
unsigned div;
int ptr;
+ if (!nr_armdiv)
+ return -EINVAL;
+
for (ptr = 0; ptr < nr_armdiv; ptr++) {
div = armdiv[ptr];
- calc = parent / div;
- if (calc <= rate && div < best)
- best = div;
+ if (div) {
+ calc = parent / div;
+ if (calc <= rate && div < best)
+ best = div;
+ }
}
return parent / best;
@@ -195,6 +200,9 @@ static unsigned long s3c2443_armclk_getrate(struct clk *clk)
unsigned long clkcon0;
int val;
+ if (!nr_armdiv || !armdivmask)
+ return -EINVAL;
+
clkcon0 = __raw_readl(S3C2443_CLKDIV0);
clkcon0 &= armdivmask;
val = clkcon0 >> S3C2443_CLKDIV0_ARMDIV_SHIFT;
@@ -211,12 +219,17 @@ static int s3c2443_armclk_setrate(struct clk *clk, unsigned long rate)
int ptr;
int val = -1;
+ if (!nr_armdiv || !armdivmask)
+ return -EINVAL;
+
for (ptr = 0; ptr < nr_armdiv; ptr++) {
div = armdiv[ptr];
- calc = parent / div;
- if (calc <= rate && div < best) {
- best = div;
- val = ptr;
+ if (div) {
+ calc = parent / div;
+ if (calc <= rate && div < best) {
+ best = div;
+ val = ptr;
+ }
}
}