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authorRay Jui <rjui@broadcom.com>2015-06-29 14:30:10 -0700
committerStephen Boyd <sboyd@codeaurora.org>2015-07-02 09:51:09 -0700
commit69916d96094e1e16567c5f25515a13ed2896c730 (patch)
tree7b756558d35f725dc8dd31c95c6edd383f07f908 /drivers/clk
parent45a481c2176f6acca2efb6477c6018b2c3e3c60f (diff)
downloadlinux-69916d96094e1e16567c5f25515a13ed2896c730.tar.bz2
clk: iproc: fix bit manipulation arithmetic
A 32-bit variable should be type casted to 64-bit before arithmetic operation and assigning it to a 64-bit variable Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Ray Jui <rjui@broadcom.com> Fixes: 5fe225c105fd ("clk: iproc: add initial common clock support") Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/bcm/clk-iproc-pll.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/clk/bcm/clk-iproc-pll.c b/drivers/clk/bcm/clk-iproc-pll.c
index a8d971b820b0..2dda4e8295a9 100644
--- a/drivers/clk/bcm/clk-iproc-pll.c
+++ b/drivers/clk/bcm/clk-iproc-pll.c
@@ -366,7 +366,7 @@ static unsigned long iproc_pll_recalc_rate(struct clk_hw *hw,
val = readl(pll->pll_base + ctrl->ndiv_int.offset);
ndiv_int = (val >> ctrl->ndiv_int.shift) &
bit_mask(ctrl->ndiv_int.width);
- ndiv = ndiv_int << ctrl->ndiv_int.shift;
+ ndiv = (u64)ndiv_int << ctrl->ndiv_int.shift;
if (ctrl->flags & IPROC_CLK_PLL_HAS_NDIV_FRAC) {
val = readl(pll->pll_base + ctrl->ndiv_frac.offset);
@@ -374,7 +374,8 @@ static unsigned long iproc_pll_recalc_rate(struct clk_hw *hw,
bit_mask(ctrl->ndiv_frac.width);
if (ndiv_frac != 0)
- ndiv = (ndiv_int << ctrl->ndiv_int.shift) | ndiv_frac;
+ ndiv = ((u64)ndiv_int << ctrl->ndiv_int.shift) |
+ ndiv_frac;
}
val = readl(pll->pll_base + ctrl->pdiv.offset);