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pci: msm: Fix out of bound error with find_next_bit()

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Existing api msm_pcie_write_reg_field() calls find_next_bit()
and results in a KASAN out of bounds error for taking in
the first parameter by typecasting as unsigned long type.
To avoid the KASAN error use __ffs() instead.

Change-Id: I9e155248e1233bbcb04ac5e2d1d6d512b3fa5387
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
This commit is contained in:
Siddartha Mohanadoss 2021-05-11 10:13:33 -07:00 • committed by Gerrit - the friendly Code Review server
commit b62866e622
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/controller/pci-msm.c
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@ -1395,7 +1395,7 @@ static void msm_pcie_write_reg(void __iomem *base, u32 offset, u32 value)
static void msm_pcie_write_reg_field(void __iomem *base, u32 offset,
const u32 mask, u32 val)
{
u32 shift = find_first_bit((void *)&mask, 32);
u32 shift = __ffs(mask);
u32 tmp = readl_relaxed(base + offset);
tmp &= ~mask; /* clear written bits */