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Subject[PATCH v2 1/2] platform/x86/amd/pmf: Do not use readl() for policy buffer access
Date
The policy buffer is allocated using normal memory allocation
functions, so readl() should not be used on it.

Compile-tested only.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
---
Changes since v1:
- get the full dword instead of only 8 bits
---
drivers/platform/x86/amd/pmf/tee-if.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
index 16973bebf55f..b3491268b6a0 100644
--- a/drivers/platform/x86/amd/pmf/tee-if.c
+++ b/drivers/platform/x86/amd/pmf/tee-if.c
@@ -249,8 +249,8 @@ static int amd_pmf_start_policy_engine(struct amd_pmf_dev *dev)
u32 cookie, length;
int res;

- cookie = readl(dev->policy_buf + POLICY_COOKIE_OFFSET);
- length = readl(dev->policy_buf + POLICY_COOKIE_LEN);
+ cookie = *(u32 *)(dev->policy_buf + POLICY_COOKIE_OFFSET);
+ length = *(u32 *)(dev->policy_buf + POLICY_COOKIE_LEN);

if (cookie != POLICY_SIGN_COOKIE || !length)
return -EINVAL;
--
2.39.2

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