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Date: Thu, 3 Dec 2020 17:57:44 -0800 From: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com> To: hdegoede@...hat.com, mgross@...ux.intel.com Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org, Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com> Subject: [PATCH 1/3] platform/x86: ISST: Check for unaligned mmio address The address should be aligned to 4 byte boundary. So send an error for unaligned address. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com> --- drivers/platform/x86/intel_speed_select_if/isst_if_mmio.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/platform/x86/intel_speed_select_if/isst_if_mmio.c b/drivers/platform/x86/intel_speed_select_if/isst_if_mmio.c index aa17fd7817f8..e7e9808a1aed 100644 --- a/drivers/platform/x86/intel_speed_select_if/isst_if_mmio.c +++ b/drivers/platform/x86/intel_speed_select_if/isst_if_mmio.c @@ -42,6 +42,9 @@ static long isst_if_mmio_rd_wr(u8 *cmd_ptr, int *write_only, int resume) if (io_reg->reg < 0x04 || io_reg->reg > 0xD0) return -EINVAL; + if (io_reg->reg % 4) + return -EINVAL; + if (io_reg->read_write && !capable(CAP_SYS_ADMIN)) return -EPERM; -- 2.25.4
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