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charset="utf-8" According to the UAPI header (amd-apml.h), the CPUID extended function capability is indicated by bits [55:48], but the driver currently checks bits [63:56]. Adjust the driver to use bits [55:48] so that extended function capability is detected correctly. Fixes: bb13a84ed6b7 ("misc: amd-sbi: Add support for CPUID protocol") Cc: stable@vger.kernel.org Tested-by: Prathima L K Reviewed-by: Naveen Krishna Chatradhi Signed-off-by: Akshay Gupta --- Changes since v1: - Added Cc "stable@vger.kernel.org" in commit message drivers/misc/amd-sbi/rmi-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/amd-sbi/rmi-core.c b/drivers/misc/amd-sbi/rmi-cor= e.c index 1d4933c69dd2..d4238ebad3c6 100644 --- a/drivers/misc/amd-sbi/rmi-core.c +++ b/drivers/misc/amd-sbi/rmi-core.c @@ -48,7 +48,7 @@ /* CPUID MCAMSR mask & index */ #define CPUID_MCA_THRD_INDEX 32 #define CPUID_MCA_FUNC_MASK GENMASK(31, 0) -#define CPUID_EXT_FUNC_INDEX 56 +#define CPUID_EXT_FUNC_INDEX 48 =20 /* input for bulk write to CPUID protocol */ struct cpu_msr_indata { --=20 2.34.1