From f99afd08a45fbbd9ce35a7624ffd1d850a1906c0 Mon Sep 17 00:00:00 2001 From: Tom Lendacky Date: Mon, 17 Jul 2017 16:10:14 -0500 Subject: efi: Update efi_mem_type() to return an error rather than 0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The efi_mem_type() function currently returns a 0, which maps to EFI_RESERVED_TYPE, if the function is unable to find a memmap entry for the supplied physical address. Returning EFI_RESERVED_TYPE implies that a memmap entry exists, when it doesn't. Instead of returning 0, change the function to return a negative error value when no memmap entry is found. Signed-off-by: Tom Lendacky Reviewed-by: Thomas Gleixner Reviewed-by: Matt Fleming Reviewed-by: Borislav Petkov Cc: Alexander Potapenko Cc: Andrey Ryabinin Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brijesh Singh Cc: Dave Young Cc: Dmitry Vyukov Cc: Jonathan Corbet Cc: Konrad Rzeszutek Wilk Cc: Larry Woodman Cc: Linus Torvalds Cc: Michael S. Tsirkin Cc: Paolo Bonzini Cc: Peter Zijlstra Cc: Radim Krčmář Cc: Rik van Riel Cc: Toshimitsu Kani Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/7fbf40a9dc414d5da849e1ddcd7f7c1285e4e181.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar --- arch/ia64/kernel/efi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/ia64/kernel/efi.c') diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c index 1212956..8141600 100644 --- a/arch/ia64/kernel/efi.c +++ b/arch/ia64/kernel/efi.c @@ -757,14 +757,14 @@ efi_memmap_intersects (unsigned long phys_addr, unsigned long size) return 0; } -u32 +int efi_mem_type (unsigned long phys_addr) { efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); if (md) return md->type; - return 0; + return -EINVAL; } u64 -- cgit v1.1