Commit-ID: 8feaa64a9a69652fdff87205f8a8cfe1bfd5b522 Gitweb: http://git.kernel.org/tip/8feaa64a9a69652fdff87205f8a8cfe1bfd5b522 Author: Borislav Petkov <b...@suse.de> AuthorDate: Sun, 18 Dec 2016 17:44:11 +0100 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Mon, 19 Dec 2016 10:46:19 +0100
x86/microcode/AMD: Make find_proper_container() sane again Fixup signature and retvals, return the container struct through the passed in pointer, not as a function return value. Signed-off-by: Borislav Petkov <b...@suse.de> Cc: Jürgen Gross <jgr...@suse.com> Cc: Boris Ostrovsky <boris.ostrov...@oracle.com> Link: http://lkml.kernel.org/r/20161218164414.9649-2...@alien8.de Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- arch/x86/kernel/cpu/microcode/amd.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c index 6f353bd..31f4e3f 100644 --- a/arch/x86/kernel/cpu/microcode/amd.c +++ b/arch/x86/kernel/cpu/microcode/amd.c @@ -116,10 +116,11 @@ static inline u16 find_equiv_id(struct equiv_cpu_entry *equiv_cpu_table, /* * This scans the ucode blob for the proper container as we can have multiple - * containers glued together. + * containers glued together. Returns the equivalence ID from the equivalence + * table or 0 if none found. */ -static struct container -find_proper_container(u8 *ucode, size_t size, u16 *ret_id) +static u16 +find_proper_container(u8 *ucode, size_t size, struct container *ret_cont) { struct container ret = { NULL, 0 }; u32 eax, ebx, ecx, edx; @@ -138,7 +139,7 @@ find_proper_container(u8 *ucode, size_t size, u16 *ret_id) if (header[0] != UCODE_MAGIC || header[1] != UCODE_EQUIV_CPU_TABLE_TYPE || /* type */ header[2] == 0) /* size */ - return ret; + return eq_id; eax = 0x00000001; ecx = 0; @@ -163,8 +164,9 @@ find_proper_container(u8 *ucode, size_t size, u16 *ret_id) * ucode update loop below */ left = ret.size - offset; - *ret_id = eq_id; - return ret; + + *ret_cont = ret; + return eq_id; } /* @@ -189,7 +191,7 @@ find_proper_container(u8 *ucode, size_t size, u16 *ret_id) ucode = data; } - return ret; + return eq_id; } static int __apply_microcode_amd(struct microcode_amd *mc_amd) @@ -237,7 +239,7 @@ apply_microcode_early_amd(void *ucode, size_t size, bool save_patch) if (check_current_patch_level(&rev, true)) return (struct container){ NULL, 0 }; - ret = find_proper_container(ucode, size, &eq_id); + eq_id = find_proper_container(ucode, size, &ret); if (!eq_id) return (struct container){ NULL, 0 }; @@ -443,7 +445,7 @@ int __init save_microcode_in_initrd_amd(unsigned int fam) return -EINVAL; } - cont = find_proper_container(cp.data, cp.size, &eq_id); + eq_id = find_proper_container(cp.data, cp.size, &cont); if (!eq_id) { cont.size = -1; return -EINVAL;
