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OpenCloudOS-Kernel
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x86, microcode, AMD: Exit early on success 

Once we've found and validated the ucode patch for the current CPU,
there's no need to iterate over the remaining patches in the binary
image. Exit then and save us a bunch of cycles.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This commit is contained in:
Borislav Petkov 2011-12-07 17:26:56 +01:00 committed by Borislav Petkov
parent be62adb492
commit d733689ad5
1 changed files with 9 additions and 13 deletions
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22
arch/x86/kernel/microcode_amd.c
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@ -282,11 +282,11 @@ generic_load_microcode(int cpu, const u8 *data, size_t size)
mc_hdr = patch;
new_mc = patch;
new_rev = mc_hdr->patch_id;
leftover -= mc_size;
} else {
ucode_ptr += current_size;
leftover -= current_size;
goto out_ok;
}
ucode_ptr += current_size;
leftover -= current_size;
}
if (!new_mc) {
@ -294,15 +294,11 @@ generic_load_microcode(int cpu, const u8 *data, size_t size)
goto free_table;
}
if (!leftover) {
uci->mc = new_mc;
state = UCODE_OK;
pr_debug("CPU%d update ucode (0x%08x -> 0x%08x)\n",
cpu, uci->cpu_sig.rev, new_rev);
} else {
new_mc = NULL;
state = UCODE_ERROR;
}
out_ok:
uci->mc = new_mc;
state = UCODE_OK;
pr_debug("CPU%d update ucode (0x%08x -> 0x%08x)\n",
cpu, uci->cpu_sig.rev, new_rev);
free_table:
free_equiv_cpu_table();