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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-01 12:22:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-01 12:22:53 -0700 |
| commit | ef34ba6d36af9e6f5918f7f7e287be4b70a358b4 (patch) | |
| tree | 9df19c823c7dbaf33363e92c001305ea03f52200 | |
| parent | 8b11dd54add63aa398c4b239d31b7f4477a4b859 (diff) | |
| parent | 9adbf3c609af92a57a73000a3cb8f4c2d307dfa3 (diff) | |
| download | linux-stable-ef34ba6d36af9e6f5918f7f7e287be4b70a358b4.tar.gz | |
Merge tag 'x86_microcode_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 microcode update from Borislav Petkov:
"A single fix for late microcode loading to handle the correct return
value from stop_machine(), from Mihai Carabas"
* tag 'x86_microcode_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/microcode: Fix return value for microcode late loading
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/core.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c index 7019d4b2df0c08..baec68b7e010a8 100644 --- a/arch/x86/kernel/cpu/microcode/core.c +++ b/arch/x86/kernel/cpu/microcode/core.c @@ -545,8 +545,7 @@ static int __wait_for_cpus(atomic_t *t, long long timeout) /* * Returns: * < 0 - on error - * 0 - no update done - * 1 - microcode was updated + * 0 - success (no update done or microcode was updated) */ static int __reload_late(void *info) { @@ -573,11 +572,11 @@ static int __reload_late(void *info) else goto wait_for_siblings; - if (err > UCODE_NFOUND) { - pr_warn("Error reloading microcode on CPU %d\n", cpu); + if (err >= UCODE_NFOUND) { + if (err == UCODE_ERROR) + pr_warn("Error reloading microcode on CPU %d\n", cpu); + ret = -1; - } else if (err == UCODE_UPDATED || err == UCODE_OK) { - ret = 1; } wait_for_siblings: @@ -608,7 +607,7 @@ static int microcode_reload_late(void) atomic_set(&late_cpus_out, 0); ret = stop_machine_cpuslocked(__reload_late, NULL, cpu_online_mask); - if (ret > 0) + if (ret == 0) microcode_check(); pr_info("Reload completed, microcode revision: 0x%x\n", boot_cpu_data.microcode); @@ -649,7 +648,7 @@ static ssize_t reload_store(struct device *dev, put: put_online_cpus(); - if (ret >= 0) + if (ret == 0) ret = size; return ret; |