[coreboot-gerrit] Patch set updated for coreboot: 8b7337e Don't attempt to use null pointer (happens when no cpu_microcode_blob.bin is available) as microcode update

Vladimir Serbinenko (phcoder@gmail.com) gerrit at coreboot.org
Sat Mar 30 13:12:33 CET 2013


Vladimir Serbinenko (phcoder at gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2990

-gerrit

commit 8b7337e8f43c5d3536b8556116406e207c05aea3
Author: Vladimir Serbinenko <phcoder at gmail.com>
Date:   Sat Mar 30 12:04:23 2013 +0100

    Don't attempt to use null pointer (happens when no cpu_microcode_blob.bin is available) as microcode update
    
    Change-Id: I6e18fd37256910bf047061e4633a66cf29ad7b69
    Signed-off-by: Vladimir Serbinenko <phcoder at gmail.com>
---
 src/cpu/intel/microcode/microcode.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/cpu/intel/microcode/microcode.c b/src/cpu/intel/microcode/microcode.c
index d908c25..0cf480d 100644
--- a/src/cpu/intel/microcode/microcode.c
+++ b/src/cpu/intel/microcode/microcode.c
@@ -130,6 +130,9 @@ const void *intel_microcode_find(void)
 					       CBFS_TYPE_MICROCODE);
 #endif
 
+	/* No need for explicit error message since the user already gets
+	   "file not found" from cbfs.
+	 */
 	if (!microcode_updates)
 		return microcode_updates;
 
@@ -202,6 +205,9 @@ void intel_update_microcode(const void *microcode_updates)
 	const char *c;
 	msr_t msr;
 
+	if (!microcode_updates)
+	  return;
+
 	/* CPUID sets MSR 0x8B iff a microcode update has been loaded. */
 	msr.lo = 0;
 	msr.hi = 0;



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