[coreboot-gerrit] New patch to review for coreboot: soc/intel/apollolake: Fix bitshift issue in bootblock

[Andrey Petrov (andrey.petrov@intel.com)]

Andrey Petrov (andrey.petrov at intel.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/15727

-gerrit

commit 445787823d0771d8e7061e7bda65045c30620783
Author: Andrey Petrov <andrey.petrov at intel.com>
Date:   Mon Jul 18 07:59:03 2016 -0700

    soc/intel/apollolake: Fix bitshift issue in bootblock
    
    Fix issue where zero-sized BIOS region could cause bitshift
    for '-1' which is an unspecified behavior.
    
    Change-Id: Icb62bf413a1a0d293657503ef21fe97b5f9a5484
    Signed-off-by: Andrey Petrov <andrey.petrov at intel.com>
---
 src/soc/intel/apollolake/bootblock/bootblock.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/soc/intel/apollolake/bootblock/bootblock.c b/src/soc/intel/apollolake/bootblock/bootblock.c
index 8c1ff91..31144ff 100644
--- a/src/soc/intel/apollolake/bootblock/bootblock.c
+++ b/src/soc/intel/apollolake/bootblock/bootblock.c
@@ -98,7 +98,10 @@ static void cache_bios_region(void)
 		return;
 
 	/* Only the IFD BIOS region is memory mapped (at top of 4G) */
-	rom_size =  get_bios_size();
+	rom_size = get_bios_size();
+
+	if (!rom_size)
+		return;
 
 	/* Round to power of two */
 	alignment = 1 << (log2_ceil(rom_size));