[coreboot-gerrit] Change in coreboot[master]: lib: Treat dimm addr_map 0 as not exist

[Eric Lai (Code Review)]

Eric Lai has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/63628 )

Change subject: lib: Treat dimm addr_map 0 as not exist
......................................................................

lib: Treat dimm addr_map 0 as not exist

Treat dimm addr_map 0 as not exist. addr_map default is 0, we don't set
it if there no HW exist.

BUG=b:213964936
BRANCH=firmware-brya-14505.B
TEST=emerge-brya coreboot chromeos-bootimage
The MRC training does not be performed again after rebooting.

Signed-off-by: Eric Lai 
Change-Id: I2ada0109eb0805174cb85d4ce373e2a3ab7dbcac
---
M src/lib/spd_cache.c
1 file changed, 4 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/63628/1

diff --git a/src/lib/spd_cache.c b/src/lib/spd_cache.c
index 44830a8..3814e3c 100644
--- a/src/lib/spd_cache.c
+++ b/src/lib/spd_cache.c
@@ -155,6 +155,10 @@
    bool dimm_changed = false;
    /* Check if the dimm is the same with last system boot. */
    for (i = 0; i < SC_SPD_NUMS && !dimm_changed; i++) {
+		if (blk->addr_map[i] == 0) {
+			printk(BIOS_NOTICE, "SPD_CACHE: DIMM%d is not exist\n", i);
+			continue;
+		}
    	/* Return true if any error happened here. */
    	if (get_spd_sn(blk->addr_map[i], &sn) == CB_ERR)
    		return true;