Empty slot should be skipped when calculating CAS latency.
Signed-off-by: York Sun <york...@freescale.com>
---
.../cpu/mpc8xxx/ddr/lc_common_dimm_params.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
index a474a65..03a784c 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
@@ -27,8 +27,10 @@ compute_cas_latency_ddr3(const dimm_params_t *dimm_params,
/* compute the common CAS latency supported between slots */
tmp = dimm_params[0].caslat_X;
- for (i = 1; i < number_of_dimms; i++)
- tmp &= dimm_params[i].caslat_X;
+ for (i = 1; i < number_of_dimms; i++) {
+ if (dimm_params[i].n_ranks)
+ tmp &= dimm_params[i].caslat_X;
+ }
common_caslat = tmp;
/* compute the max tAAmin tCKmin between slots */
--
1.7.0.4
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