Empty slot should be skipped when calculating CAS latency.
Signed-off-by: York Sun yorksun@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 */