The RTC can fail, so check the return value for reads.
Signed-off-by: Simon Glass sjg@chromium.org ---
arch/x86/cpu/ivybridge/sdram.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/arch/x86/cpu/ivybridge/sdram.c b/arch/x86/cpu/ivybridge/sdram.c index 26e2e5b..e637909 100644 --- a/arch/x86/cpu/ivybridge/sdram.c +++ b/arch/x86/cpu/ivybridge/sdram.c @@ -107,11 +107,18 @@ static int read_seed_from_cmos(struct pei_data *pei_data) * the flash too much. So we store these in CMOS and the large MRC * data in SPI flash. */ - rtc_read32(dev, CMOS_OFFSET_MRC_SEED, &pei_data->scrambler_seed); + ret = rtc_read32(dev, CMOS_OFFSET_MRC_SEED, &pei_data->scrambler_seed); + if (!ret) { + ret = rtc_read32(dev, CMOS_OFFSET_MRC_SEED_S3, + &pei_data->scrambler_seed_s3); + } + if (ret) { + debug("Failed to read from RTC %s\n", dev->name); + return ret; + } + debug("Read scrambler seed 0x%08x from CMOS 0x%02x\n", pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED); - - rtc_read32(dev, CMOS_OFFSET_MRC_SEED_S3, &pei_data->scrambler_seed_s3); debug("Read S3 scrambler seed 0x%08x from CMOS 0x%02x\n", pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3);