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powerpc/mpc8xxx: check SPD length before using part number 

Only use DDR DIMM part number if SPD has valid length, to prevent from
display garbage in case SPD doesn't cover these fields.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
York Sun 2011-05-27 07:25:50 +08:00 committed by Kumar Gala
parent e090aa7cf0
commit d2246549c7
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/cpu/mpc8xxx/ddr/ddr3_dimm_params.c
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@ -114,7 +114,8 @@ ddr_compute_dimm_parameters(const ddr3_spd_eeprom_t *spd,
* and copying the part name in ASCII from the SPD onto it
*/
memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
memcpy(pdimm->mpart, spd->mpart, sizeof(pdimm->mpart) - 1);
if ((spd->info_size_crc & 0xF) > 1)
memcpy(pdimm->mpart, spd->mpart, sizeof(pdimm->mpart) - 1);
/* DIMM organization parameters */
pdimm->n_ranks = ((spd->organization >> 3) & 0x7) + 1;