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powerpc/mpc8xxx: check SPD length before using part number

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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;