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drivers/ddr: Fix possible out of bounds error

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This is a theoretical possible out of bounds error in DDR driver. Adding
check before using array index. Also change some runtime conditions to
pre-compiling conditions.

Signed-off-by: York Sun <yorksun@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
York Sun
2014-04-01 14:20:49 -07:00
parent 2ee6c52e22
commit 349689b802
3 changed files with 66 additions and 60 deletions
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6
drivers/ddr/fsl/main.c
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@@ -220,6 +220,11 @@ const char * step_to_string(unsigned int step) {
if ((1 << s) != step)
return step_string_tbl[7];
if (s >= ARRAY_SIZE(step_string_tbl)) {
printf("Error for the step in %s\n", __func__);
s = 0;
}
return step_string_tbl[s];
}
@@ -520,6 +525,7 @@ fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step,
/* STEP 5: Assign addresses to chip selects */
check_interleaving_options(pinfo);
total_mem = step_assign_addresses(pinfo, dbw_capacity_adjust);
debug("Total mem %llu assigned\n", total_mem);
case STEP_COMPUTE_REGS:
/* STEP 6: compute controller register values */