diff options
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 778a2793e75b..3697772e3759 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -102,13 +102,13 @@ int __init early_init_dt_scan_opal(unsigned long node, int __init early_init_dt_scan_recoverable_ranges(unsigned long node, const char *uname, int depth, void *data) { - unsigned long i, size; + unsigned long i, psize, size; const __be32 *prop; if (depth != 1 || strcmp(uname, "ibm,opal") != 0) return 0; - prop = of_get_flat_dt_prop(node, "mcheck-recoverable-ranges", &size); + prop = of_get_flat_dt_prop(node, "mcheck-recoverable-ranges", &psize); if (!prop) return 1; @@ -116,6 +116,23 @@ int __init early_init_dt_scan_recoverable_ranges(unsigned long node, pr_debug("Found machine check recoverable ranges.\n"); /* + * Calculate number of available entries. + * + * Each recoverable address range entry is (start address, len, + * recovery address), 2 cells each for start and recovery address, + * 1 cell for len, totalling 5 cells per entry. + */ + mc_recoverable_range_len = psize / (sizeof(*prop) * 5); + + /* Sanity check */ + if (!mc_recoverable_range_len) + return 1; + + /* Size required to hold all the entries. */ + size = mc_recoverable_range_len * + sizeof(struct mcheck_recoverable_range); + + /* * Allocate a buffer to hold the MC recoverable ranges. We would be * accessing them in real mode, hence it needs to be within * RMO region. @@ -124,11 +141,7 @@ int __init early_init_dt_scan_recoverable_ranges(unsigned long node, ppc64_rma_size)); memset(mc_recoverable_range, 0, size); - /* - * Each recoverable address entry is an (start address,len, - * recover address) pair, * 2 cells each, totalling 4 cells per entry. - */ - for (i = 0; i < size / (sizeof(*prop) * 5); i++) { + for (i = 0; i < mc_recoverable_range_len; i++) { mc_recoverable_range[i].start_addr = of_read_number(prop + (i * 5) + 0, 2); mc_recoverable_range[i].end_addr = @@ -142,7 +155,6 @@ int __init early_init_dt_scan_recoverable_ranges(unsigned long node, mc_recoverable_range[i].end_addr, mc_recoverable_range[i].recover_addr); } - mc_recoverable_range_len = i; return 1; } |