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- From: Tobias Wolf <dev-NTEO@vplace.de>
- Date: Wed, 23 Nov 2016 10:40:07 +0100
- Subject: [PATCH] of: Add check to of_scan_flat_dt() before accessing
- initial_boot_params
- An empty __dtb_start to __dtb_end section might result in initial_boot_params
- being null for arch/mips/ralink. This showed that the boot process hangs
- indefinitely in of_scan_flat_dt().
- Signed-off-by: Tobias Wolf <dev-NTEO@vplace.de>
- ---
- --- a/drivers/of/fdt.c
- +++ b/drivers/of/fdt.c
- @@ -632,9 +632,12 @@ int __init of_scan_flat_dt(int (*it)(uns
- const char *pathp;
- int offset, rc = 0, depth = -1;
-
- - for (offset = fdt_next_node(blob, -1, &depth);
- - offset >= 0 && depth >= 0 && !rc;
- - offset = fdt_next_node(blob, offset, &depth)) {
- + if (!blob)
- + return 0;
- +
- + for (offset = fdt_next_node(blob, -1, &depth);
- + offset >= 0 && depth >= 0 && !rc;
- + offset = fdt_next_node(blob, offset, &depth)) {
-
- pathp = fdt_get_name(blob, offset, NULL);
- if (*pathp == '/')
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