Commit 3ec75441 authored Nov 23, 2016 by Tobias Wolf Committed by Ralf Baechle Jan 03, 2017

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>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14605/

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent 02564fc8

drivers/of/fdt.c

+6 −3

Original line number	Diff line number	Diff line
		@@ -738,6 +738,9 @@ int __init of_scan_flat_dt(int (*it)(unsigned long node,
		const char *pathp;
		int offset, rc = 0, depth = -1;

		if (!blob)
		return 0;

		for (offset = fdt_next_node(blob, -1, &depth);
		offset >= 0 && depth >= 0 && !rc;
		offset = fdt_next_node(blob, offset, &depth)) {

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