Commit 50ba08f3 authored Oct 29, 2014 by Bjorn Helgaas Committed by Grant Likely Nov 04, 2014

of/fdt: Don't clear initial_boot_params if fdt_check_header() fails



If the device tree pointer is NULL, early_init_dt_verify() fails, leaving
initial_boot_params unchanged.  If the device tree pointer is non-NULL but
invalid, early_init_dt_verify() again fails but this time it also clears
initial_boot_params.

Leave initial_boot_params unchanged if the device tree pointer is invalid.
This doesn't fix a bug, but it makes the behavior more consistent and
easier to analyze.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>

parent b75b276b

drivers/of/fdt.c

+3 −6

Original line number	Diff line number	Diff line
		@@ -992,15 +992,12 @@ bool __init early_init_dt_verify(void *params)
		if (!params)
		return false;

		/* Setup flat device-tree pointer */
		initial_boot_params = params;

		/* check device tree validity */
		if (fdt_check_header(params)) {
		initial_boot_params = NULL;
		if (fdt_check_header(params))
		return false;
		}

		/* Setup flat device-tree pointer */
		initial_boot_params = params;
		return true;
		}