From: Mathew McBride <matt@traverse.com.au>
Date: Wed, 12 Apr 2023 07:38:13 +0000 (+0000)
Subject: armv8: fsl-layerscape: check for crypto node first in fdt_fixup_remove_jr
X-Git-Url: http://git.dujemihanovic.xyz/login.html?a=commitdiff_plain;h=8586a938682dbb0da669073c851e1f5ac62c37fe;p=u-boot.git

armv8: fsl-layerscape: check for crypto node first in fdt_fixup_remove_jr

This a problem I found while updating the U-Boot fsl-ls1088a.dtsi
to match the Linux version.

fdt_fixup_remove_jr did not check whether there was a "crypto"
alias in the device tree before calling more fdt_* functions,
which resulted in a crash.

Fixes: a797f274
("ARMv8/sec_firmware : Update chosen/kaslr-seed with random number")

Signed-off-by: Mathew McBride <matt@traverse.com.au>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com> # on LS1088A-RDB
---

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
index 4f91db49ee..22ce699216 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
@@ -387,6 +387,10 @@ void fdt_fixup_remove_jr(void *blob)
 	u64 jr_offset, used_jr;
 	fdt32_t *reg;
 
+	/* Return if crypto node not found */
+	if (crypto_node < 0)
+		return;
+
 	used_jr = sec_firmware_used_jobring_offset();
 	fdt_support_default_count_cells(blob, crypto_node, &addr_cells, NULL);