[PATCH] bus: fsl-mc: Check the platform_get_resource() return value

* [PATCH] bus: fsl-mc: Check the platform_get_resource() return value
@ 2022-04-04 14:24 Miaoqian Lin
  0 siblings, 0 replies; only message in thread
From: Miaoqian Lin @ 2022-04-04 14:24 UTC (permalink / raw)
  To: Stuart Yoder, Laurentiu Tudor, Makarand Pawagi, Diana Craciun,
	Catalin Marinas, linux-kernel
  Cc: linmq006

platform_get_resource() may fail and return NULL, so check it's value
before using it.

Fixes: 6305166c8771 ("bus: fsl-mc: Add ACPI support for fsl-mc")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 drivers/bus/fsl-mc/fsl-mc-bus.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
index 8fd4a356a86e..ab520b4ce885 100644
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -1168,6 +1168,9 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
 	 * Get physical address of MC portal for the root DPRC:
 	 */
 	plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!plat_res)
+		return -EINVAL;
+
 	mc_portal_phys_addr = plat_res->start;
 	mc_portal_size = resource_size(plat_res);
 	mc_portal_base_phys_addr = mc_portal_phys_addr & ~0x3ffffff;
-- 
2.17.1


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