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

From: Miaoqian Lin
Date: Mon Apr 04 2022 - 10:24:39 EST


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@xxxxxxxxx>
---
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