[PATCH v3 3/3] soc: qcom: rtmfs: Handle reserved-memory allocation issues

Bjorn Andersson
2023-09-21T02:38:01Z

In the even that Linux failed to allocate the reserved memory range
specified in the DeviceTree, the size of the reserved_mem will be 0,
which results in a oops when memory remapping is attempted.

Detect this and report that the memory region was not found instead.

Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
drivers/soc/qcom/rmtfs_mem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/rmtfs_mem.c b/drivers/soc/qcom/rmtfs_mem.c
index 83bba9321e72..13823abd85c2 100644
--- a/drivers/soc/qcom/rmtfs_mem.c
+++ b/drivers/soc/qcom/rmtfs_mem.c
@@ -180,7 +180,7 @@ static int qcom_rmtfs_mem_probe(struct platform_device *pdev)
int ret, i;

rmem = of_reserved_mem_lookup(node);
- if (!rmem) {
+ if (!rmem || !rmem->size) {
dev_err(&pdev->dev, "failed to acquire memory region\n");
return -EINVAL;
}

--
2.25.1