From: Zhang Changzhong <zhangchangzhong@xxxxxxxxxx>
[ Upstream commit c3d4e5b12672bbdf63f4cc933e3169bc6bbec8da ]
platform_get_resource() may fail and in this case a NULL dereference
will occur.
Fix it to use devm_platform_ioremap_resource() instead of calling
platform_get_resource() and devm_ioremap().
This is detected by Coccinelle semantic patch.
@@
expression pdev, res, n, t, e, e1, e2;
@@
res = \(platform_get_resource\|platform_get_resource_byname\)(pdev, t,
n);
+ if (!res)
+ return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);
Fixes: dc160e449122 ("remoteproc: qcom: Introduce Non-PAS ADSP PIL driver")
Signed-off-by: Zhang Changzhong <zhangchangzhong@xxxxxxxxxx>
Link: https://lore.kernel.org/r/1607392460-20516-1-git-send-email-zhangchangzhong@xxxxxxxxxx
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/remoteproc/qcom_q6v5_adsp.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
index cd88ceabf03e9..24e8b7e271773 100644
--- a/drivers/remoteproc/qcom_q6v5_adsp.c
+++ b/drivers/remoteproc/qcom_q6v5_adsp.c
@@ -347,15 +347,12 @@ static int adsp_init_mmio(struct qcom_adsp *adsp,
struct platform_device *pdev)
{
struct device_node *syscon;
- struct resource *res;
int ret;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- adsp->qdsp6ss_base = devm_ioremap(&pdev->dev, res->start,
- resource_size(res));
- if (!adsp->qdsp6ss_base) {
+ adsp->qdsp6ss_base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(adsp->qdsp6ss_base)) {
dev_err(adsp->dev, "failed to map QDSP6SS registers\n");
- return -ENOMEM;
+ return PTR_ERR(adsp->qdsp6ss_base);
}
syscon = of_parse_phandle(pdev->dev.of_node, "qcom,halt-regs", 0);
--
2.27.0
