On Mon, Mar 06, 2023 at 09:05:05AM +0300, Ivan Bornyakov wrote:

If bus type is other than imx50_weim_devtype and have no child devices, variable 'ret' in function weim_parse_dt() will not be initialized, but will be used as branch condition and return value. Fix this by initializing 'ret' with 0.

This was discovered with help of clang-analyzer, but the situation is quite possible in real life.

Signed-off-by: Ivan Bornyakov i.bornyakov@metrotek.ru Cc: stable@vger.kernel.org

Fixes: 52c47b63412b ("bus: imx-weim: improve error handling upon child probe-failure")

Is it OK, or should I post v2 with "Fixes:" tag?

---

drivers/bus/imx-weim.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/bus/imx-weim.c b/drivers/bus/imx-weim.c index 828c66bbaa67..55d917bd1f3f 100644 --- a/drivers/bus/imx-weim.c +++ b/drivers/bus/imx-weim.c @@ -204,8 +204,8 @@ static int weim_parse_dt(struct platform_device *pdev) const struct of_device_id *of_id = of_match_device(weim_id_table, &pdev->dev); const struct imx_weim_devtype *devtype = of_id->data;

• int ret = 0, have_child = 0; struct device_node *child;

• int ret, have_child = 0; struct weim_priv *priv; void __iomem *base; u32 reg;

-- 2.39.2

If bus type is other than imx50_weim_devtype and have no child devices, variable 'ret' in function weim_parse_dt() will not be initialized, but will be used as branch condition and return value. Fix this by initializing 'ret' with 0.

This was discovered with help of clang-analyzer, but the situation is quite possible in real life.

Fixes: 52c47b63412b ("bus: imx-weim: improve error handling upon child probe-failure") Signed-off-by: Ivan Bornyakov i.bornyakov@metrotek.ru Cc: stable@vger.kernel.org Reviewed-by: Fabio Estevam festevam@gmail.com --- drivers/bus/imx-weim.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

ChangeLog: v1: [https://lore.kernel.org/all/20230306060505.11657-1-i.bornyakov@metrotek.ru/] v2: * add "Fixes" tag * add Fabio's "Reviewed-by" tag

diff --git a/drivers/bus/imx-weim.c b/drivers/bus/imx-weim.c index 828c66bbaa67..55d917bd1f3f 100644 --- a/drivers/bus/imx-weim.c +++ b/drivers/bus/imx-weim.c @@ -204,8 +204,8 @@ static int weim_parse_dt(struct platform_device *pdev) const struct of_device_id *of_id = of_match_device(weim_id_table, &pdev->dev); const struct imx_weim_devtype *devtype = of_id->data; + int ret = 0, have_child = 0; struct device_node *child; - int ret, have_child = 0; struct weim_priv *priv; void __iomem *base; u32 reg;