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| author | Wells Lu <wellslutw@gmail.com> | 2023-05-28 15:34:37 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2023-05-30 14:47:20 +0300 |
| commit | a5961bed5429cf1134d7f539b4ed60317012f84d (patch) | |
| tree | 4294235f94af8a9659a85c88316065b8f6f7ed26 | |
| parent | d8572531736f2182b5587eab1b32a883be05b4e0 (diff) | |
| download | linux-a5961bed5429cf1134d7f539b4ed60317012f84d.tar.xz | |
pinctrl: sunplus: Add check for kmalloc
Fix Smatch static checker warning:
potential null dereference 'configs'. (kmalloc returns null)
Fixes: aa74c44be19c ("pinctrl: Add driver for Sunplus SP7021")
Signed-off-by: Wells Lu <wellslutw@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/1685277277-12209-1-git-send-email-wellslutw@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | drivers/pinctrl/sunplus/sppctl.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/pinctrl/sunplus/sppctl.c b/drivers/pinctrl/sunplus/sppctl.c index 6bbbab3a6fdf..e91ce5b5d559 100644 --- a/drivers/pinctrl/sunplus/sppctl.c +++ b/drivers/pinctrl/sunplus/sppctl.c @@ -834,11 +834,6 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node int i, size = 0; list = of_get_property(np_config, "sunplus,pins", &size); - - if (nmG <= 0) - nmG = 0; - - parent = of_get_parent(np_config); *num_maps = size / sizeof(*list); /* @@ -866,10 +861,14 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node } } + if (nmG <= 0) + nmG = 0; + *map = kcalloc(*num_maps + nmG, sizeof(**map), GFP_KERNEL); - if (*map == NULL) + if (!(*map)) return -ENOMEM; + parent = of_get_parent(np_config); for (i = 0; i < (*num_maps); i++) { dt_pin = be32_to_cpu(list[i]); pin_num = FIELD_GET(GENMASK(31, 24), dt_pin); @@ -883,6 +882,8 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node (*map)[i].data.configs.num_configs = 1; (*map)[i].data.configs.group_or_pin = pin_get_name(pctldev, pin_num); configs = kmalloc(sizeof(*configs), GFP_KERNEL); + if (!configs) + goto sppctl_map_err; *configs = FIELD_GET(GENMASK(7, 0), dt_pin); (*map)[i].data.configs.configs = configs; @@ -896,6 +897,8 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node (*map)[i].data.configs.num_configs = 1; (*map)[i].data.configs.group_or_pin = pin_get_name(pctldev, pin_num); configs = kmalloc(sizeof(*configs), GFP_KERNEL); + if (!configs) + goto sppctl_map_err; *configs = SPPCTL_IOP_CONFIGS; (*map)[i].data.configs.configs = configs; @@ -965,6 +968,15 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node of_node_put(parent); dev_dbg(pctldev->dev, "%d pins mapped\n", *num_maps); return 0; + +sppctl_map_err: + for (i = 0; i < (*num_maps); i++) + if (((*map)[i].type == PIN_MAP_TYPE_CONFIGS_PIN) && + (*map)[i].data.configs.configs) + kfree((*map)[i].data.configs.configs); + kfree(*map); + of_node_put(parent); + return -ENOMEM; } static const struct pinctrl_ops sppctl_pctl_ops = { |