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authorGustavo A. R. Silva <gustavo@embeddedor.com>2019-06-07 02:11:44 +0300
committerLinus Walleij <linus.walleij@linaro.org>2019-06-08 02:29:43 +0300
commitd32aa74555575a0692f4e06fe39a673a1877eff6 (patch)
tree60793254feef686146cff59bf83b1361db27d604 /drivers/pinctrl
parent76c4c597b2ef59900933fca8893428f0555afaab (diff)
downloadlinux-d32aa74555575a0692f4e06fe39a673a1877eff6.tar.xz
pinctrl: tb10x: Use flexible-array member and struct_size() helper
Update the code to use a flexible array member instead of a pointer in structure tb10x_pinctrl and use the struct_size() helper: struct tb10x_pinctrl { ... struct tb10x_of_pinfunc pinfuncs[]; }; Also, make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes. So, replace the following form: sizeof(struct tb10x_pinctrl) + of_get_child_count(of_node) * sizeof(struct tb10x_of_pinfunc) with: struct_size(state, pinfuncs, of_get_child_count(of_node)) This code was detected with the help of Coccinelle. Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/pinctrl-tb10x.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/pinctrl/pinctrl-tb10x.c b/drivers/pinctrl/pinctrl-tb10x.c
index 2e90a6d8fb3b..a32badf3f118 100644
--- a/drivers/pinctrl/pinctrl-tb10x.c
+++ b/drivers/pinctrl/pinctrl-tb10x.c
@@ -483,22 +483,22 @@ struct tb10x_port {
* @base: register set base address.
* @pingroups: pointer to an array of the pin groups this driver manages.
* @pinfuncgrpcnt: number of pingroups in @pingroups.
- * @pinfuncs: pointer to an array of pin functions this driver manages.
* @pinfuncnt: number of pin functions in @pinfuncs.
* @mutex: mutex for exclusive access to a pin controller's state.
* @ports: current state of each port.
* @gpios: Indicates if a given pin is currently used as GPIO (1) or not (0).
+ * @pinfuncs: flexible array of pin functions this driver manages.
*/
struct tb10x_pinctrl {
struct pinctrl_dev *pctl;
void *base;
const struct tb10x_pinfuncgrp *pingroups;
unsigned int pinfuncgrpcnt;
- struct tb10x_of_pinfunc *pinfuncs;
unsigned int pinfuncnt;
struct mutex mutex;
struct tb10x_port ports[TB10X_PORTS];
DECLARE_BITMAP(gpios, MAX_PIN + 1);
+ struct tb10x_of_pinfunc pinfuncs[];
};
static inline void tb10x_pinctrl_set_config(struct tb10x_pinctrl *state,
@@ -771,15 +771,13 @@ static int tb10x_pinctrl_probe(struct platform_device *pdev)
return -EINVAL;
}
- state = devm_kzalloc(dev, sizeof(struct tb10x_pinctrl) +
- of_get_child_count(of_node)
- * sizeof(struct tb10x_of_pinfunc),
- GFP_KERNEL);
+ state = devm_kzalloc(dev, struct_size(state, pinfuncs,
+ of_get_child_count(of_node)),
+ GFP_KERNEL);
if (!state)
return -ENOMEM;
platform_set_drvdata(pdev, state);
- state->pinfuncs = (struct tb10x_of_pinfunc *)(state + 1);
mutex_init(&state->mutex);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);