@@ -14,6 +14,7 @@
#include <linux/gpio/driver.h>
#include <linux/io.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
@@ -47,6 +48,7 @@ struct rza2_pinctrl_priv {
struct pinctrl_dev *pctl;
struct pinctrl_gpio_range gpio_range;
int npins;
+ struct mutex mutex; /* serialize adding groups and functions */
};
#define RZA2_PDR(port) (0x0000 + (port) * 2) /* Direction 16-bit */
@@ -359,10 +361,13 @@ static int rza2_dt_node_to_map(struct pinctrl_dev *pctldev,
psel_val[i] = MUX_FUNC(value);
}
+ mutex_lock(&priv->mutex);
/* Register a single pin group listing all the pins we read from DT */
gsel = pinctrl_generic_add_group(pctldev, np->name, pins, npins, NULL);
- if (gsel < 0)
- return gsel;
+ if (gsel < 0) {
+ ret = gsel;
+ goto unlock_and_done;
+ }
/*
* Register a single group function where the 'data' is an array PSEL
@@ -390,6 +395,7 @@ static int rza2_dt_node_to_map(struct pinctrl_dev *pctldev,
(*map)->data.mux.group = np->name;
(*map)->data.mux.function = np->name;
*num_maps = 1;
+ mutex_unlock(&priv->mutex);
return 0;
@@ -399,6 +405,9 @@ static int rza2_dt_node_to_map(struct pinctrl_dev *pctldev,
remove_group:
pinctrl_generic_remove_group(pctldev, gsel);
+unlock_and_done:
+ mutex_unlock(&priv->mutex);
+
dev_err(priv->dev, "Unable to parse DT node %s\n", np->name);
return ret;
@@ -474,6 +483,8 @@ static int rza2_pinctrl_probe(struct platform_device *pdev)
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
+ mutex_init(&priv->mutex);
+
platform_set_drvdata(pdev, priv);
priv->npins = (int)(uintptr_t)of_device_get_match_data(&pdev->dev) *
The pinctrl group and function creation/remove calls expect caller to take care of locking. Add lock around these functions. Fixes: b59d0e782706 ("pinctrl: Add RZ/A2 pin and gpio controller") Cc: stable@kernel.org Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> --- v2->v3: * Added unlock_and_done label for lock error path. v1->v2: * No change. --- drivers/pinctrl/renesas/pinctrl-rza2.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)