diff options
| author | Jianlong Huang <jianlong.huang@starfivetech.com> | 2022-06-27 10:53:33 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2022-07-11 10:22:57 +0200 |
| commit | e2961cd685fe548f0ffd6c7bd3ae6a491301b1e4 (patch) | |
| tree | 32015cc926296d7318fe4c62c543b72849ab933e /drivers/pinctrl/pinctrl-starfive.c | |
| parent | 04131ae29b2d9879ad2357e2b20a5de4dfee89cb (diff) | |
| download | linux-stable-e2961cd685fe548f0ffd6c7bd3ae6a491301b1e4.tar.gz linux-stable-e2961cd685fe548f0ffd6c7bd3ae6a491301b1e4.tar.bz2 linux-stable-e2961cd685fe548f0ffd6c7bd3ae6a491301b1e4.zip | |
pinctrl: starfive: Serialize adding groups and functions
The pinctrl dt_node_to_map method may be called in parallel which leads
us to call pinconf_generic_add_group and pinconf_generic_add_function
in parallel. This is not supported though and leads to errors, so add a
mutex to serialize these calls.
Signed-off-by: Jianlong Huang <jianlong.huang@starfivetech.com>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Link: https://lore.kernel.org/r/20220627085333.1774396-1-emil.renner.berthing@canonical.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-starfive.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-starfive.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-starfive.c b/drivers/pinctrl/pinctrl-starfive.c index 2a86c1035cc8..3eb40e230d98 100644 --- a/drivers/pinctrl/pinctrl-starfive.c +++ b/drivers/pinctrl/pinctrl-starfive.c @@ -207,6 +207,7 @@ struct starfive_pinctrl { void __iomem *base; void __iomem *padctl; struct pinctrl_dev *pctl; + struct mutex mutex; /* serialize adding groups and functions */ }; static inline unsigned int starfive_pin_to_gpio(const struct starfive_pinctrl *sfp, @@ -522,6 +523,7 @@ static int starfive_dt_node_to_map(struct pinctrl_dev *pctldev, nmaps = 0; ngroups = 0; + mutex_lock(&sfp->mutex); for_each_child_of_node(np, child) { int npins; int i; @@ -615,12 +617,14 @@ static int starfive_dt_node_to_map(struct pinctrl_dev *pctldev, *maps = map; *num_maps = nmaps; + mutex_unlock(&sfp->mutex); return 0; put_child: of_node_put(child); free_map: pinctrl_utils_free_map(pctldev, map, nmaps); + mutex_unlock(&sfp->mutex); return ret; } @@ -1267,6 +1271,7 @@ static int starfive_probe(struct platform_device *pdev) platform_set_drvdata(pdev, sfp); sfp->gc.parent = dev; raw_spin_lock_init(&sfp->lock); + mutex_init(&sfp->mutex); ret = devm_pinctrl_register_and_init(dev, &starfive_desc, sfp, &sfp->pctl); if (ret) |