diff options
| -rw-r--r-- | drivers/pinctrl/mvebu/pinctrl-mvebu.c | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.c b/drivers/pinctrl/mvebu/pinctrl-mvebu.c index 6114991..38d3b22 100644 --- a/drivers/pinctrl/mvebu/pinctrl-mvebu.c +++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.c @@ -478,8 +478,12 @@ static const struct pinctrl_ops mvebu_pinctrl_ops = { .dt_free_map = mvebu_pinctrl_dt_free_map, }; -static int _add_function(struct mvebu_pinctrl_function *funcs, const char *name) +static int _add_function(struct mvebu_pinctrl_function *funcs, int *funcsize, + const char *name) { + if (*funcsize <= 0) + return -EOVERFLOW; + while (funcs->num_groups) { /* function already there */ if (strcmp(funcs->name, name) == 0) { @@ -488,8 +492,12 @@ static int _add_function(struct mvebu_pinctrl_function *funcs, const char *name) } funcs++; } + + /* append new unique function */ funcs->name = name; funcs->num_groups = 1; + (*funcsize)--; + return 0; } @@ -497,12 +505,12 @@ static int mvebu_pinctrl_build_functions(struct platform_device *pdev, struct mvebu_pinctrl *pctl) { struct mvebu_pinctrl_function *funcs; - int num = 0; + int num = 0, funcsize = pctl->desc.npins; int n, s; /* we allocate functions for number of pins and hope - * there are less unique functions than pins available */ - funcs = devm_kzalloc(&pdev->dev, pctl->desc.npins * + * there are fewer unique functions than pins available */ + funcs = devm_kzalloc(&pdev->dev, funcsize * sizeof(struct mvebu_pinctrl_function), GFP_KERNEL); if (!funcs) return -ENOMEM; @@ -510,26 +518,27 @@ static int mvebu_pinctrl_build_functions(struct platform_device *pdev, for (n = 0; n < pctl->num_groups; n++) { struct mvebu_pinctrl_group *grp = &pctl->groups[n]; for (s = 0; s < grp->num_settings; s++) { + int ret; + /* skip unsupported settings on this variant */ if (pctl->variant && !(pctl->variant & grp->settings[s].variant)) continue; /* check for unique functions and count groups */ - if (_add_function(funcs, grp->settings[s].name)) + ret = _add_function(funcs, &funcsize, + grp->settings[s].name); + if (ret == -EOVERFLOW) + dev_err(&pdev->dev, + "More functions than pins(%d)\n", + pctl->desc.npins); + if (ret < 0) continue; num++; } } - /* with the number of unique functions and it's groups known, - reallocate functions and assign group names */ - funcs = krealloc(funcs, num * sizeof(struct mvebu_pinctrl_function), - GFP_KERNEL); - if (!funcs) - return -ENOMEM; - pctl->num_functions = num; pctl->functions = funcs; |
