diff options
Diffstat (limited to 'drivers/clk/clkdev.c')
| -rw-r--r-- | drivers/clk/clkdev.c | 53 |
1 files changed, 45 insertions, 8 deletions
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c index ee37d0be6877..e0bede6350e1 100644 --- a/drivers/clk/clkdev.c +++ b/drivers/clk/clkdev.c @@ -144,7 +144,7 @@ void clkdev_add_table(struct clk_lookup *cl, size_t num) mutex_unlock(&clocks_mutex); } -#define MAX_DEV_ID 20 +#define MAX_DEV_ID 24 #define MAX_CON_ID 16 struct clk_lookup_alloc { @@ -153,31 +153,69 @@ struct clk_lookup_alloc { char con_id[MAX_CON_ID]; }; -static struct clk_lookup * __ref +static __printf(3, 0) struct clk_lookup * __ref vclkdev_alloc(struct clk_hw *hw, const char *con_id, const char *dev_fmt, va_list ap) { struct clk_lookup_alloc *cla; + struct va_format vaf; + const char *failure; + va_list ap_copy; + size_t max_size; + ssize_t res; cla = kzalloc(sizeof(*cla), GFP_KERNEL); if (!cla) return NULL; + va_copy(ap_copy, ap); + cla->cl.clk_hw = hw; if (con_id) { - strscpy(cla->con_id, con_id, sizeof(cla->con_id)); + res = strscpy(cla->con_id, con_id, sizeof(cla->con_id)); + if (res < 0) { + max_size = sizeof(cla->con_id); + failure = "connection"; + goto fail; + } cla->cl.con_id = cla->con_id; } if (dev_fmt) { - vscnprintf(cla->dev_id, sizeof(cla->dev_id), dev_fmt, ap); + res = vsnprintf(cla->dev_id, sizeof(cla->dev_id), dev_fmt, ap); + if (res >= sizeof(cla->dev_id)) { + max_size = sizeof(cla->dev_id); + failure = "device"; + goto fail; + } cla->cl.dev_id = cla->dev_id; } + va_end(ap_copy); + + return &cla->cl; + +fail: + if (dev_fmt) + vaf.fmt = dev_fmt; + else + vaf.fmt = "null-device"; + vaf.va = &ap_copy; + pr_err("%pV:%s: %s ID is greater than %zu\n", + &vaf, con_id, failure, max_size); + va_end(ap_copy); + + /* + * Don't fail in this case, but as the entry won't ever match just + * fill it with something that also won't match. + */ + strscpy(cla->con_id, "bad", sizeof(cla->con_id)); + strscpy(cla->dev_id, "bad", sizeof(cla->dev_id)); + return &cla->cl; } -static struct clk_lookup * +static __printf(3, 0) struct clk_lookup * vclkdev_create(struct clk_hw *hw, const char *con_id, const char *dev_fmt, va_list ap) { @@ -265,9 +303,8 @@ void clkdev_drop(struct clk_lookup *cl) } EXPORT_SYMBOL(clkdev_drop); -static struct clk_lookup *__clk_register_clkdev(struct clk_hw *hw, - const char *con_id, - const char *dev_id, ...) +static __printf(3, 4) struct clk_lookup * +__clk_register_clkdev(struct clk_hw *hw, const char *con_id, const char *dev_id, ...) { struct clk_lookup *cl; va_list ap; |