From 9334129e8e956edfd51da37d5e5278478235c7b2 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 31 Oct 2013 19:33:45 -0700 Subject: LEDS: tca6507 - fix bugs in parsing of device-tree configuration. 1/ The led_info array must be allocated to allow the full number of LEDs even if not all are present. The array maybe be sparsely filled but it is indexed by device address so we must at least allocate as many slots as the highest address used. It is easiest just to allocate all 7. 2/ range check the 'reg' value properly. 3/ led.flags must be initialised to zero, else all leds could be treated as GPIOs (depending on what happens to be on the stack). Signed-off-by: NeilBrown Signed-off-by: Bryan Wu --- drivers/leds/leds-tca6507.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/leds') diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c index 8cc304f36728..f5063f447463 100644 --- a/drivers/leds/leds-tca6507.c +++ b/drivers/leds/leds-tca6507.c @@ -682,7 +682,7 @@ tca6507_led_dt_init(struct i2c_client *client) return ERR_PTR(-ENODEV); tca_leds = devm_kzalloc(&client->dev, - sizeof(struct led_info) * count, GFP_KERNEL); + sizeof(struct led_info) * NUM_LEDS, GFP_KERNEL); if (!tca_leds) return ERR_PTR(-ENOMEM); @@ -695,9 +695,9 @@ tca6507_led_dt_init(struct i2c_client *client) of_get_property(child, "label", NULL) ? : child->name; led.default_trigger = of_get_property(child, "linux,default-trigger", NULL); - + led.flags = 0; ret = of_property_read_u32(child, "reg", ®); - if (ret != 0) + if (ret != 0 || reg < 0 || reg >= NUM_LEDS) continue; tca_leds[reg] = led; @@ -708,7 +708,7 @@ tca6507_led_dt_init(struct i2c_client *client) return ERR_PTR(-ENOMEM); pdata->leds.leds = tca_leds; - pdata->leds.num_leds = count; + pdata->leds.num_leds = NUM_LEDS; return pdata; } -- cgit v1.2.3