From c162ca0bcbfb39308c4dff4157e27c751af7032a Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Tue, 8 Feb 2022 11:37:56 +0100 Subject: [PATCH] gpio: sim: fix hogs with custom chip labels We always assign the default device name as the chip_label in hog structures which makes it impossible to assign hogs to chips. Let's first check if a custom label was set and then copy it instead of the default device name. Fixes: cb8c474e79be ("gpio: sim: new testing module") Signed-off-by: Bartosz Golaszewski Reviewed-by: Andy Shevchenko --- drivers/gpio/gpio-sim.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c index 04b137eca8da..153fe79e1bf3 100644 --- a/drivers/gpio/gpio-sim.c +++ b/drivers/gpio/gpio-sim.c @@ -570,6 +570,11 @@ static struct gpio_sim_bank *to_gpio_sim_bank(struct config_item *item) return container_of(group, struct gpio_sim_bank, group); } +static bool gpio_sim_bank_has_label(struct gpio_sim_bank *bank) +{ + return bank->label && *bank->label; +} + static struct gpio_sim_device * gpio_sim_bank_get_device(struct gpio_sim_bank *bank) { @@ -770,9 +775,15 @@ static int gpio_sim_add_hogs(struct gpio_sim_device *dev) * point the device doesn't exist yet and so dev_name() * is not available. */ - hog->chip_label = kasprintf(GFP_KERNEL, - "gpio-sim.%u-%s", dev->id, - fwnode_get_name(bank->swnode)); + if (gpio_sim_bank_has_label(bank)) + hog->chip_label = kstrdup(bank->label, + GFP_KERNEL); + else + hog->chip_label = kasprintf(GFP_KERNEL, + "gpio-sim.%u-%s", + dev->id, + fwnode_get_name( + bank->swnode)); if (!hog->chip_label) { gpio_sim_remove_hogs(dev); return -ENOMEM; @@ -816,7 +827,7 @@ gpio_sim_make_bank_swnode(struct gpio_sim_bank *bank, properties[prop_idx++] = PROPERTY_ENTRY_U32("ngpios", bank->num_lines); - if (bank->label && (strlen(bank->label) > 0)) + if (gpio_sim_bank_has_label(bank)) properties[prop_idx++] = PROPERTY_ENTRY_STRING("gpio-sim,label", bank->label);