From 792c17e64383340a75579cdfc6b9b6d2b1647b43 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Thu, 19 Mar 2015 16:55:23 +0100 Subject: [PATCH] greybus: gpio: add error messages to callbacks not propagating errors Add error messages on failures to deactivate, set and get operation handlers as any errors would not be detected by the upper layers (either because the callbacks are declared void or expected to return a boolean value). Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/staging/greybus/gpio.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/drivers/staging/greybus/gpio.c b/drivers/staging/greybus/gpio.c index 7e51840cd262..2bac28ec7f85 100644 --- a/drivers/staging/greybus/gpio.c +++ b/drivers/staging/greybus/gpio.c @@ -184,8 +184,13 @@ static void gb_gpio_deactivate_operation(struct gb_gpio_controller *ggc, request.which = which; ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_DEACTIVATE, &request, sizeof(request), NULL, 0); - if (!ret) - ggc->lines[which].active = false; + if (ret) { + dev_err(ggc->chip.dev, "failed to deactivate gpio %u\n", + which); + return; + } + + ggc->lines[which].active = false; } static int gb_gpio_get_direction_operation(struct gb_gpio_controller *ggc, @@ -254,8 +259,11 @@ static int gb_gpio_get_value_operation(struct gb_gpio_controller *ggc, ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_GET_VALUE, &request, sizeof(request), &response, sizeof(response)); - if (ret) + if (ret) { + dev_err(ggc->chip.dev, "failed to get value of gpio %u\n", + which); return ret; + } value = response.value; if (value && value != 1) { @@ -283,8 +291,13 @@ static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc, request.value = value_high ? 1 : 0; ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_SET_VALUE, &request, sizeof(request), NULL, 0); - if (!ret) - ggc->lines[which].value = request.value; + if (ret) { + dev_err(ggc->chip.dev, "failed to set value of gpio %u\n", + which); + return; + } + + ggc->lines[which].value = request.value; } static int gb_gpio_set_debounce_operation(struct gb_gpio_controller *ggc,