[PATCH] gpio: virtio: Fix sparse warnings
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2021-08-31 05:29:35
Also in:
lkml, virtualization
Subsystem:
gpio subsystem, the rest, virtio core, virtio gpio driver · Maintainers:
Linus Walleij, Bartosz Golaszewski, Linus Torvalds, "Michael S. Tsirkin", Jason Wang, Eugenio Pérez, Enrico Weigelt, metux IT consult, Viresh Kumar
Fix warnings reported by sparse, related to type mismatch between u16
and __le16.
Reported-by: kernel test robot <redacted>
Fixes: 3a29355a22c0 ("gpio: Add virtio-gpio driver")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/gpio/gpio-virtio.c | 41 ++++++++++++++++----------------
include/uapi/linux/virtio_gpio.h | 10 ++++----
2 files changed, 25 insertions(+), 26 deletions(-)
diff --git a/drivers/gpio/gpio-virtio.c b/drivers/gpio/gpio-virtio.c
index d33eb237c0b9..d24f1c9264bc 100644
--- a/drivers/gpio/gpio-virtio.c
+++ b/drivers/gpio/gpio-virtio.c@@ -32,7 +32,6 @@ struct virtio_gpio { struct virtio_device *vdev; struct mutex lock; /* Protects virtqueue operation */ struct gpio_chip gc; - struct virtio_gpio_config config; struct virtio_gpio_line *lines; struct virtqueue *request_vq; };
@@ -57,7 +56,7 @@ static int _virtio_gpio_req(struct virtio_gpio *vgpio, u16 type, u16 gpio, req->type = cpu_to_le16(type); req->gpio = cpu_to_le16(gpio); - req->value = txvalue; + req->value = cpu_to_le32(txvalue); sg_init_one(&req_sg, req, sizeof(*req)); sg_init_one(&res_sg, res, rxlen);
@@ -233,19 +232,19 @@ static int virtio_gpio_alloc_vqs(struct virtio_gpio *vgpio, return 0; } -static const char **virtio_gpio_get_names(struct virtio_gpio *vgpio) +static const char **virtio_gpio_get_names(struct virtio_gpio *vgpio, + u32 gpio_names_size, u16 ngpio) { - struct virtio_gpio_config *config = &vgpio->config; struct virtio_gpio_response_get_names *res; struct device *dev = &vgpio->vdev->dev; u8 *gpio_names, *str; const char **names; int i, ret, len; - if (!config->gpio_names_size) + if (!gpio_names_size) return NULL; - len = sizeof(*res) + config->gpio_names_size; + len = sizeof(*res) + gpio_names_size; res = devm_kzalloc(dev, len, GFP_KERNEL); if (!res) return NULL;
@@ -258,18 +257,18 @@ static const char **virtio_gpio_get_names(struct virtio_gpio *vgpio) return NULL; } - names = devm_kcalloc(dev, config->ngpio, sizeof(*names), GFP_KERNEL); + names = devm_kcalloc(dev, ngpio, sizeof(*names), GFP_KERNEL); if (!names) return NULL; /* NULL terminate the string instead of checking it */ - gpio_names[config->gpio_names_size - 1] = '\0'; + gpio_names[gpio_names_size - 1] = '\0'; - for (i = 0, str = gpio_names; i < config->ngpio; i++) { + for (i = 0, str = gpio_names; i < ngpio; i++) { names[i] = str; str += strlen(str) + 1; /* zero-length strings are allowed */ - if (str > gpio_names + config->gpio_names_size) { + if (str > gpio_names + gpio_names_size) { dev_err(dev, "gpio_names block is too short (%d)\n", i); return NULL; }
@@ -280,31 +279,31 @@ static const char **virtio_gpio_get_names(struct virtio_gpio *vgpio) static int virtio_gpio_probe(struct virtio_device *vdev) { - struct virtio_gpio_config *config; + struct virtio_gpio_config config; struct device *dev = &vdev->dev; struct virtio_gpio *vgpio; + u32 gpio_names_size; + u16 ngpio; int ret, i; vgpio = devm_kzalloc(dev, sizeof(*vgpio), GFP_KERNEL); if (!vgpio) return -ENOMEM; - config = &vgpio->config; - /* Read configuration */ - virtio_cread_bytes(vdev, 0, config, sizeof(*config)); - config->gpio_names_size = le32_to_cpu(config->gpio_names_size); - config->ngpio = le16_to_cpu(config->ngpio); - if (!config->ngpio) { + virtio_cread_bytes(vdev, 0, &config, sizeof(config)); + gpio_names_size = le32_to_cpu(config.gpio_names_size); + ngpio = le16_to_cpu(config.ngpio); + if (!ngpio) { dev_err(dev, "Number of GPIOs can't be zero\n"); return -EINVAL; } - vgpio->lines = devm_kcalloc(dev, config->ngpio, sizeof(*vgpio->lines), GFP_KERNEL); + vgpio->lines = devm_kcalloc(dev, ngpio, sizeof(*vgpio->lines), GFP_KERNEL); if (!vgpio->lines) return -ENOMEM; - for (i = 0; i < config->ngpio; i++) { + for (i = 0; i < ngpio; i++) { mutex_init(&vgpio->lines[i].lock); init_completion(&vgpio->lines[i].completion); }
@@ -319,7 +318,7 @@ static int virtio_gpio_probe(struct virtio_device *vdev) vgpio->gc.direction_output = virtio_gpio_direction_output; vgpio->gc.get = virtio_gpio_get; vgpio->gc.set = virtio_gpio_set; - vgpio->gc.ngpio = config->ngpio; + vgpio->gc.ngpio = ngpio; vgpio->gc.base = -1; /* Allocate base dynamically */ vgpio->gc.label = dev_name(dev); vgpio->gc.parent = dev;
@@ -333,7 +332,7 @@ static int virtio_gpio_probe(struct virtio_device *vdev) /* Mark the device ready to perform operations from within probe() */ virtio_device_ready(vdev); - vgpio->gc.names = virtio_gpio_get_names(vgpio); + vgpio->gc.names = virtio_gpio_get_names(vgpio, gpio_names_size, ngpio); ret = gpiochip_add_data(&vgpio->gc, vgpio); if (ret) {
diff --git a/include/uapi/linux/virtio_gpio.h b/include/uapi/linux/virtio_gpio.h
index 844574acf095..0445f905d8cc 100644
--- a/include/uapi/linux/virtio_gpio.h
+++ b/include/uapi/linux/virtio_gpio.h@@ -22,16 +22,16 @@ #define VIRTIO_GPIO_DIRECTION_IN 0x02 struct virtio_gpio_config { - __u16 ngpio; + __le16 ngpio; __u8 padding[2]; - __u32 gpio_names_size; + __le32 gpio_names_size; } __packed; /* Virtio GPIO Request / Response */ struct virtio_gpio_request { - __u16 type; - __u16 gpio; - __u32 value; + __le16 type; + __le16 gpio; + __le32 value; }; struct virtio_gpio_response {
--
2.31.1.272.g89b43f80a514