From: Akinobu Mita Date: Sun, 20 May 2007 12:12:10 +0000 (-0300) Subject: V4L/DVB (5678): Zr364xx: fix return values X-Git-Tag: v2.6.23-rc1~493^2~99 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=783aa8fa1fe666a039edb784d9458647da97d28a;p=linux-2.6-omap-h63xx.git V4L/DVB (5678): Zr364xx: fix return values This patch fixes several return value related problems in zr364xx. - return -ENOMEM instead of -ENODEV on out of memory - zr364xx checks video_register_device() error only when its return value is -1. But video_register_device() doesn't always return -1 on error. - If usb_register() returns error, module_init() wrongly returns 1: retval = usb_register(&zr364xx_driver) < 0; ... return retval; And it allows the module to be loaded. Because sys_init_module() doesn't see positive return value as error. Signed-off-by: Akinobu Mita Signed-off-by: Antoine Jacquet Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/video/zr364xx.c b/drivers/media/video/zr364xx.c index b5d3364c94c..ba469ec108c 100644 --- a/drivers/media/video/zr364xx.c +++ b/drivers/media/video/zr364xx.c @@ -792,6 +792,7 @@ static int zr364xx_probe(struct usb_interface *intf, { struct usb_device *udev = interface_to_usbdev(intf); struct zr364xx_camera *cam = NULL; + int err; DBG("probing..."); @@ -799,12 +800,11 @@ static int zr364xx_probe(struct usb_interface *intf, info("model %04x:%04x detected", udev->descriptor.idVendor, udev->descriptor.idProduct); - if ((cam = - kmalloc(sizeof(struct zr364xx_camera), GFP_KERNEL)) == NULL) { + cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL); + if (cam == NULL) { info("cam: out of memory !"); - return -ENODEV; + return -ENOMEM; } - memset(cam, 0x00, sizeof(struct zr364xx_camera)); /* save the init method used by this camera */ cam->method = id->driver_info; @@ -812,7 +812,7 @@ static int zr364xx_probe(struct usb_interface *intf, if (cam->vdev == NULL) { info("cam->vdev: out of memory !"); kfree(cam); - return -ENODEV; + return -ENOMEM; } memcpy(cam->vdev, &zr364xx_template, sizeof(zr364xx_template)); video_set_drvdata(cam->vdev, cam); @@ -858,12 +858,13 @@ static int zr364xx_probe(struct usb_interface *intf, cam->brightness = 64; mutex_init(&cam->lock); - if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, -1) == -1) { + err = video_register_device(cam->vdev, VFL_TYPE_GRABBER, -1); + if (err) { info("video_register_device failed"); video_device_release(cam->vdev); kfree(cam->buffer); kfree(cam); - return -ENODEV; + return err; } usb_set_intfdata(intf, cam); @@ -905,7 +906,7 @@ static struct usb_driver zr364xx_driver = { static int __init zr364xx_init(void) { int retval; - retval = usb_register(&zr364xx_driver) < 0; + retval = usb_register(&zr364xx_driver); if (retval) info("usb_register failed!"); else