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path: root/drivers/video/fbdev/udlfb.c
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Diffstat (limited to 'drivers/video/fbdev/udlfb.c')
-rw-r--r--drivers/video/fbdev/udlfb.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/video/fbdev/udlfb.c b/drivers/video/fbdev/udlfb.c
index 90f48b71fd8f..d9eec1b60e66 100644
--- a/drivers/video/fbdev/udlfb.c
+++ b/drivers/video/fbdev/udlfb.c
@@ -1649,8 +1649,9 @@ static int dlfb_usb_probe(struct usb_interface *intf,
const struct device_attribute *attr;
struct dlfb_data *dlfb;
struct fb_info *info;
- int retval = -ENOMEM;
+ int retval;
struct usb_device *usbdev = interface_to_usbdev(intf);
+ struct usb_endpoint_descriptor *out;
/* usb initialization */
dlfb = kzalloc(sizeof(*dlfb), GFP_KERNEL);
@@ -1664,6 +1665,12 @@ static int dlfb_usb_probe(struct usb_interface *intf,
dlfb->udev = usb_get_dev(usbdev);
usb_set_intfdata(intf, dlfb);
+ retval = usb_find_common_endpoints(intf->cur_altsetting, NULL, &out, NULL, NULL);
+ if (retval) {
+ dev_err(&intf->dev, "Device should have at lease 1 bulk endpoint!\n");
+ goto error;
+ }
+
dev_dbg(&intf->dev, "console enable=%d\n", console);
dev_dbg(&intf->dev, "fb_defio enable=%d\n", fb_defio);
dev_dbg(&intf->dev, "shadow enable=%d\n", shadow);
@@ -1673,6 +1680,7 @@ static int dlfb_usb_probe(struct usb_interface *intf,
if (!dlfb_parse_vendor_descriptor(dlfb, intf)) {
dev_err(&intf->dev,
"firmware not recognized, incompatible device?\n");
+ retval = -ENODEV;
goto error;
}
@@ -1686,8 +1694,10 @@ static int dlfb_usb_probe(struct usb_interface *intf,
/* allocates framebuffer driver structure, not framebuffer memory */
info = framebuffer_alloc(0, &dlfb->udev->dev);
- if (!info)
+ if (!info) {
+ retval = -ENOMEM;
goto error;
+ }
dlfb->info = info;
info->par = dlfb;