V4L/DVB (5449): M920x: add error messages for debugging purposes (59069e53) · Commits · 戴 / test

drivers/media/dvb/dvb-usb/m920x.c

+8 −2

Original line number	Diff line number	Diff line
		@@ -47,11 +47,15 @@ static inline int m9206_read(struct usb_device *udev, u8 request, u16 value,\
		ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
		request, USB_TYPE_VENDOR \| USB_DIR_IN,
		value, index, data, size, 2000);
		if (ret < 0)
		if (ret < 0) {
		printk(KERN_INFO "m920x_read = error: %d\n", ret);
		return ret;
		}

		if (ret != size)
		if (ret != size) {
		deb_rc("m920x_read = no data\n");
		return -EIO;
		}

		return 0;
		}
		@@ -64,6 +68,7 @@ static inline int m9206_write(struct usb_device *udev, u8 request,
		ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
		request, USB_TYPE_VENDOR \| USB_DIR_OUT,
		value, index, NULL, 0, 2000);

		return ret;
		}

		@@ -323,6 +328,7 @@ static int m9206_firmware_download(struct usb_device *udev,
		i += size;
		}
		if (i != fw->size) {
		deb_rc("bad firmware file!\n");
		ret = -EINVAL;
		goto done;
		}