V4L/DVB (5449): M920x: add error messages for debugging purposes

Signed-off-by: Pierre Willenbrock <pierre@pirsoft.dnsalias.org>
Signed-off-by: Aapo Tahkola <aet@rasterburn.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/dvb/dvb-usb/m920x.c b/drivers/media/dvb/dvb-usb/m920x.c
index 485ea5c..fd6583b 100644 (file)
--- a/drivers/media/dvb/dvb-usb/m920x.c
+++ b/drivers/media/dvb/dvb-usb/m920x.c
@@ -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;
                }