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>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/media/dvb/dvb-usb/m920x.c b/drivers/media/dvb/dvb-usb/m920x.c
index 485ea5ca5aeb..fd6583bed335 100644
--- 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;
                 }