V4L/DVB (4924): Fix some bugs on usbvision due to the merge into one module

Found the bug that prevented the driver from loading : a module
param conflict between usbvision-i2c and usbvision-core (debug
parameter).
- correct the module param "debug" conflics in usbvision-i2c.c and
usbvision-core.c
- add some debug printouts in usbvision-core.c VDIOC_QBUF/VIDIOC_DQBUF
- usbvision-core.c : add vb->field = V4L2_FIELD_NONE in VIDIOC_DQBUF

Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

2 files changed, 12 insertions, 14 deletions

diff --git a/drivers/media/video/usbvision/usbvision-core.c b/drivers/media/video/usbvision/usbvision-core.c
index a23fcd15a1d0..da422e7793ad 100644
--- a/drivers/media/video/usbvision/usbvision-core.c
+++ b/drivers/media/video/usbvision/usbvision-core.c
@@ -4240,6 +4240,7 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
 
                         /* set v4l2_format index */
                         frame->v4l2_format = usbvision->palette;
+                        PDEBUG(DBG_IOCTL, "VIDIOC_QBUF frame=%d",vb->index);
 
                         return usbvision_new_frame(usbvision, vb->index);
                 }
@@ -4269,8 +4270,8 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
                         if (vb->index == -1)
                                 return -EINVAL;
 
-                        PDEBUG(DBG_IOCTL, "VIDIOC_DQBUF frame=%d, grabstate=%d",
-                                       vb->index, usbvision->frame[vb->index].grabstate);
+                        PDEBUG(DBG_IOCTL, "VIDIOC_DQBUF frame=%d, grabstate=%d, curframeNum=%d",
+                                       vb->index, usbvision->frame[vb->index].grabstate,usbvision->curFrameNum);
 
                         switch (usbvision->frame[vb->index].grabstate) {
                         case FrameState_Unused:
@@ -4295,6 +4296,7 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
                                 errCode = (usbvision->frame[vb->index].grabstate == FrameState_Error) ? -EIO : 0;
                                 vb->memory = V4L2_MEMORY_MMAP;
                                 vb->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE;
+                                vb->field = V4L2_FIELD_NONE;
                                 vb->sequence = usbvision->frame[vb->index].sequence;
                                 usbvision->frame[vb->index].grabstate = FrameState_Unused;
                                 break;
diff --git a/drivers/media/video/usbvision/usbvision-i2c.c b/drivers/media/video/usbvision/usbvision-i2c.c
index e050e5559ac5..466e11f4584e 100644
--- a/drivers/media/video/usbvision/usbvision-i2c.c
+++ b/drivers/media/video/usbvision/usbvision-i2c.c
@@ -39,18 +39,14 @@
 #include <linux/i2c.h>
 #include "usbvision-i2c.h"
 
-static int debug = 0;   
+static int debug_i2c_usb = 0;   
 
 #if defined(module_param)                               // Showing parameters under SYSFS
-module_param (debug, int, 0444);                        // debug mode of the device driver
+module_param (debug_i2c_usb, int, 0444);                        // debug_i2c_usb mode of the device driver
 #else
-MODULE_PARM(debug, "i");                                // debug mode of the device driver
+MODULE_PARM(debug_i2c_usb, "i");                                // debug_i2c_usb mode of the device driver
 #endif
 
-MODULE_AUTHOR("Joerg Heckenbach");
-MODULE_DESCRIPTION("I2C algorithm for USB-I2C-bridges");
-MODULE_LICENSE("GPL");
-
 
 static inline int try_write_address(struct i2c_adapter *i2c_adap,
                                     unsigned char addr, int retries)
@@ -71,7 +67,7 @@ static inline int try_write_address(struct i2c_adapter *i2c_adap,
                         break;
                 udelay(adap->udelay);
         }
-        if (debug) {
+        if (debug_i2c_usb) {
                 if (i) {
                         info("%s: Needed %d retries for address %#2x", __FUNCTION__, i, addr);
                         info("%s: Maybe there's no device at this address", __FUNCTION__);
@@ -98,7 +94,7 @@ static inline int try_read_address(struct i2c_adapter *i2c_adap,
                         break;
                 udelay(adap->udelay);
         }
-        if (debug) {
+        if (debug_i2c_usb) {
                 if (i) {
                         info("%s: Needed %d retries for address %#2x", __FUNCTION__, i, addr);
                         info("%s: Maybe there's no device at this address", __FUNCTION__);
@@ -170,7 +166,7 @@ usb_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
                 pmsg = &msgs[i];
                 ret = usb_find_address(i2c_adap, pmsg, i2c_adap->retries, &addr);
                 if (ret != 0) {
-                        if (debug) {
+                        if (debug_i2c_usb) {
                                 info("%s: got NAK from device, message #%d\n", __FUNCTION__, i);
                         }
                         return (ret < 0) ? ret : -EREMOTEIO;
@@ -236,7 +232,7 @@ int usbvision_i2c_usb_add_bus(struct i2c_adapter *adap)
 
         i2c_add_adapter(adap);
 
-        if (debug) {
+        if (debug_i2c_usb) {
                 info("i2c bus for %s registered", adap->name);
         }
 
@@ -249,7 +245,7 @@ int usbvision_i2c_usb_del_bus(struct i2c_adapter *adap)
 
         i2c_del_adapter(adap);
 
-        if (debug) {
+        if (debug_i2c_usb) {
                 info("i2c bus for %s unregistered", adap->name);
         }
 #ifdef MODULE