[cpia] USB CAM crash

[Jacob Nikom]

Hi Piero,

I have the same behavior. Johannes Erdfelt said that
it is fixed in pre6 but maybe it did not get in yet.
You could verify that the latest patch is over there.
Go to the directory:
/usr/src/linux/drivers/char

Look at the file cpia.c. Starting from the line 1579
you should see the code from the patch:
        retval = cam->ops->transferCmd(cam->lowlevel_data, cmd, data);
-       if (retval)
+       if (retval) {
                DBG("%x - failed, retval=%d\n", command, retval);
-       else {
+               if (command == CPIA_COMMAND_GetColourParams ||
+                   command == CPIA_COMMAND_GetColourBalance ||
+                   command == CPIA_COMMAND_GetExposure)
+                       up(&cam->param_lock);
+       } else {
                switch(command) {
                case CPIA_COMMAND_GetCPIAVersion:
                        cam->params.version.firmwareVersion = data[0];

I did not recompiled my kernel yet to verify the fix.

Regards,

Jacob Nikom


Piero Campanelli wrote:
> 
> Hi.
> 
> I am loading kernel 2.3.99pre6 (so I think with the latest patchs of cpia
> driver). However after 30 minutes drivers crash !
> When i do a new videocapture I receive:
> 
> Can't open device /dev/video
> 
> So the only thing I can do is to reboot the machine. Could you help me ?
> Evetnually how can i refix it without rebooting ?
> 
> Tnx
> 
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