Hello, Pete Can ccid be suit for any USB smart card reader? I will check it from ccid's homepage. The "right" case I mean is that in kernel 2.6.11, my device driver works find and the return value of copy_to_user is 4. So I thought this is the "right" return value.
Is there any difference between copy_to_user on kernel 2.6.11 and copy_to_user on kernel 2.6.8? In which cases will copy_to_user system call return a non-zero value? Best regards, TowerGee On 2/9/06, Pete Zaitcev <[EMAIL PROTECTED]> wrote: > On Thu, 9 Feb 2006 15:12:10 +0800, mail mail <[EMAIL PROTECTED]> wrote: > > > I wrote a USB smart card device driver for kernel 2.6. > > Why don't you use ccid? > > > In the right case, the return value of copy_to_user should be 4 on my > > PC, and 4 is also the value on kernel 2.6.11 which can run the driver > > successfully. > > How is this a "right" case? The return value of copy_to_user is the > number of bytes which were NOT copied. Any nonzero value is an error! > > -- Pete > ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid3432&bid#0486&dat1642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
