Sorry ,
uiomove does not written no of bytes copied from user_space
to kernel space or from kernel space to userspace .My understanding
was wrong .
uiomove returns 0 on success .
Regards,
Rashmi
On 12/12/05, rashmi ns <[EMAIL PROTECTED]> wrote:
> Hello Team,
> when i use "uiomove" in the character device
> interface the no of bytes transfrerred between kernel and userspace is
> zero .but the actual data transferred when trraced through
> "uio->resid" is correct .can any one explain why this is happening ?
>
> /*Character Device Interfaces*/
> static struct cdevsw hdlc_cdevsw = {
>
> .d_maj = CDEV_MAJOR,
> .d_open = hdlc_open,
> .d_read = hdlc_read,
> .d_write = hdlc_write,
> .d_ioctl = hdlc_ioctl,
> .d_close = hdlc_close,
> .d_version = D_VERSION,
> };
> static int hdlc_write(dev_t dev, struct uio *uio, int ioflag)
> {
> int towrite,written; /*char device inf*/
> written=uiomove((void *)write_tx_buffer,towrite,uio);
> uprintf("uio->resid=%d",uio->uio_resid);
> uprintf("No of bytes written =%d",written);
>
>
>
>
> }
>
> Thanks and Regards,
> Rashmi.N.S
>
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