Scull Driver - Read

[sahil aggarwal <sahil.agg15@xxxxxxxxx>]

hi all,

Going through scull driver code, i see read function reads only till
end of 1 quantum, so do kernel call read multiple times if count from
q_pos exceeds quantum size limit.?


Ref: ldd3.

if(count > quantum - q_pos)
count = quantum - q_pos;
if(copy_to_user(buf, dptr->data[s_pos] + q_pos,count)){
retval = -EFAULT;
goto out;
}
*f_pos += count;
retval = count;

Thanks
Regards

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