Messages in this thread |  | | From | Timur Aydin <> | Subject | Adjusting destination pointer with copy_to_user | Date | Mon, 12 Feb 2007 11:39:44 +0200 |
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Hi,
I am passing a packet consisting of a fixed length header and a variable length data block to a user mode application. The user mode application passes the pointer of its buffer with an ioctl call (buff_ptr). When the driver receives buff_ptr, it makes two calls to pass the packet to user mode:
copy_to_user(buff_ptr, header, header_size); copy_to_user(buff_ptr + header_size, data, data_size);
Is this a valid usage? Or can I only use buff_ptr here?
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