From: Timur Aydin <ta@taydin.org>
To: linux-kernel@vger.kernel.org
Subject: Adjusting destination pointer with copy_to_user
Date: Mon, 12 Feb 2007 11:39:44 +0200 [thread overview]
Message-ID: <87ire7af4v.fsf@bonsai.taydin.org> (raw)
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?
Timur
reply other threads:[~2007-02-12 10:05 UTC|newest]
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