Hi Sylvain,
On Mon, Mar 15, 2010 at 10:13:52AM +0000, Centelles, Sylvain wrote:
> I'm currently working on a spi driver for Intel platform, and when reading
> the various other spi drivers available in the kernel, I saw the msg->status
> was often updated (EINPROGRESS for example), but could not figure out who
> checks this status. I would have thought it would be needed to prevent
> concurrent access for example, but I didn't see anything in the core, nore
> in any driver. If it's not needed, then I would not like to carry some
> useless status updates in the driver I'm currently working on.
> Maybe I missed something... So if someone can please give some info on this,
> it would be great!
See the spi_sync() function in drivers/spi/spi.c. Following is a snippet from
this function:
if (status == 0) {
wait_for_completion(&done);
status = message->status;
}
message->context = NULL;
return status;
baruch
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