From: Qipan Li <Qipan.Li@csr.com>
Date: Fri, 3 Jan 2014 07:44:08 +0000 (+0800)
Subject: serial: sirf: correct condition for fetching dma buffer into tty
X-Git-Tag: v3.14-rc1~149^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df8d4aa0d84995bf7fb8d8a978a0d67fff6ca53a;p=pandora-kernel.git

serial: sirf: correct condition for fetching dma buffer into tty

In rx dma-callback it calls tasklet_schedule, if the tasklet
be scheduled after all the dma-callback in the rx dma channel,
current check condition in the tasklet will not do fetch dma
buffer into tty because tx_issued is equal with tx_completed,
so as timeout tasklet does.

so we check whether we should fetch the whole dma buffer into
tty according to the status of transactions in rx dma channel.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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