tree 5dfb8739afbfcc49a712fd028f60b3dbd7085a21
parent 388faf9ffdaf92c81243514a2dd4c6ce04d28874
author Qipan Li <Qipan.Li@csr.com> 1388735048 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1389143344 -0800

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>