Commit 348fbd61 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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serial: xilinx_uartps: drop low-latency workaround 



Commit c8dbdc84 ("serial: xuartps: Rewrite the interrupt handling
logic") reworked the driver interrupt processing but also, without
comment, added an unnecessary workaround for the infamous low_latency
behaviour of tty_flip_buffer_push() which had been removed years
before.

Specifically, since commit a9c3f68f ("tty: Fix low_latency BUG"),
tty_flip_buffer_push() always schedules a work item to push data to the
line discipline and there's no need to keep any low_latency hacks around.

Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210421095509.3024-27-johan@kernel.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4e11dbb5

drivers/tty/serial/xilinx_uartps.c

+1 −2
Original line number Diff line number Diff line
@@ -301,9 +301,8 @@ static void cdns_uart_handle_rx(void *dev_id, unsigned int isrstatus) 
		tty_insert_flip_char(&port->state->port, data, status);

		isrstatus = 0;

	}

	spin_unlock(&port->lock);



	tty_flip_buffer_push(&port->state->port);

	spin_lock(&port->lock);

}



/**