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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2019-07-29 12:52:19 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-04 12:43:48 +0200 |
| commit | 8a9b82422ff5b8d4a7dffacd82208b083363b56c (patch) | |
| tree | 51d05e7eb91e3e452e38ac8d271c5ec8cfe8d8ed /drivers/tty | |
| parent | a90fa53282f33721cbedeaa7c86dc2a037246319 (diff) | |
| download | linux-8a9b82422ff5b8d4a7dffacd82208b083363b56c.tar.bz2 | |
tty: serial: fsl_lpuart: Drop unnecessary lpuart*_stop_tx()
By the time lpuart_shutdown() calls lpuart_stop_tx() UARTCR2_TE and
UARTCR2_TIE (which the latter will clear) are already cleared, so that
function call should effectively be a no-op. Moreso, lpuart_stop_tx()
is expected to be executed with port spinlock held, which the caller
doesn't. Given all that, drop the call to lpuart_stop_tx() in
lpuart_shutdown().
In case of lpuart32_shutdown()/lpuart32_stop_tx(), TIE won't even be
set if lpuart_dma_tx_use is true. Drop it there as well.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-imx@nxp.com
Cc: linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Link: https://lore.kernel.org/r/20190729195226.8862-18-andrew.smirnov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index e59dd90fc34c..2597a877d639 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1574,8 +1574,6 @@ static void lpuart_shutdown(struct uart_port *port) sport->dma_tx_in_progress = false; dmaengine_terminate_all(sport->dma_tx_chan); } - - lpuart_stop_tx(port); } } @@ -1607,8 +1605,6 @@ static void lpuart32_shutdown(struct uart_port *port) sport->dma_tx_in_progress = false; dmaengine_terminate_all(sport->dma_tx_chan); } - - lpuart32_stop_tx(port); } } |