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| author |   Xiongfeng Wang <wangxiongfeng2@huawei.com> | 2019-12-06 15:37:43 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-10 14:28:48 +0100 |
| commit | e83c6587c47caa2278aa3bd603b5a85eddc4cec9 (patch) | |
| tree | 314ee1681fa2405d887f96d361dd3db9c31ceb8d /drivers/tty/serial/omap-serial.c | |
| parent | Linux 5.5-rc1 (diff) | |
| download | linux-dev-e83c6587c47caa2278aa3bd603b5a85eddc4cec9.tar.xz linux-dev-e83c6587c47caa2278aa3bd603b5a85eddc4cec9.zip | |
tty: omap-serial: remove set but unused variable
Fix the following warning:
drivers/tty/serial/omap-serial.c: In function serial_omap_rlsi:
drivers/tty/serial/omap-serial.c:496:16: warning: variable ch set but not used [-Wunused-but-set-variable]
The character read is useless according to the table 23-246 of the omap4
TRM. So we can drop it.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Link: https://lore.kernel.org/r/1575617863-32484-1-git-send-email-wangxiongfeng2@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/omap-serial.c')
| -rw-r--r-- | drivers/tty/serial/omap-serial.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 6420ae581a80..5f808d8dfcd5 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -493,10 +493,13 @@ static unsigned int check_modem_status(struct uart_omap_port *up) static void serial_omap_rlsi(struct uart_omap_port *up, unsigned int lsr) { unsigned int flag; - unsigned char ch = 0; + /* + * Read one data character out to avoid stalling the receiver according + * to the table 23-246 of the omap4 TRM. + */ if (likely(lsr & UART_LSR_DR)) - ch = serial_in(up, UART_RX); + serial_in(up, UART_RX); up->port.icount.rx++; flag = TTY_NORMAL; |