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| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-06 09:32:47 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-06 09:32:47 +0100 |
| commit | f5bced9f34355d2b12779eebdf2634cb27c18cff (patch) | |
| tree | d636906d3aeb78eecc48b6d1e5d0b44b58cd8016 /drivers/tty/serial/serial_core.c | |
| parent | tty: mips_ejtag_fdc: Make use of the helper function kthread_run_on_cpu() (diff) | |
| parent | Linux 5.16-rc4 (diff) | |
| download | linux-dev-f5bced9f34355d2b12779eebdf2634cb27c18cff.tar.xz linux-dev-f5bced9f34355d2b12779eebdf2634cb27c18cff.zip | |
Merge 5.16-rc4 into tty-next
We need the tty/serial driver fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/serial_core.c')
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index a8750927f03c..29f4781db387 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1075,6 +1075,11 @@ uart_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) goto out; if (!tty_io_error(tty)) { + if (uport->rs485.flags & SER_RS485_ENABLED) { + set &= ~TIOCM_RTS; + clear &= ~TIOCM_RTS; + } + uart_update_mctrl(uport, set, clear); ret = 0; } @@ -1549,6 +1554,7 @@ static void uart_tty_port_shutdown(struct tty_port *port) { struct uart_state *state = container_of(port, struct uart_state, port); struct uart_port *uport = uart_port_check(state); + char *buf; /* * At this point, we stop accepting input. To do this, we @@ -1570,8 +1576,18 @@ static void uart_tty_port_shutdown(struct tty_port *port) */ tty_port_set_suspended(port, 0); - uart_change_pm(state, UART_PM_STATE_OFF); + /* + * Free the transmit buffer. + */ + spin_lock_irq(&uport->lock); + buf = state->xmit.buf; + state->xmit.buf = NULL; + spin_unlock_irq(&uport->lock); + if (buf) + free_page((unsigned long)buf); + + uart_change_pm(state, UART_PM_STATE_OFF); } static void uart_wait_until_sent(struct tty_struct *tty, int timeout) |