Martin Fuzzey 5553d587a3 tty: serial: imx: fix rs485 rx after tx ... commit 639949a703 upstream. Since commit 79d0224f6b ("tty: serial: imx: Handle RS485 DE signal active high") RS485 reception no longer works after a transmission. The following scenario shows the problem: 1) Open a port in RS485 mode 2) Receive data from remote (OK) 3) Transmit data to remote (OK) 4) Receive data from remote (Nothing received) In RS485 mode, imx_uart_start_tx() calls imx_uart_stop_rx() and, when the transmission is complete, imx_uart_stop_tx() calls imx_uart_start_rx(). Since the above commit imx_uart_stop_rx() now sets the loopback bit but imx_uart_start_rx() does not clear it causing the hardware to remain in loopback mode and not receive external data. Fix this by moving the existing loopback disable code to a helper function and calling it from imx_uart_start_rx() too. Fixes: 79d0224f6b ("tty: serial: imx: Handle RS485 DE signal active high") Cc: stable@vger.kernel.org Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20230616104838.2729694-1-martin.fuzzey@flowbird.group Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-07-23 13:49:41 +02:00
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hvc	hvc/xen: prevent concurrent accesses to the shared ring	2023-03-30 12:49:09 +02:00
ipwireless	…
serdev	…
serial	tty: serial: imx: fix rs485 rx after tx	2023-07-23 13:49:41 +02:00
vt	vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF	2023-05-24 17:32:51 +01:00
Kconfig	…
Makefile	…
amiserial.c	…
ehv_bytechan.c	…
goldfish.c	…
mips_ejtag_fdc.c	…
moxa.c	…
mxser.c	…
n_gsm.c	…
n_hdlc.c	…
n_null.c	…
n_tty.c	…
nozomi.c	…
pty.c	…
rpmsg_tty.c	…
synclink_gt.c	…
sysrq.c	…
tty.h	tty: Prevent writing chars during tcsetattr TCSADRAIN/FLUSH	2023-05-11 23:03:01 +09:00
tty_audit.c	…
tty_baudrate.c	…
tty_buffer.c	…
tty_io.c	tty: Prevent writing chars during tcsetattr TCSADRAIN/FLUSH	2023-05-11 23:03:01 +09:00
tty_ioctl.c	tty: Prevent writing chars during tcsetattr TCSADRAIN/FLUSH	2023-05-11 23:03:01 +09:00
tty_jobctrl.c	…
tty_ldisc.c	…
tty_ldsem.c	…
tty_mutex.c	…
tty_port.c	…
ttynull.c	…
vcc.c	…