Hugo Villeneuve 11244a4328 serial: sc16is7xx: fix bug in sc16is7xx_set_baud() when using prescaler ... [ Upstream commit 8492bd91aa ] When using a high speed clock with a low baud rate, the 4x prescaler is automatically selected if required. In that case, sc16is7xx_set_baud() properly configures the chip registers, but returns an incorrect baud rate by not taking into account the prescaler value. This incorrect baud rate is then fed to uart_update_timeout(). For example, with an input clock of 80MHz, and a selected baud rate of 50, sc16is7xx_set_baud() will return 200 instead of 50. Fix this by first changing the prescaler variable to hold the selected prescaler value instead of the MCR bitfield. Then properly take into account the selected prescaler value in the return value computation. Also add better documentation about the divisor value computation. Fixes: dfeae619d7 ("serial: sc16is7xx") Cc: stable@vger.kernel.org Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com> Reviewed-by: Jiri Slaby <jirislaby@kernel.org> Link: https://lore.kernel.org/r/20240430200431.4102923-1-hugo@hugovil.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-06-12 11:12:35 +02:00
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hvc	hvc/xen: fix event channel handling for secondary consoles	2023-11-28 17:19:57 +00:00
ipwireless	…
serdev	…
serial	serial: sc16is7xx: fix bug in sc16is7xx_set_baud() when using prescaler	2024-06-12 11:12:35 +02:00
vt	vt: fix unicode buffer corruption when deleting characters	2024-04-03 15:28:43 +02:00
Kconfig	…
Makefile	…
amiserial.c	…
ehv_bytechan.c	…
goldfish.c	…
mips_ejtag_fdc.c	…
moxa.c	…
mxser.c	…
n_gsm.c	tty: n_gsm: fix missing receive state reset after mode switch	2024-06-12 11:11:18 +02:00
n_hdlc.c	…
n_null.c	…
n_tty.c	…
nozomi.c	…
pty.c	…
rpmsg_tty.c	…
synclink_gt.c	…
sysrq.c	tty/sysrq: replace smp_processor_id() with get_cpu()	2023-11-28 17:19:57 +00:00
tty.h	…
tty_audit.c	…
tty_baudrate.c	…
tty_buffer.c	…
tty_io.c	usb: cdc-acm: return correct error code on unsupported break	2024-01-25 15:35:53 -08:00
tty_ioctl.c	tty: allow TIOCSLCKTRMIOS with CAP_CHECKPOINT_RESTORE	2024-02-05 20:14:32 +00:00
tty_jobctrl.c	tty: tty_jobctrl: fix pid memleak in disassociate_ctty()	2023-11-20 11:59:25 +01:00
tty_ldisc.c	…
tty_ldsem.c	…
tty_mutex.c	…
tty_port.c	…
ttynull.c	…
vcc.c	tty: vcc: Add check for kstrdup() in vcc_probe()	2023-11-28 17:19:45 +00:00