Pali Rohár 027b57170b serial: core: Fix initializing and restoring termios speed ... Since commit edc6afc549 ("tty: switch to ktermios and new framework") termios speed is no longer stored only in c_cflag member but also in new additional c_ispeed and c_ospeed members. If BOTHER flag is set in c_cflag then termios speed is stored only in these new members. Therefore to correctly restore termios speed it is required to store also ispeed and ospeed members, not only cflag member. In case only cflag member with BOTHER flag is restored then functions tty_termios_baud_rate() and tty_termios_input_baud_rate() returns baudrate stored in c_ospeed / c_ispeed member, which is zero as it was not restored too. If reported baudrate is invalid (e.g. zero) then serial core functions report fallback baudrate value 9600. So it means that in this case original baudrate is lost and kernel changes it to value 9600. Simple reproducer of this issue is to boot kernel with following command line argument: "console=ttyXXX,86400" (where ttyXXX is the device name). For speed 86400 there is no Bnnn constant and therefore kernel has to represent this speed via BOTHER c_cflag. Which means that speed is stored only in c_ospeed and c_ispeed members, not in c_cflag anymore. If bootloader correctly configures serial device to speed 86400 then kernel prints boot log to early console at speed speed 86400 without any issue. But after kernel starts initializing real console device ttyXXX then speed is changed to fallback value 9600 because information about speed was lost. This patch fixes above issue by storing and restoring also ispeed and ospeed members, which are required for BOTHER flag. Fixes: edc6afc549 ("[PATCH] tty: switch to ktermios and new framework") Cc: stable@vger.kernel.org Signed-off-by: Pali Rohár <pali@kernel.org> Link: https://lore.kernel.org/r/20211002130900.9518-1-pali@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-10-05 15:02:44 +02:00
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acpi	Revert "ACPI: Add memory semantics to acpi_os_map_memory()"	2021-09-23 20:39:36 +02:00
asm-generic	pci_iounmap'2: Electric Boogaloo: try to make sense of it all	2021-09-19 17:13:35 -07:00
clocksource	…
crypto	…
drm	…
dt-bindings	linux-watchdog 5.15-rc1 tag	2021-09-07 13:52:46 -07:00
keys	…
kunit	…
kvm	…
linux	serial: core: Fix initializing and restoring termios speed	2021-10-05 15:02:44 +02:00
math-emu	…
media	…
memory	…
misc	…
net	net: dsa: tear down devlink port regions when tearing down the devlink port on error	2021-09-19 13:05:44 +01:00
pcmcia	…
ras	…
rdma	…
scsi	scsi: core: Remove 'current_tag'	2021-09-22 00:13:38 -04:00
soc	…
sound	…
target	…
trace	Changes since last update:	2021-09-25 11:31:48 -07:00
uapi	Char/Misc driver fixes for 5.15-rc3	2021-09-25 10:29:14 -07:00
vdso	…
video	…
xen	swiotlb-xen: this is PV-only on x86	2021-09-20 17:01:21 +02:00