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Filename Latest commit message Latest commit date
Erwan Le Ray 6e666a05e5 serial: stm32: fix tx_empty condition
[ Upstream commit 3db1d52466dc11dca4e47ef12a6e6e97f846af62 ]

In "tx_empty", we should poll TC bit in both DMA and PIO modes (instead of
TXE) to check transmission data register has been transmitted independently
of the FIFO mode. TC indicates that both transmit register and shift
register are empty. When shift register is empty, tx_empty should return
TIOCSER_TEMT instead of TC value.

Cleans the USART_CR_TC TCCF register define (transmission complete clear
flag) as it is duplicate of USART_ICR_TCCF.

Fixes: 48a6092fb4 ("serial: stm32-usart: Add STM32 USART Driver")
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20210304162308.8984-13-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-14 09:44:17 +02:00
arch ARM: dts: exynos: correct PMIC interrupt trigger level on Snow 2021-05-14 09:44:16 +02:00
block
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drivers serial: stm32: fix tx_empty condition 2021-05-14 09:44:17 +02:00
fs ovl: fix missing revert_creds() on error path 2021-05-14 09:44:16 +02:00
include KVM: Stop looking for coalesced MMIO zones if the bus is destroyed 2021-05-14 09:44:15 +02:00
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net cfg80211: scan: drop entry from hidden_list on overflow 2021-05-14 09:44:13 +02:00
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sound ALSA: hda/realtek: ALC285 Thinkpad jack pin quirk is unreachable 2021-05-14 09:44:15 +02:00
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virt KVM: Stop looking for coalesced MMIO zones if the bus is destroyed 2021-05-14 09:44:15 +02:00
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Makefile Linux 5.4.118 2021-05-11 14:04:18 +02:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.