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Yoshihiro Shimoda 850a971a4e net: ethernet: ravb: exit if re-initialization fails in tx timeout [ Upstream commit `015c5d5e6a` ] According to the report of [1], this driver is possible to cause the following error in ravb_tx_timeout_work(). ravb e6800000.ethernet ethernet: failed to switch device to config mode This error means that the hardware could not change the state from "Operation" to "Configuration" while some tx and/or rx queue are operating. After that, ravb_config() in ravb_dmac_init() will fail, and then any descriptors will be not allocaled anymore so that NULL pointer dereference happens after that on ravb_start_xmit(). To fix the issue, the ravb_tx_timeout_work() should check the return values of ravb_stop_dma() and ravb_dmac_init(). If ravb_stop_dma() fails, ravb_tx_timeout_work() re-enables TX and RX and just exits. If ravb_dmac_init() fails, just exits. [1] https://lore.kernel.org/linux-renesas-soc/20200518045452.2390-1-dirk.behme@de.bosch.com/ Reported-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-08-05 10:06:52 +02:00
arch	parisc: add support for cmpxchg on u8 pointers	2020-08-05 10:06:52 +02:00
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drivers	net: ethernet: ravb: exit if re-initialization fails in tx timeout	2020-08-05 10:06:52 +02:00
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fs	xfs: fix missed wakeup on l_flush_wait	2020-08-05 10:06:50 +02:00
include	x86, vmlinux.lds: Page-align end of ..page_aligned sections	2020-08-05 10:06:49 +02:00
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kernel	bpf: Fix map leak in HASH_OF_MAPS map	2020-08-05 10:06:51 +02:00
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net	mac80211: mesh: Free pending skb when destroying a mpath	2020-08-05 10:06:51 +02:00
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tools	selftests/net: rxtimestamp: fix clang issues for target arch PowerPC	2020-08-05 10:06:50 +02:00
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README

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

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.