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Filename Latest commit message Latest commit date
Soeren Moch 41a531ffa4 rt2x00usb: fix rx queue hang 
Since commit ed194d1367 ("usb: core: remove local_irq_save() around
 ->complete() handler") the handler rt2x00usb_interrupt_rxdone() is
not running with interrupts disabled anymore. So this completion handler
is not guaranteed to run completely before workqueue processing starts
for the same queue entry.
Be sure to set all other flags in the entry correctly before marking
this entry ready for workqueue processing. This way we cannot miss error
conditions that need to be signalled from the completion handler to the
worker thread.
Note that rt2x00usb_work_rxdone() processes all available entries, not
only such for which queue_work() was called.

This patch is similar to what commit df71c9cfce ("rt2x00: fix order
of entry flags modification") did for TX processing.

This fixes a regression on a RT5370 based wifi stick in AP mode, which
suddenly stopped data transmission after some period of heavy load. Also
stopping the hanging hostapd resulted in the error message "ieee80211
phy0: rt2x00queue_flush_queue: Warning - Queue 14 failed to flush".
Other operation modes are probably affected as well, this just was
the used testcase.

Fixes: ed194d1367 ("usb: core: remove local_irq_save() around ->complete() handler")
Cc: stable@vger.kernel.org # 4.20+
Signed-off-by: Soeren Moch <smoch@web.de>
Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2019-07-15 20:52:18 +03:00
arch powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
block for-5.3/block-20190708 2019-07-09 10:45:06 -07:00
certs Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs" 2019-07-10 18:43:43 -07:00
crypto USB / PHY patches for 5.3-rc1 2019-07-11 15:40:06 -07:00
Documentation bonding: add documentation for peer_notif_delay 2019-07-13 19:29:21 -07:00
drivers rt2x00usb: fix rx queue hang 2019-07-15 20:52:18 +03:00
fs for-5.3/io_uring-20190711 2019-07-13 10:36:53 -07:00
include powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
init Kbuild updates for v5.3 2019-07-12 16:03:16 -07:00
ipc
kernel Kbuild updates for v5.3 2019-07-12 16:03:16 -07:00
lib for-5.3/io_uring-20190711 2019-07-13 10:36:53 -07:00
LICENSES
mm Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
net sit: use dst_cache in ipip6_tunnel_xmit 2019-07-14 12:15:28 -07:00
samples Kbuild updates for v5.3 2019-07-12 16:03:16 -07:00
scripts powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
security Merge branch 'akpm' (patches from Andrew) 2019-07-12 11:40:28 -07:00
sound Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
tools powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
usr kbuild: compile-test exported headers to ensure they are self-contained 2019-07-08 23:13:57 +09:00
virt ARM: 2019-07-12 15:35:14 -07:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore kbuild: do not create wrappers for header-test-y 2019-07-09 10:10:27 +09:00
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MAINTAINERS This pull-request contains the following changes for MTD: 2019-07-13 15:42:44 -07:00
Makefile Kbuild updates for v5.3 2019-07-12 16:03:16 -07:00
README

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.