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Alex Elder 6ffddf3b3d net: ipa: use state to determine channel command success
The result of issuing a channel control command should be that the
channel changes state.  If enabled, a completion interrupt signals
that the channel state has changed.  This interrupt is enabled by
gsi_channel_command() and disabled again after the command has
completed (or we time out).

There is a window of time--after the completion interrupt is disabled
but before the channel state is read--during which the command could
complete successfully without interrupting.  This would cause the
channel to transition to the desired new state.

So whether a channel command ends via completion interrupt or
timeout, we can consider the command successful if the channel
has entered the desired state (and a failure if it has not,
regardless of the cause).

Fixes: d6c9e3f506 ("net: ipa: only enable generic command completion IRQ when needed");
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-23 12:17:48 -08:00
Documentation docs: netdev-FAQ: fix question headers formatting 2020-12-22 19:28:24 -08:00
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arch OpenRISC updates for 5.11 2020-12-17 13:41:27 -08:00
block SCSI misc on 20201216 2020-12-16 13:34:31 -08:00
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drivers net: ipa: use state to determine channel command success 2020-12-23 12:17:48 -08:00
fs Tracing updates for 5.11 2020-12-17 13:22:17 -08:00
include ppp: Fix PPPIOCUNBRIDGECHAN request number 2020-12-21 17:36:48 -08:00
init for-5.11/block-2020-12-14 2020-12-16 12:57:51 -08:00
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net Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2020-12-18 18:07:14 -08:00
samples ARM: SoC drivers for v5.11 2020-12-16 16:38:41 -08:00
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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.