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Alex Elder says: ==================== net: ipa: hardware pipeline cleanup fixes There is a procedure currently referred to as a "tag process" that is performed to clear the IPA hardware pipeline--either at the time of a modem crash, or when suspending modem GSI channels. One thing done in this procedure is issuing a command that sends a data packet originating from the AP->command TX endpoint, destined for the AP<-LAN RX (default) endpoint. And although we currently wait for the send to complete, we do *not* wait for the packet to be received. But the pipeline can't be assumed clear until we have actually received this packet. This series addresses this by detecting when the pipeline-clearing packet has been received, and using a completion to allow a waiter to know when that has happened. This uses the IPA status capability (which sends an extra status buffer for certain packets). It also uses the ability to supply a "tag" with a packet, which will be delivered with the packet's status buffer. We tag the data packet that's sent to clear the pipeline, and use the receipt of a status buffer associated with a tagged packet to determine when that packet has arrived. "Tag status" just desribes one aspect of this procedure, so some symbols are renamed to be more like "pipeline clear" so they better describe the larger purpose. Finally, two functions used in this code don't use their arguments, so those arguments are removed. ==================== Link: https://lore.kernel.org/r/20210126185703.29087-1-elder@linaro.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.