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[ Upstream commit 2df74b6985b51e77756e2e8faa16c45ca3ba53c5 ] In UFS host reset and restore path, before probe, we stop and start the host controller once. After host controller is stopped, the pending requests, if any, are cleared from the doorbell, but no completion IRQ would be raised due to the hba is stopped. These pending requests shall be completed along with the first NOP_OUT command (as it is the first command which can raise a transfer completion IRQ) sent during probe. Since the OCSs of these pending requests are not SUCCESS (because they are not yet literally finished), their UPIUs shall be dumped. When there are multiple pending requests, the UPIU dump can be overwhelming and may lead to stability issues because it is in atomic context. Therefore, before probe, complete these pending requests right after host controller is stopped and silence the UPIU dump from them. Link: https://lore.kernel.org/r/1574751214-8321-5-git-send-email-cang@qti.qualcomm.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Tested-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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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.