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libata currently attempts to reset even if the SATA disk is unplugged. To avoid the meaningless reset of a missing disk, libsas should report offline status to libata. libata already provides a .prereset callback for this purpose. This is called by ata_eh_reset() and can be used to influence whether a reset attempt should be made. Add sas_ata_preset callback to check status of phy and disk. If the disk is already offline or phy is disabled, we return -ENOENT to libata to avoid the reset. Link: https://lore.kernel.org/r/1595408643-63011-3-git-send-email-luojiaxing@huawei.com Reviewed-by: John Garry <john.garry@huawei.com> Reviewed-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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| 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.