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For an AHCI controller with AHCI_HFLAG_MULTI_MSI flag set, we may get the following log, regardless of whether a custom irq handler was implemented or not: [ 14.700238] ahci 0000:74:03.0: both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented This is because we can set hpriv->irq_handler to ahci_single_level_irq_intr() if not already set, in ahci_init_one()->ahci_pci_save_initial_config()->ahci_save_initial_config(). Stop having this warn being misleading by adding a check for hpriv->irq_handler != ahci_single_level_irq_intr. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.