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Linux kernel stable tree
15d54840ec
Delay requesting the IRQ until the machine-drv calls set_jack. The main reason for this is that the codec's IRQ is unused on some boards, in which case we really should not call request_irq at all. On some boards there is an IRQ listed at index 0 for the codec, but this is not connected to the codec, but rather is directly connected to the jack's jack-detect pin. These special setups will be handled by the machine-driver, but the machine driver can only request the IRQ if it is not first requested by the codec driver. Moving the request_irq to the set_jack callback (which will not get called in this case) avoids the codec-driver clobbering the IRQ. Moving the request_irq also removes the need to disable the IRQ immediately after requesting it, avoiding a small race (this could also have been fixed by using the new IRQF_NO_AUTOEN flag when requesting the IRQ). Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20210819190543.784415-3-hdegoede@redhat.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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| kernel | ||
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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.