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Each interrupter has an interrupt pending (IP) bit that should be cleared in the interrupt handler. This is done automatically for systems using MSI/MSI-X interrupts. Secondary interrupters used by audio offload may not actually trigger MSI/MSI-X messages, so driver may need to clear the IP bit manually for these, even if the primary interrupter IP is cleared automatically. Add an ip_autoclear flag to each interrupter that driver can configure when requesting an interrupt for that xHC interrupter, and move the interrupt pending clearing code to its own helper function. Use this ip_autoclear flag instead of the current hcd->msi_enabled to check if IP flag is cleared by software. [Moved ip_autoclear into xhci and set based on msi_enabled -wcheng] Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> Link: https://lore.kernel.org/r/20240217001017.29969-2-quic_wcheng@quicinc.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.