9692df0581
request/free_irq() can result in a hang because the interrupt thread did not reach the thread function and got stopped in the kthread core already. That leaves a state active counter arround which makes a invocation of synchronized_irq() on that interrupt hang forever. Ensure that the thread reached the thread function in request_irq() to prevent that. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmJ3sG0THHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYoWi/D/wJ71FPiZa2nF+1FfobjQtUmp+YK3kc 6BRSUjrHQ/xhZCjBKEgDcxLC23qzBbjC3e/JfN08rV31iMYOv9onNKorDpO69XkA FV+8kJsJcbxJMLHcn/tLgM97eIRYCWIzvAjfB2FaOR+QXPV3dc2sVB2E9mF1ZKfz cEEmcBW9apv9gnX4vujsQTBToakUZpeMi0TYQq/48hXABIrian4uN2p+lv9kVIg7 Z6+GCm3t/uUVIn4DQe3+aP10UzpHdC/y0fhv62LOCNu4v/eGRdbQ3n2fefsANPRa gaQTaBhuRYc5c123x5HHhYDzYPXWpJOSOtJj2Hk4Ags4Q5oiaute5Q0cZR8uUv49 yHm8UWTlaA3HrQRZbvnwXxUPucL+lcWTuItjseCMHXke8t2n6dKlt3IvwuFVl7XI Mxgc5GD8dDjuYmDFdtxSAJnzzSJ610X5fzgO38cymnMi4Cf8c/N5SvFWnxAz7AnW SCUUwwFNs3+gWSrIVfMS45N0tDF3CXIxpd/vMpVMJsEuJgMwTw+qccEtQHavu2GW I0dO9JJMlTMXqJP3I++CWSUhRuIhaBwyf9wybLWj1WrBtQAcdhORSd9NU38CfdVC 9Zr3MzaqdjJJeZM4D7SlgBnU2bj6s2QlkaR2H0ZXAOe0ItANz0+tndJJ77C8+7ru Q/s19KqojfIUsw== =f7Ph -----END PGP SIGNATURE----- Merge tag 'irq-urgent-2022-05-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fix from Thomas Gleixner: "A fix for the threaded interrupt core. A quick sequence of request/free_irq() can result in a hang because the interrupt thread did not reach the thread function and got stopped in the kthread core already. That leaves a state active counter arround which makes a invocation of synchronized_irq() on that interrupt hang forever. Ensure that the thread reached the thread function in request_irq() to prevent that" * tag 'irq-urgent-2022-05-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq: Synchronize interrupt thread startup
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.