1dfbea041f
The motivation for introducing the check that we only enable breadcrumb irqs if the device's irq was installed was once upon a time we waited during suspend after disabling interrupts (which was quite slow until the bug was discovered). Since then we have the notion of pinning the breadcrumb irq, broadening it from the sole purpose of user interrupt notification and waiting, and more importantly decoupling it from a very defined time period during which enabling the irq was expected. So stop insisting the irq is installed before we setup our IMR masks, if the IER isn't yet enabled, nothing will happen and we will timeout instead, revealing the lack of irq in the hang debug messages. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190117233126.30165-1-chris@chris-wilson.co.uk
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.