tree ceae1b6569ea4af8cbba5196f4900ed968b852ab
parent 9ddfa69fb073081882505a4f69d3f0c344d9bcaf
author Valentin Rothberg <Valentin.Rothberg@lip6.fr> 1425038116 +0100
committer Jonathan Corbet <corbet@lwn.net> 1426858915 -0600

MSI-HOWTO.txt: remove reference on IRQF_DISABLED

The IRQF_DISABLED is a NOOP and scheduled to be removed.  According to Ingo
Molnar in commit e58aa3d2d0cc01ad8d6f7f640a0670433f794922 (genirq: Run irq
handlers with interrupts disabled), running IRQ handlers with interrupts
enabled can cause stack overflows when the interrupt line of the issuing
device is still active.

This patch removes IRQF_DISABLED from this documentation.  It was
mentioned to be a solution to avoid deadlocks when a device uses
multiple interrupts.  As the flag is a NOOP this solution does not work
anymore.

Signed-off-by: Valentin Rothberg <Valentin.Rothberg@lip6.fr>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>