On Sunday 25 November 2007, Benjamin Herrenschmidt wrote:
While there, any reason why we do the read of the interenable register
and mask ? Is that actually useful in practice ? I haven't removed it
but it might be a good candidate if we want to save on MMIO reads.
The code uses that register
From: Benjamin Herrenschmidt [EMAIL PROTECTED]
Subject: [PATCH 1/2] usb: Remove broken optimisation in OHCI IRQ handler
The OHCI IRQ handler has an optimisation that avoids reading some
chip registers when the controller reports that the interrupt was
triggered *only* because completed requests
