tree 1ca3d97a0cf83fce6287ce201af6acdb2ee60e3f
parent 4d46a67a3eb827ccf1125959936fd51ba318dabc
author Alexander Sverdlin <alexander.sverdlin@nokia.com> 1426683921 +0100
committer Ralf Baechle <ralf@linux-mips.org> 1428673302 +0200

MIPS: Octeon: Remove udelay() causing huge IRQ latency

udelay() in PCI/PCIe read/write callbacks cause 30ms IRQ latency on Octeon
platforms because these operations are called from PCI_OP_READ() and
PCI_OP_WRITE() under raw_spin_lock_irqsave().

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: linux-mips@linux-mips.org
Cc: David Daney <ddaney@cavium.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Masanari Iida <standby24x7@gmail.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Mathias <mathias.rulf@nokia.com>
Patchwork: https://patchwork.linux-mips.org/patch/9576/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>