diff options
| author | Sekhar Nori <nsekhar@ti.com> | 2015-12-15 19:56:12 +0530 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-04-13 17:14:24 -0400 |
| commit | 1505f5ae8ac52b4c9cda088ca8113e1f0ec2f32f (patch) | |
| tree | c95b8f3ee44ce037f70bb3edbb1a3aff0ee56a16 /drivers/gpu | |
| parent | 249ee7541e9bfc313cbe11f2816e902f9612ceec (diff) | |
irqchip/omap-intc: Add support for spurious irq handling
[ Upstream commit d3b421cd07e4c0d4d6c0bbd55ca169c054fc081d ]
Under some conditions, irq sorting procedure used by INTC can go wrong
resulting in a spurious irq getting reported.
If this condition is not handled, it results in endless stream of:
unexpected IRQ trap at vector 00
messages from ack_bad_irq()
Handle the spurious interrupt condition in omap-intc driver to prevent this.
Measurements using kernel function profiler on AM335x EVM running at 720MHz
show that after this patch omap_intc_handle_irq() takes about 37.4us against
34us before this patch.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/9c78a6db02ac55f7af7371b417b6e414d2c3095b.1450188128.git.nsekhar@ti.com
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/gpu')
0 files changed, 0 insertions, 0 deletions