From: Magnus Damm <magnus.damm@gmail.com>
To: linux-sh@vger.kernel.org
Subject: [PATCH] ARM: mach-shmobile: AG5EVM GIC Sparse IRQ fix
Date: Tue, 22 Nov 2011 06:31:40 +0000 [thread overview]
Message-ID: <20111122063140.31045.57736.sendpatchset@w520> (raw)
From: Magnus Damm <damm@opensource.se>
Fix IRQ support on the AG5EVM board. The sh73a0 and the AG5EVM
board make use of the ARM GIC hardware block as main interrupt
controller. The following commit changed the default behaviour
for non-device tree platforms and broke AG5EVM irq support:
f37a53c ARM: gic: fix irq_alloc_descs handling for sparse irq
Without this fix the following warning triggers at boot:
NR_IRQS:1024 nr_irqs:1024 1024
------------[ cut here ]------------
WARNING: at arch/arm/common/gic.c:607 gic_init+0x90/0x2e4()
Cannot allocate irq_descs @ IRQ16, assuming pre-allocated
[<c000c868>] (unwind_backtrace+0x0/0xe0) from [<c001857c>] (warn_slowpath_commo)
[<c001857c>] (warn_slowpath_common+0x48/0x60) from [<c00185d8>] (warn_slowpath_)
[<c00185d8>] (warn_slowpath_fmt+0x2c/0x3c) from [<c029ee08>] (gic_init+0x90/0x2)
[<c029ee08>] (gic_init+0x90/0x2e4) from [<c029f278>] (sh73a0_init_irq+0x30/0x18)
[<c029f278>] (sh73a0_init_irq+0x30/0x184) from [<c029c0b4>] (init_IRQ+0x14/0x1c)
[<c029c0b4>] (init_IRQ+0x14/0x1c) from [<c029a5cc>] (start_kernel+0x15c/0x2b8)
[<c029a5cc>] (start_kernel+0x15c/0x2b8) from [<4000803c>] (0x4000803c)
---[ end trace 1b75b31a2719ed1c ]---
With this fix applied interrupts work as expected.
Signed-off-by: Magnus Damm <damm@opensource.se>
---
arch/arm/mach-shmobile/board-ag5evm.c | 1 +
1 file changed, 1 insertion(+)
--- 0001/arch/arm/mach-shmobile/board-ag5evm.c
+++ work/arch/arm/mach-shmobile/board-ag5evm.c 2011-11-17 18:35:51.000000000 +0900
@@ -607,6 +607,7 @@ struct sys_timer ag5evm_timer = {
MACHINE_START(AG5EVM, "ag5evm")
.map_io = ag5evm_map_io,
+ .nr_irqs = NR_IRQS_LEGACY,
.init_irq = sh73a0_init_irq,
.handle_irq = shmobile_handle_irq_gic,
.init_machine = ag5evm_init,
next reply other threads:[~2011-11-22 6:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-22 6:31 Magnus Damm [this message]
2011-11-22 14:12 ` [PATCH] ARM: mach-shmobile: AG5EVM GIC Sparse IRQ fix Rob Herring
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