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  1. Nov 24, 2011
    • Magnus Damm's avatar
      ARM: mach-shmobile: AG5EVM GIC Sparse IRQ fix · eded9143
      Magnus Damm authored
      
      
      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:
      
      f37a53cc 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: default avatarMagnus Damm <damm@opensource.se>
      Acked-by: default avatarRob Herring <rob.herring@calxeda.com>
      Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
      eded9143
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