13 Aug, 2007

1 commit

• 2464286ac   genirq: suppress resend of level interrupts ... Browse Code »

  Level type interrupts are resent by the interrupt hardware when they are
  still active at irq_enable().

  Suppress the resend mechanism for interrupts marked as level.

  Signed-off-by: Thomas Gleixner
  Signed-off-by: Linus Torvalds

  Thomas Gleixner

  2007-08-13 02:05:45 +0800  

09 Aug, 2007

1 commit

• 88ffc3505   Revert "genirq: temporary fix for level-triggered IRQ resend" ... Browse Code »

  This reverts commit 0fc4969b866671dfe39b1a9119d0fdc7ea0f63e5. It was
  always meant to be temporary, but it's generating more useless noise
  than anything else, and we probably should never have done it in the
  generic kernel (only had the people involved test it on their own).

  Signed-off-by: Linus Torvalds

  Linus Torvalds

  2007-08-09 23:10:16 +0800  

02 Aug, 2007

1 commit

• 0fc4969b8   genirq: temporary fix for level-triggered IRQ resend ... Browse Code »

  Marcin Slusarz reported a ne2k-pci "hung network interface" regression.

  delayed disable relies on the ability to re-trigger the interrupt in the
  case that a real interrupt happens after the software disable was set.
  In this case we actually disable the interrupt on the hardware level
  _after_ it occurred.

  On enable_irq, we need to re-trigger the interrupt. On i386 this relies
  on a hardware resend mechanism (send_IPI_self()).

  Actually we only need the resend for edge type interrupts. Level type
  interrupts come back once enable_irq() re-enables the interrupt line.

  I assume that the interrupt in question is level triggered because it is
  shared and above the legacy irqs 0-15:

  17: 12 IO-APIC-fasteoi eth1, eth0

  Looking into the IO_APIC code, the resend via send_IPI_self() happens
  unconditionally. So the resend is done for level and edge interrupts.
  This makes the problem more mysterious.

  The code in question lib8390.c does

  disable_irq();
  fiddle_with_the_network_card_hardware()
  enable_irq();

  The fiddle_with_the_network_card_hardware() might cause interrupts,
  which are cleared in the same code path again,

  Marcin found that when he disables the irq line on the hardware level
  (removing the delayed disable) the card is kept alive.

  So the difference is that we can get a resend on enable_irq, when an
  interrupt happens during the time, where we are in the disabled region.

  Signed-off-by: Ingo Molnar
  Signed-off-by: Linus Torvalds

  Thomas Gleixner

  2007-08-02 11:46:22 +0800  

07 Oct, 2006

1 commit

• e317c8cca   [PATCH] ixp4xxdefconfig arm fixes ... Browse Code »

  With the following patch, the ixp4xxdefconfig builds correctly. I'll
  test some more configs if I get some time.

  Signed-off-by: Frederik Deweerdt
  Signed-off-by: Linus Torvalds

  Frederik Deweerdt

  2006-10-07 03:11:08 +0800  

17 Sep, 2006

1 commit

• e1ed7ac77   [PATCH] genirq: fix typo in IRQ resend ... Browse Code »

  Fix a bug where the IRQ_PENDING flag is never cleared and the ISR is called
  endlessly without an actual interrupt.

  Signed-off-by: Imre Deak
  Acked-by: Thomas Gleixner
  Acked-by: Ingo Molnar
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Imre Deak

  2006-09-17 03:54:30 +0800  

30 Jun, 2006

2 commits

• 6a6de9ef5   [PATCH] genirq: core ... Browse Code »

  Core genirq support: add the irq-chip and irq-flow abstractions.

  Signed-off-by: Thomas Gleixner
  Signed-off-by: Ingo Molnar
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Thomas Gleixner

  2006-06-30 01:26:24 +0800  
• a4633adcd   [PATCH] genirq: add genirq sw IRQ-retrigger ... Browse Code »

  Enable platforms that do not have a hardware-assisted hardirq-resend mechanism
  to resend them via a softirq-driven IRQ emulation mechanism.

  Signed-off-by: Thomas Gleixner
  Signed-off-by: Ingo Molnar
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Thomas Gleixner

  2006-06-30 01:26:23 +0800