David S. Miller 227c331178 sparc64: Fix wedged irq regression. ... Kernel bugzilla 10273 As reported by Jos van der Ende, ever since commit 5a606b72a4 ("[SPARC64]: Do not ACK an INO if it is disabled or inprogress.") sun4u interrupts can get stuck. What this changset did was add the following conditional to the various IRQ chip ->enable() handlers on sparc64: if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS))) return; which is correct, however it means that special care is needed in the ->enable() method. Specifically we must put the interrupt into IDLE state during an enable, or else it might never be sent out again. Setting the INO interrupt state to IDLE resets the state machine, the interrupt input to the INO is retested by the hardware, and if an interrupt is being signalled by the device, the INO moves back into TRANSMIT state, and an interrupt vector is sent to the cpu. The two sun4v IRQ chip handlers were already doing this properly, only sun4u got it wrong. Signed-off-by: David S. Miller <davem@davemloft.net>		2008-04-26 21:41:15 -07:00
..
boot	[SPARC64]: Add .gitignore file for sparc64 boot images.	2006-02-05 00:15:11 -08:00
kernel	sparc64: Fix wedged irq regression.	2008-04-26 21:41:15 -07:00
lib	[SPARC64]: Fix inconsistent .section usage in lib/	2008-01-31 19:32:44 -08:00
math-emu	[SPARC64]: small Makefile cleanups	2007-10-22 02:32:10 -07:00
mm	[SPARC64]: %l6 trap return handling no longer necessary.	2008-04-24 03:15:22 -07:00
oprofile	Combine instrumentation menus in kernel/Kconfig.instrumentation	2007-10-19 11:53:54 -07:00
prom	[SPARC]: Kill 'prom_palette'.	2008-02-18 15:28:16 -08:00
defconfig	[SPARC64]: Add NUMA support.	2008-04-23 23:32:17 -07:00
Kconfig	[SPARC64]: Add NUMA support.	2008-04-23 23:32:17 -07:00
Kconfig.debug	[SPARC64]: Remove DEBUG_BOOTMEM.	2008-02-13 01:00:26 -08:00
Makefile	[SPARC]: Remove SunOS and Solaris binary support.	2008-04-21 15:10:15 -07:00