linux/arch
oftedal ea16058457 Do not skip interrupt sources in sun4d interrupt handler and acknowledge interrupts correctly
During the introduction of genirq on sparc32 bugs were introduced in
the interrupt handler for sun4d. The interrupts handler checks the status
of the various sbus interfaces in the system and generates a virtual
interrupt, based upon the location of the interrupt source. This lookup
was broken by restructuring the code in such a way that index and shift
operations were performed prior to comparing this against the values
read from the interrupt controllers.

This could cause the handler to loop eternally as the interrupt source
could be skipped before any check was performed. Additionally
sun4d_encode_irq performs shifting internally, so it should not be performed
twice.

In sun4d_unmask interrupts were not correctly acknowledged, as the
corresponding bit it the interrupt mask was not actually cleared.

Signed-off-by: Kjetil Oftedal <oftedal@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-07 16:06:33 -07:00
..
alpha Merge branch 'setns' 2011-05-28 10:51:01 -07:00
arm Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-05-28 10:56:34 -07:00
avr32 Merge branch 'setns' 2011-05-28 10:51:01 -07:00
blackfin Blackfin: debug-mmrs: include RSI_PID[4567] MMRs 2011-05-28 17:02:56 -04:00
cris Merge branch 'setns' 2011-05-28 10:51:01 -07:00
frv Merge branch 'setns' 2011-05-28 10:51:01 -07:00
h8300 Merge branch 'setns' 2011-05-28 10:51:01 -07:00
ia64 [IA64] wire up sendmmsg() syscall for Itanium 2011-05-31 10:09:24 -07:00
m32r Merge branch 'setns' 2011-05-28 10:51:01 -07:00
m68k Merge branch 'setns' 2011-05-28 10:51:01 -07:00
microblaze Merge branch 'setns' 2011-05-28 10:51:01 -07:00
mips Merge branch 'setns' 2011-05-28 10:51:01 -07:00
mn10300 Merge branch 'setns' 2011-05-28 10:51:01 -07:00
parisc Merge branch 'setns' 2011-05-28 10:51:01 -07:00
powerpc powerpc/pmac: Don't register pmac PIC syscore ops when HW not present 2011-05-31 20:30:20 +09:00
s390 [S390] mm: fix mmu_gather rework 2011-05-29 12:40:51 +02:00
score arch: remove CONFIG_GENERIC_FIND_{NEXT_BIT,BIT_LE,LAST_BIT} 2011-05-26 17:12:38 -07:00
sh Merge branch 'setns' 2011-05-28 10:51:01 -07:00
sparc Do not skip interrupt sources in sun4d interrupt handler and acknowledge interrupts correctly 2011-06-07 16:06:33 -07:00
tile Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2011-05-29 11:29:28 -07:00
um arch: remove CONFIG_GENERIC_FIND_{NEXT_BIT,BIT_LE,LAST_BIT} 2011-05-26 17:12:38 -07:00
unicore32 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6 2011-05-27 14:27:34 -07:00
x86 Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 2011-06-01 06:45:08 +09:00
xtensa Merge branch 'setns' 2011-05-28 10:51:01 -07:00
.gitignore
Kconfig mm, powerpc: move the RCU page-table freeing into generic code 2011-05-25 08:39:16 -07:00