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Maciej W. Rozycki 5359b938c0 MIPS: DECstation I/O ASIC DMA interrupt handling fix 
This change complements commit d0da7c002f7b2a93582187a9e3f73891a01d8ee4
and brings clear_ioasic_irq back, renaming it to clear_ioasic_dma_irq at
the same time, to make I/O ASIC DMA interrupts functional.

Unlike ordinary I/O ASIC interrupts DMA interrupts need to be deasserted
by software by writing 0 to the respective bit in I/O ASIC's System
Interrupt Register (SIR), similarly to how CP0.Cause.IP0 and CP0.Cause.IP1
bits are handled in the CPU (the difference is SIR DMA interrupt bits are
R/W0C so there's no need for an RMW cycle).  Otherwise the handler is
reentered over and over again.

The only current user is the DEC LANCE Ethernet driver and its extremely
uncommon DMA memory error handler that does not care when exactly the
interrupt is cleared.  Anticipating the use of DMA interrupts by the Zilog
SCC driver this change however exports clear_ioasic_dma_irq for device
drivers to choose the right application-specific sequence to clear the
request explicitly rather than calling it implicitly in the .irq_eoi
handler of `struct irq_chip'.  Previously these interrupts were cleared in
the .end handler of the said structure, before it was removed.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5826/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 		2013-09-13 11:57:40 +02:00
..
dec MIPS: DECstation I/O ASIC DMA interrupt handling fix 2013-09-13 11:57:40 +02:00
emma MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
fw MIPS: sibyte: Declare the cfe_write() buffer as constant 2013-06-21 18:07:02 +02:00
ip32 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
lasat MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-ar7 Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET" 2013-07-01 15:10:58 +02:00
mach-ath79 MIPS: ath79: Don't hardwire cpu_has_dsp{2} to 0 2013-09-03 23:22:16 +02:00
mach-au1x00 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-bcm47xx MIPS: BCM47XX: add bcm47xx prefix in front of nvram function names 2013-02-15 19:01:57 +01:00
mach-bcm63xx MIPS: BCM63XX: export PSI size from nvram 2013-08-05 18:58:55 +01:00
mach-cavium-octeon MIPS: OCTEON: Select ARCH_REQUIRE_GPIOLIB 2013-08-26 15:33:40 +02:00
mach-cobalt MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-db1x00 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-dec MIPS: PMC-Sierra Yosemite: Remove support. 2012-12-13 18:15:30 +01:00
mach-emma2rh MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-generic MIPS: Fix multiple definitions of UNCAC_BASE. 2013-07-30 18:40:40 +02:00
mach-ip22 MIPS: PMC-Sierra Yosemite: Remove support. 2012-12-13 18:15:30 +01:00
mach-ip27 MIPS: IP27: Fix build error with CONFIG_MAPPED_KERNEL 2013-06-21 18:07:00 +02:00
mach-ip28 Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET" 2013-07-01 15:10:58 +02:00
mach-ip32 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-jazz MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-jz4740 MIPS: jz4740: Remove custom DMA API 2013-07-05 11:40:52 +05:30
mach-lantiq MIPS: Lantiq: Falcon: add cpu-feature-override.h 2013-09-03 23:22:16 +02:00
mach-lasat MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-loongson MIPS: Build uasm-generated code only once to avoid CPU Hotplug problem 2013-05-08 01:19:06 +02:00
mach-loongson1 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-malta MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-netlogic Merge branch 'mips-next' of http://dev.phrozen.org/githttp/mips-next into mips-for-linux-next 2012-12-13 19:40:13 +01:00
mach-pmcs-msp71xx MIPS: MSP71xx: Remove gpio drivers 2013-06-18 00:31:31 +02:00
mach-pnx833x MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-powertv MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-ralink MIPS: ralink: mt7620: Add cpu-feature-override header 2013-09-04 16:58:31 +02:00
mach-rc32434 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-rm MIPS: PMC-Sierra Yosemite: Remove support. 2012-12-13 18:15:30 +01:00
mach-sead3 MIPS: microMIPS: Disable LL/SC and fix linker bug. 2013-05-09 17:55:19 +02:00
mach-sibyte MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mach-tx39xx MIPS: PMC-Sierra Yosemite: Remove support. 2012-12-13 18:15:30 +01:00
mach-tx49xx MIPS: PMC-Sierra Yosemite: Remove support. 2012-12-13 18:15:30 +01:00
mach-vr41xx MIPS: PMC-Sierra Yosemite: Remove support. 2012-12-13 18:15:30 +01:00
mips-boards MIPS: malta: Remove software reset defines from generic header. 2013-06-21 18:07:01 +02:00
netlogic MIPS: Netlogic: Add support for USB on XLP2xx 2013-09-03 23:22:20 +02:00
octeon MIPS: Move declaration of Octeon function fixup_irqs() to header. 2013-09-03 18:19:28 +02:00
pci MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sgi MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sibyte MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sn MIPS: IP27: Remove pfn_t. 2013-05-08 03:51:58 +02:00
txx9 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
vr41xx MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
xtalk MIPS: IP27: Fix build errors with CONFIG_PCI disabled. 2013-06-21 18:07:00 +02:00
Kbuild MIPS: use generic-y where possible 2013-08-26 15:31:52 +02:00
abi.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
addrspace.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
amon.h
…
arch_hweight.h
…
asm-offsets.h
…
asm.h MIPS: microMIPS: Optimise 'memset' core library function. 2013-05-09 17:55:19 +02:00
asmmacro-32.h
…
asmmacro-64.h
…
asmmacro.h
…
atomic.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
barrier.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
bcache.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
bitops.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
bmips.h MIPS: BMIPS: Fix compilation for BMIPS5000 2013-08-26 15:31:55 +02:00
bootinfo.h MIPS: add detect_memory_region() 2013-05-08 01:19:11 +02:00
branch.h MIPS: MIPS16e: Support handling of delay slots. 2013-05-09 17:55:20 +02:00
break.h MIPS: Quit exporting kernel internel break codes to uapi/asm/break.h 2013-02-20 18:24:24 +01:00
bug.h
…
bugs.h
…
cache.h MIPS: Rename .data..mostly and properly handle it in linker script 2011-05-10 18:15:24 +01:00
cacheflush.h MIPS: cache: Provide cache flush operations for XFS 2011-10-20 15:00:18 +01:00
cacheops.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cevt-r4k.h MIPS: MSP: Fix build error 2011-05-10 18:15:24 +01:00
checksum.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
clkdev.h MIPS: add clkdev.h 2012-05-15 17:49:20 +02:00
clock.h MIPS: clock.h: Remove declaration of cpu_wait. 2013-05-22 01:34:25 +02:00
cmp.h
…
cmpxchg.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
compat-signal.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
compat.h Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-03-02 07:44:16 -08:00
compiler.h
…
cop2.h MIPS: Netlogic: COP2 save/restore code 2013-06-13 17:46:41 +02:00
cpu-features.h MIPS: oprofile: Fix BUG due to smp_processor_id() in preemptible code. 2013-08-05 13:34:22 +02:00
cpu-info.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cpu.h MIPS: Netlogic: Add support for XLP2XX 2013-09-03 23:22:19 +02:00
debug.h
…
delay.h MIPS: Make __{,n,u}delay declarations match definitions and generic delay.h 2012-10-16 22:20:03 +02:00
device.h
…
div64.h
…
dma-coherence.h MIPS: Add option to disable software I/O coherency. 2013-05-01 16:32:49 -05:00
dma-mapping.h MIPS: Add option to disable software I/O coherency. 2013-05-01 16:32:49 -05:00
dma.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
ds1287.h
…
dsp.h MIPS: DSP: Fix DSP mask for registers. 2013-01-24 13:20:09 +01:00
edac.h
…
elf.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
errno.h UAPI: (Scripted) Disintegrate arch/mips/include/asm 2012-10-09 09:47:14 +01:00
exec.h Disintegrate asm/system.h for MIPS 2012-03-28 18:30:02 +01:00
fb.h
…
fixmap.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
floppy.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
fpregdef.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
fpu.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
fpu_emulator.h MIPS: microMIPS: Floating point support. 2013-05-09 17:55:18 +02:00
ftrace.h
…
futex.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
gcmpregs.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
gic.h MIPS: Fix typos and cleanup comment 2013-07-01 15:10:57 +02:00
gio_device.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
gpio.h
…
gt64120.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
hardirq.h
…
hazards.h MIPS: Get rid of the use of .macro in C code. 2013-04-11 15:39:51 +02:00
highmem.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
hugetlb.h mm/hugetlb: add more arch-defined huge_pte functions 2013-04-29 15:54:33 -07:00
hw_irq.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
i8259.h
…
ide.h
…
idle.h MIPS: Idle: Break r4k_wait into two functions and fix it. 2013-05-22 01:34:28 +02:00
inst.h MIPS: MIPS16e: Support handling of delay slots. 2013-05-09 17:55:20 +02:00
io.h MIPS: define write{b,w,l,q}_relaxed 2013-07-01 15:10:59 +02:00
irq.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
irq_cpu.h MIPS: add irqdomain support for the CPU IRQ controller 2013-02-17 01:25:34 +01:00
irq_gt641xx.h
…
irq_regs.h
…
irqflags.h MIPS: Get rid of the use of .macro in C code. 2013-04-11 15:39:51 +02:00
isadep.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
jazz.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
jazzdma.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
jump_label.h static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]() 2012-02-24 10:05:59 +01:00
kdebug.h
…
kexec.h MIPS: kdump: Add support 2012-12-13 16:46:47 +01:00
kgdb.h
…
kmap_types.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
kprobes.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
kvm_host.h mips/kvm: Fix ABI by moving manipulation of CP0 registers to KVM_{G,S}ET_ONE_REG 2013-06-03 10:58:54 +03:00
linkage.h consolidate cond_syscall and SYSCALL_ALIAS declarations 2013-03-03 22:55:19 -05:00
local.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
m48t37.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mc146818-time.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mc146818rtc.h
…
mips_machine.h MIPS: move mips_{set,get}_machine_name() to a more generic place 2013-05-08 01:19:07 +02:00
mips_mt.h
…
mipsmtregs.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mipsprom.h MIPS: SNI: Fix conflicting wrapper symbols for headers. 2011-10-20 15:00:18 +01:00
mipsregs.h MIPS: microMIPS: Fix improper definition of ISA exception bit. 2013-07-01 15:10:58 +02:00
mmu.h
…
mmu_context.h Merge branch '3.10-fixes' into mips-for-linux-next 2013-07-12 18:11:43 +02:00
mmzone.h
…
module.h MIPS: PMC-Sierra Yosemite: Remove support. 2012-12-13 18:15:30 +01:00
msc01_ic.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
nile4.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
paccess.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
page.h Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET" 2013-07-01 15:10:58 +02:00
pci.h PCI: use weak functions for MSI arch-specific functions 2013-08-12 15:26:39 +00:00
perf_event.h
…
pgalloc.h
…
pgtable-32.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
pgtable-64.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
pgtable-bits.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
pgtable.h consolidate io_remap_pfn_range definitions 2013-06-29 12:46:35 +04:00
pmon.h
…
prefetch.h
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processor.h MIPS: Cleanup indentation and whitespace 2013-07-01 15:10:57 +02:00
prom.h MIPS: move mips_{set,get}_machine_name() to a more generic place 2013-05-08 01:19:07 +02:00
ptrace.h MIPS: Quit exposing Kconfig symbols in uapi headers. 2013-05-23 10:19:04 +02:00
r4k-timer.h MIPS: Synchronize MIPS count one CPU at a time 2012-08-17 10:57:28 +02:00
r4kcache.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
reboot.h
…
reg.h
…
regdef.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
rm9k-ocd.h
…
rtlx.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
seccomp.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
setup.h UAPI: (Scripted) Disintegrate arch/mips/include/asm 2012-10-09 09:47:14 +01:00
sgialib.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sgiarcs.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
shmparam.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sigcontext.h UAPI: (Scripted) Disintegrate arch/mips/include/asm 2012-10-09 09:47:14 +01:00
siginfo.h UAPI: (Scripted) Disintegrate arch/mips/include/asm 2012-10-09 09:47:14 +01:00
signal.h Fix breakage in MIPS siginfo handling 2013-03-19 19:15:52 +01:00
sim.h mips: switch to generic sys_fork() and sys_clone() 2013-02-03 18:33:02 -05:00
smp-ops.h MIPS: ARC: Fix build of firmware library on uniprocessor. 2011-07-20 23:12:11 +01:00
smp.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
smtc.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
smtc_ipi.h
…
smtc_proc.h
…
sni.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
socket.h UAPI: (Scripted) Disintegrate arch/mips/include/asm 2012-10-09 09:47:14 +01:00
sparsemem.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
spinlock.h MIPS: Remove redundant instructions from arch_spin_{,try}lock. 2013-04-26 17:18:24 +02:00
spinlock_types.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
spram.h
…
stackframe.h MIPS: Don't save/restore OCTEON wide multiplier state on syscalls. 2013-07-01 15:10:56 +02:00
stackprotector.h MIPS: initial stack protector support 2013-07-01 15:10:48 +02:00
stacktrace.h MIPS: Add new unwind_stack variant 2011-06-15 14:35:33 +02:00
string.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
suspend.h PM / Hibernate: Remove arch_prepare_suspend() 2011-05-24 23:35:55 +02:00
switch_to.h MIPS: Move cop2 save/restore to switch_to() 2013-06-13 17:46:41 +02:00
termios.h UAPI: (Scripted) Disintegrate arch/mips/include/asm 2012-10-09 09:47:14 +01:00
thread_info.h MIPS: Implement HAVE_CONTEXT_TRACKING. 2013-06-10 18:02:30 +02:00
time.h MIPS: Add new GIC clockevent driver. 2013-05-09 17:55:21 +02:00
timex.h
…
tlb.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
tlbdebug.h
…
tlbflush.h
…
tlbmisc.h MIPS: Fix Jazz 64-bit build error. 2011-12-07 22:01:45 +00:00
topology.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
traps.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
txx9irq.h
…
txx9pio.h
…
txx9tmr.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
types.h UAPI: (Scripted) Disintegrate arch/mips/include/asm 2012-10-09 09:47:14 +01:00
uaccess.h Merge branch 'mti-next' of git://git.linux-mips.org/pub/scm/sjhill/linux-sjhill into mips-for-linux-next 2013-05-09 17:57:30 +02:00
uasm.h MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
unaligned.h
…
unistd.h consolidate cond_syscall and SYSCALL_ALIAS declarations 2013-03-03 22:55:19 -05:00
user.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
vdso.h
…
vga.h
…
vpe.h
…
war.h MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
watch.h
…
wbflush.h
…