Maciej W. Rozycki 0fabe1021f MIPS: DECstation I/O ASIC DMA interrupt classes ... This change complements commits d0da7c002f7b2a93582187a9e3f73891a01d8ee4 [MIPS: DEC: Convert to new irq_chip functions] and 5359b938c0 [MIPS: DECstation I/O ASIC DMA interrupt handling fix] and implements automatic handling of the two classes of DMA interrupts the I/O ASIC implements, informational and errors. Informational DMA interrupts do not stop the transfer and use the `handle_edge_irq' handler that clears the request right away so that another request may be recorded while the previous is being handled. DMA error interrupts stop the transfer and require a corrective action before DMA can be reenabled. Therefore they use the `handle_fasteoi_irq' handler that only clears the request on the way out. Because MIPS processor interrupt inputs, one of which the I/O ASIC's interrupt controller is cascaded to, are level-triggered it is recommended that error DMA interrupt action handlers are registered with the IRQF_ONESHOT flag set so that they are run with the interrupt line masked. This change removes the export of clear_ioasic_dma_irq that now does not have to be called by device drivers to clear interrupts explicitly anymore. Originally these interrupts were cleared in the .end handler of the `irq_chip' 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/5874/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		2013-10-29 21:24:42 +01:00
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arc	ARC: Ignore ptrace SETREGSET request for synthetic register "stop_pc"	2013-10-12 12:00:36 +05:30
arm	ARM: SoC fixes for 3.12-rc	2013-10-25 11:49:23 +01:00
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mips	MIPS: DECstation I/O ASIC DMA interrupt classes	2013-10-29 21:24:42 +01:00
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parisc	parisc: Do not crash 64bit SMP kernels on machines with >= 4GB RAM	2013-10-27 15:58:44 +01:00
powerpc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-10-23 07:47:42 +01:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2013-10-23 08:10:25 +01:00
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sparc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-10-23 07:47:42 +01:00
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x86	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-10-23 07:47:42 +01:00
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