Hector Martin 83335517aa firewire-ohci: work around oversized DMA reads on JMicron controllers ... [ Upstream commit 188775181b ] At least some JMicron controllers issue buggy oversized DMA reads when fetching context descriptors, always fetching 0x20 bytes at once for descriptors which are only 0x10 bytes long. This is often harmless, but can cause page faults on modern systems with IOMMUs: DMAR: [DMA Read] Request device [05:00.0] fault addr fff56000 [fault reason 06] PTE Read access is not set firewire_ohci 0000:05:00.0: DMA context IT0 has stopped, error code: evt_descriptor_read This works around the problem by always leaving 0x10 padding bytes at the end of descriptor buffer pages, which should be harmless to do unconditionally for controllers in case others have the same behavior. Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-05-30 07:50:18 +02:00
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core-card.c	IEEE 1394 (FireWire) subsystem updates post v3.4:	2012-05-24 12:57:47 -07:00
core-cdev.c	firewire: use in_compat_syscall to check ioctl compatness	2016-03-22 15:36:02 -07:00
core-device.c	firewire: core: document fw_csr_string's truncation of long strings	2014-12-10 20:53:02 +01:00
core-iso.c	firewire: core: fix multichannel IR with buffers larger than 2 GB	2012-06-17 19:35:26 +02:00
core-topology.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
core-transaction.c	firewire: core: use correct vendor/model IDs	2015-02-02 21:56:03 +01:00
core.h	sound updates for 3.16-rc1	2014-06-04 09:08:25 -07:00
init_ohci1394_dma.c	various: Fix spelling of "asynchronous" in comments.	2012-11-19 14:32:13 +01:00
Kconfig	firewire: IEEE 1394 (FireWire) support should depend on HAS_DMA	2014-07-13 20:53:25 +02:00
Makefile	ieee1394: move init_ohci1394_dma to drivers/firewire/	2010-10-11 14:48:03 +02:00
net.c	firewire: net: fix fragmented datagram_size off-by-one	2016-11-03 14:46:39 +01:00
nosy-user.h	firewire: nosy: endianess fixes and annotations	2010-07-27 11:04:11 +02:00
nosy.c	firewire: nosy: do not ignore errors in ioremap_nocache()	2016-10-09 11:38:11 +02:00
nosy.h	firewire: nosy: misc cleanups	2010-07-27 11:04:10 +02:00
ohci.c	firewire-ohci: work around oversized DMA reads on JMicron controllers	2018-05-30 07:50:18 +02:00
ohci.h	firewire: ohci: fix TI TSB82AA2 regression since 2.6.35	2010-10-17 14:09:12 +02:00
sbp2.c	scsi: Do not set cmd_per_lun to 1 in the host template	2015-05-31 18:06:28 -07:00