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f011bf085c
I did a quick shot on what I described and the appended patch does the first thing needed for working suspend/resume in ohci1394 which is HW de- and re-initialisation. It works with suspend2disk on my Ricoh R5C552 IEEE 1394 Controller with the 2.6.17 kernel to the extent that if I call dvgrab --interactive after suspend2disk without unloading ohci1394, it does not lock up dvgrab with 100% CPU but properly connects to the camera, given that I first unplug and plug the camera after coming back from suspend. I guess that could be fixed by forcing a bus reset in the resume function. I cannot test suspend to RAM here at the moment and should follow the guidelines in Documentation/power/pci.txt also, so this is rather a quick report than a finished patch and there are some rough edges: However, with this patch, I have to unload at least some in-kernel users of ohci1394 like dv1394 or video1394 before suspending. Not doing that caused an Oops and a bad tasklet error, probably from not handling ISO tasklets during suspend/resume properly. Maybe these can be temporarily cleared or unregistered and re-registered for suspend/resume with help from the other layers or from the highlevel 1394 core, but I do not really know what these do. But this patch provides a useful base to start from and is already of much help for people which do not need dv1394 and video1394 or can unload them at least during suspend. I cannot test function with sbp2 at the moment, but raw1394 seems to work fine. Signed-off-by: Bernhard Kaindl <bk@fsfe.org> Update 1: merge with previous two ohci1394 suspend/resume patches Update 2: version for application on top of Linux 2.6.19-rc4 Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> |
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| .. | ||
| .gitignore | ||
| config_roms.c | ||
| config_roms.h | ||
| csr.c | ||
| csr.h | ||
| csr1212.c | ||
| csr1212.h | ||
| dma.c | ||
| dma.h | ||
| dv1394-private.h | ||
| dv1394.c | ||
| dv1394.h | ||
| eth1394.c | ||
| eth1394.h | ||
| highlevel.c | ||
| highlevel.h | ||
| hosts.c | ||
| hosts.h | ||
| ieee1394_core.c | ||
| ieee1394_core.h | ||
| ieee1394_hotplug.h | ||
| ieee1394_transactions.c | ||
| ieee1394_transactions.h | ||
| ieee1394_types.h | ||
| ieee1394-ioctl.h | ||
| ieee1394.h | ||
| iso.c | ||
| iso.h | ||
| Kconfig | ||
| Makefile | ||
| nodemgr.c | ||
| nodemgr.h | ||
| ohci1394.c | ||
| ohci1394.h | ||
| oui.db | ||
| oui2c.sh | ||
| pcilynx.c | ||
| pcilynx.h | ||
| raw1394-private.h | ||
| raw1394.c | ||
| raw1394.h | ||
| sbp2.c | ||
| sbp2.h | ||
| video1394.c | ||
| video1394.h | ||