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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-26 07:48:27 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-26 07:48:27 -0800
commit98c1fc934c097d84dc30c639e9bdb0b992ef53e2 (patch)
tree69150e7ca6b4a0eb842d5135164ee1d40a4dabbe /Documentation
parent7c811e4b6af424c295e3c6438fdc9b647fe6595f (diff)
parentfae603121428ba83b7343c88e68a7144525ab3eb (diff)
downloadlinux-98c1fc934c097d84dc30c639e9bdb0b992ef53e2.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: fix NULL pointer deref. and resource leak Documentation: correction to debugging-via-ohci1394 ieee1394: sbp2: fix rescan-scsi-bus firewire: fw-sbp2: fix NULL pointer deref. in scsi_remove_device firewire: fw-sbp2: fix NULL pointer deref. in slave_alloc firewire: fw-sbp2: (try to) avoid I/O errors during reconnect firewire: fw-sbp2: enforce a retry of __scsi_add_device if bus generation changed firewire: fw-sbp2: sort includes firewire: fw-sbp2: logout and login after failed reconnect firewire: fw-sbp2: don't add scsi_device twice firewire: fw-sbp2: log bus_id at management request failures firewire: fw-sbp2: wait for completion of fetch agent reset ieee1394: sbp2: add INQUIRY delay workaround firewire: fw-sbp2: add INQUIRY delay workaround firewire: log GUID of new devices firewire: fw-sbp2: don't retry login or reconnect after unplug firewire: fix "kobject_add failed for fw* with -EEXIST" firewire: fw-sbp2: fix logout before login retry firewire: fw-sbp2: unsigned int vs. unsigned
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/debugging-via-ohci1394.txt17
1 files changed, 9 insertions, 8 deletions
diff --git a/Documentation/debugging-via-ohci1394.txt b/Documentation/debugging-via-ohci1394.txt
index de4804e8b39..c360d4e91b4 100644
--- a/Documentation/debugging-via-ohci1394.txt
+++ b/Documentation/debugging-via-ohci1394.txt
@@ -36,14 +36,15 @@ available (notebooks) or too slow for extensive debug information (like ACPI).
Drivers
-------
-The OHCI-1394 drivers in drivers/firewire and drivers/ieee1394 initialize
-the OHCI-1394 controllers to a working state and can be used to enable
-physical DMA. By default you only have to load the driver, and physical
-DMA access will be granted to all remote nodes, but it can be turned off
-when using the ohci1394 driver.
-
-Because these drivers depend on the PCI enumeration to be completed, an
-initialization routine which can runs pretty early (long before console_init(),
+The ohci1394 driver in drivers/ieee1394 initializes the OHCI-1394 controllers
+to a working state and enables physical DMA by default for all remote nodes.
+This can be turned off by ohci1394's module parameter phys_dma=0.
+
+The alternative firewire-ohci driver in drivers/firewire uses filtered physical
+DMA, hence is not yet suitable for remote debugging.
+
+Because ohci1394 depends on the PCI enumeration to be completed, an
+initialization routine which runs pretty early (long before console_init()
which makes the printk buffer appear on the console can be called) was written.
To activate it, enable CONFIG_PROVIDE_OHCI1394_DMA_INIT (Kernel hacking menu: