1 files changed, 9 insertions, 8 deletions
diff --git a/Documentation/debugging-via-ohci1394.txt b/Documentation/debugging-via-ohci1394.txt
index de4804e8b396..c360d4e91b48 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 ohci1394 driver in drivers/ieee1394 initializes the OHCI-1394 controllers
-the OHCI-1394 controllers to a working state and can be used to enable
+to a working state and enables physical DMA by default for all remote nodes.
-physical DMA. By default you only have to load the driver, and physical
+This can be turned off by ohci1394's module parameter phys_dma=0.
-DMA access will be granted to all remote nodes, but it can be turned off
-when using the ohci1394 driver.
+The alternative firewire-ohci driver in drivers/firewire uses filtered physical
+DMA, hence is not yet suitable for remote debugging.
-Because these drivers depend on the PCI enumeration to be completed, an
-initialization routine which can runs pretty early (long before console_init(),
+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:

diff --git a/Documentation/debugging-via-ohci1394.txt b/Documentation/debugging-via-ohci1394.txt index de4804e8b396..c360d4e91b48 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).
36	Drivers	36	Drivers
37	-------	37	-------
38		38
39	The OHCI-1394 drivers in drivers/firewire and drivers/ieee1394 initialize	39	The ohci1394 driver in drivers/ieee1394 initializes the OHCI-1394 controllers
40	the OHCI-1394 controllers to a working state and can be used to enable	40	to a working state and enables physical DMA by default for all remote nodes.
41	physical DMA. By default you only have to load the driver, and physical	41	This can be turned off by ohci1394's module parameter phys_dma=0.
42	DMA access will be granted to all remote nodes, but it can be turned off	42
43	when using the ohci1394 driver.	43	The alternative firewire-ohci driver in drivers/firewire uses filtered physical
44		44	DMA, hence is not yet suitable for remote debugging.
45	Because these drivers depend on the PCI enumeration to be completed, an	45
46	initialization routine which can runs pretty early (long before console_init(),	46	Because ohci1394 depends on the PCI enumeration to be completed, an
		47	initialization routine which runs pretty early (long before console_init()
47	which makes the printk buffer appear on the console can be called) was written.	48	which makes the printk buffer appear on the console can be called) was written.
48		49
49	To activate it, enable CONFIG_PROVIDE_OHCI1394_DMA_INIT (Kernel hacking menu:	50	To activate it, enable CONFIG_PROVIDE_OHCI1394_DMA_INIT (Kernel hacking menu: