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Kernel v2.6.25-rc3-git5 /Documentation/debugging-via-ohci1394.txt

Filename:/Documentation/debugging-via-ohci1394.txt
Lines Added:9
Lines Deleted:8
Also changed in: (Previous) 2.6.25-rc3-git4  2.6.25-rc3-git3  2.6.25-rc3-git2  2.6.25-rc3-git1  2.6.25-rc3  2.6.25-rc2 
(Following) 2.6.25-rc3-git6  2.6.25-rc4  2.6.25-rc5  2.6.25-rc6  2.6.25-rc7  2.6.25-rc8 

Location
[  2.6.25-rc3-git5
  [  Documentation
     o  debugging-via-ohci1394.txt

Patch

diff --git a/Documentation/debugging-via-ohci1394.txt b/Documentation/debugging-via-ohci1394.txt
index de4804e..c360d4e 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:


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