Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=09d7328e62e3b4cefe4bf3eeeeacb54f62a7ae5c Commit: 09d7328e62e3b4cefe4bf3eeeeacb54f62a7ae5c Parent: ef774c16a744f130f27c654bf9c4806e767fc773 Author: Stefan Richter <[EMAIL PROTECTED]> AuthorDate: Mon Feb 18 21:38:35 2008 +0100 Committer: Stefan Richter <[EMAIL PROTECTED]> CommitDate: Tue Feb 19 19:57:24 2008 +0100
Documentation: correction to debugging-via-ohci1394 Rectify a factoid about firewire-ohci. Acked-by: Ingo Molnar <[EMAIL PROTECTED]> Also fix a typo spotted by Bernhard Kaindl. Signed-off-by: Stefan Richter <[EMAIL PROTECTED]> --- Documentation/debugging-via-ohci1394.txt | 17 +++++++++-------- 1 files changed, 9 insertions(+), 8 deletions(-) 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: - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html