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[PATCH] bcm43xx: add a note that not all devices support PIO.

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Signed-off-by: Michael Buesch <mbuesch@freenet.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch 2006-02-12 16:52:10 +01:00 committed by John W. Linville
parent 77db31ea43
commit 8bcab3f559
1 changed files with 5 additions and 0 deletions
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5
drivers/net/wireless/bcm43xx/Kconfig
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@ -52,6 +52,11 @@ config BCM43XX_PIO_MODE
Only include Programmed I/O (PIO).
This reduces the size of the driver module, by omitting the DMA code.
Please note that PIO transfers are slow (compared to DMA).
Also note that not all devices of the 43xx series support PIO.
The 4306 (Apple Airport Extreme and others) supports PIO, while
the 4318 is known to _not_ support PIO.
Only use PIO, if DMA does not work for you.
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