Update kernel parameter document for libata DMA mode setting knobs.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index e5b447a..c417877 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -883,6 +883,14 @@
lapic_timer_c2_ok [X86-32,x86-64,APIC] trust the local apic timer in
C2 power state.
+ libata.dma= [LIBATA] DMA control
+ libata.dma=0 Disable all PATA and SATA DMA
+ libata.dma=1 PATA and SATA Disk DMA only
+ libata.dma=2 ATAPI (CDROM) DMA only
+ libata.dma=4 Compact Flash DMA only
+ Combinations also work, so libata.dma=3 enables DMA
+ for disks and CDROMs, but not CFs.
+
libata.noacpi [LIBATA] Disables use of ACPI in libata suspend/resume
when set.
Format: <int>