X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fieee1394%2FKconfig;h=2769e505f051530cb676cf60df41b59a34161ceb;hb=b809289df06ff9453c1b19df74ea83aba311dfc6;hp=39142e2f804b2433010f512492df8c5e2aa2f116;hpb=e7de369050534025b33aab1033358bf47a577e4d;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/ieee1394/Kconfig b/drivers/ieee1394/Kconfig
index 39142e2f804b..2769e505f051 100644
--- a/drivers/ieee1394/Kconfig
+++ b/drivers/ieee1394/Kconfig
@@ -120,16 +120,32 @@ config IEEE1394_VIDEO1394
 	  this option only if you have an IEEE 1394 video device connected to
 	  an OHCI-1394 card.
 
+comment "SBP-2 support (for storage devices) requires SCSI"
+	depends on IEEE1394 && SCSI=n
+
 config IEEE1394_SBP2
 	tristate "SBP-2 support (Harddisks etc.)"
 	depends on IEEE1394 && SCSI && (PCI || BROKEN)
 	help
-	  This option enables you to use SBP-2 devices connected to your IEEE
-	  1394 bus.  SBP-2 devices include harddrives and DVD devices.
+	  This option enables you to use SBP-2 devices connected to an IEEE
+	  1394 bus.  SBP-2 devices include storage devices like harddisks and
+	  DVD drives, also some other FireWire devices like scanners.
+
+	  You should also enable support for disks, CD-ROMs, etc. in the SCSI
+	  configuration section.
 
 config IEEE1394_SBP2_PHYS_DMA
-	bool "Enable Phys DMA support for SBP2 (Debug)"
-	depends on IEEE1394 && IEEE1394_SBP2
+	bool "Enable replacement for physical DMA in SBP2"
+	depends on IEEE1394 && IEEE1394_SBP2 && EXPERIMENTAL && (X86_32 || PPC_32)
+	help
+	  This builds sbp2 for use with non-OHCI host adapters which do not
+	  support physical DMA or for when ohci1394 is run with phys_dma=0.
+	  Physical DMA is data movement without assistence of the drivers'
+	  interrupt handlers.  This option includes the interrupt handlers
+	  that are required in absence of this hardware feature.
+
+	  This option is buggy and currently broken on some architectures.
+	  If unsure, say N.
 
 config IEEE1394_ETH1394
 	tristate "Ethernet over 1394"