ide: note that IDE generic may prevent other drivers from attaching (278ecfb8) · Commits · 戴 / test

Enabling IDE generic may prevent ATA controllers located on legacy ports from being attached to more proper driver or can prevent other controllers which share the IRQ from working. Note it in the help message. Signed-off-by:

Tejun Heo <tj@kernel.org> Cc: xerces8 <xerces8@butn.net> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: stein@hermes.si [bart: s/will grab/may grab/ since Borislav has fixed PCI-case for .28] Signed-off-by:

Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/Kconfig

+14 −0

Original line number	Diff line number	Diff line
		@@ -292,6 +292,20 @@ config IDE_GENERIC
		tristate "generic/default IDE chipset support"
		depends on ALPHA \|\| X86 \|\| IA64 \|\| M32R \|\| MIPS
		help
		This is the generic IDE driver. This driver attaches to the
		fixed legacy ports (e.g. on PCs 0x1f0/0x170, 0x1e8/0x168 and
		so on). Please note that if this driver is built into the
		kernel or loaded before other ATA (IDE or libata) drivers
		and the controller is located at legacy ports, this driver
		may grab those ports and thus can prevent the controller
		specific driver from attaching.

		Also, currently, IDE generic doesn't allow IRQ sharing
		meaning that the IRQs it grabs won't be available to other
		controllers sharing those IRQs which usually makes drivers
		for those controllers fail. Generally, it's not a good idea
		to load IDE generic driver on modern systems.

		If unsure, say N.

		config BLK_DEV_PLATFORM

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