Commit 278ecfb8 authored by Tejun Heo's avatar Tejun Heo Committed by Bartlomiej Zolnierkiewicz

ide: note that IDE generic may prevent other drivers from attaching

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: default avatarTejun 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: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 801bd32e
...@@ -292,6 +292,20 @@ config IDE_GENERIC ...@@ -292,6 +292,20 @@ config IDE_GENERIC
tristate "generic/default IDE chipset support" tristate "generic/default IDE chipset support"
depends on ALPHA || X86 || IA64 || M32R || MIPS depends on ALPHA || X86 || IA64 || M32R || MIPS
help 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. If unsure, say N.
config BLK_DEV_PLATFORM config BLK_DEV_PLATFORM
......
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