e47ecd4e48
The AMD SB600 southbridge has an PATA IDE interface, but the
secondary port has no physical connections, so is disabled in
the PCI header which makes it appear as a legacy port.
On most systems this causes no trouble, but the Amigaone X1000 has
an SB600 connected to a PowerPC SoC PCI-e root port, with an
emulated ISA bus. On this system a kernel panic occurs at boot
time during device attach for the secondary port.
Mark the port as 'dummy' to prevent this. As a bonus, disabling
this will slightly speed up booting on PC systems using an
SB600 as they will now skip 2 known empty ports.
Signed-off-by: Darren Stevens <Darren@stevens-zone.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.