[v2] cxl: abort cxl_pci_enable_device_hook() if PCI channel is offline

[Michael Ellerman]

On Mon, 2015-07-09 at 00:52:58 UTC, Andrew Donnellan wrote:
> cxl_pci_enable_device_hook() is called when attempting to enable an AFU
> sitting on a vPHB. At present, the state of the underlying CXL card's PCI
> channel is only checked when it calls cxl_afu_check_and_enable() at the
> very end, after it has already set DMA options and initialised a default
> context.
> 
> Check the CXL card's link status before setting DMA options or initialising
> a default context. If the link is down, print a warning and return
> immediately.
> 
> Signed-off-by: Andrew Donnellan <andrew.donnellan at au1.ibm.com>
> Acked-by: Ian Munsie <imunsie at au1.ibm.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/7d1647dc4ba0a61fec5381c1

cheers