On Fri, Aug 06, 2021 at 12:31:05PM +0100, Will Deacon wrote:

If CONFIG_DMA_RESTRICTED_POOL=n then probing a device with a reference
to a "restricted-dma-pool" will fail with a reasonably cryptic error:

  | pci-host-generic: probe of 10000.pci failed with error -22

Print a more helpful message in this case and try to continue probing
the device as we do if the kernel doesn't have the restricted DMA patches
applied or either CONFIG_OF_ADDRESS or CONFIG_HAS_DMA =n.

Cc: Claire Chang <redacted>
Cc: Konrad Rzeszutek Wilk <redacted>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
---
 drivers/of/address.c    | 8 ++++----
 drivers/of/device.c     | 2 +-
 drivers/of/of_private.h | 8 +++-----
 3 files changed, 8 insertions(+), 10 deletions(-)

Sorry, didn't mean to send this patch a second time, it was still kicking
around in my tree from yesterday and I accidentally picked it up when
sending my TLBI series.

Please ignore.

Will