On Thu, 2021-04-15 at 16:27 -0700, Ben Widawsky wrote:
> Vendor capabilities occupy 0x8000 to 0xFFFF according to CXL 2.0 spec
> 8.2.8.2.1 CXL Device Capabilities. While they are not defined by the
> spec, they are allowed and not "unknown". Call this detail out in the
> logs to let users easily distinguish the difference.
>
> v2: Should be greater than or equal to (Ben)
If there's a v3, drop this to below the '---'. Otherwise note for Dan to
drop when applying I guess :)
>
> Fixes: 8adaf747c9f0b ("cxl/mem: Find device capabilities")
> Signed-off-by: Ben Widawsky <[email protected]>
> ---
> drivers/cxl/mem.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
> index c05617b0ba4b..28c7c29567b3 100644
> --- a/drivers/cxl/mem.c
> +++ b/drivers/cxl/mem.c
> @@ -939,7 +939,10 @@ static int cxl_mem_setup_regs(struct cxl_mem *cxlm)
> cxlm->memdev_regs = register_block;
> break;
> default:
> - dev_dbg(dev, "Unknown cap ID: %x (0x%x)\n", cap_id,
> offset);
> + if (cap_id >= 0x8000)
> + dev_dbg(dev, "Vendor cap ID: %x (0x%x)\n",
> cap_id, offset);
> + else
> + dev_dbg(dev, "Unknown cap ID: %x (0x%x)\n",
> cap_id, offset);
> break;
> }
> }
