Re: [PATCH V5 2/5] PCI/TPH: Add Steering Tag support
From: Simon Horman
Date: Tue Sep 17 2024 - 12:14:28 EST
On Tue, Sep 17, 2024 at 09:31:00AM -0500, Wei Huang wrote:
>
>
> On 9/17/24 02:32, Simon Horman wrote:
> > On Mon, Sep 16, 2024 at 03:51:00PM -0500, Wei Huang wrote:
> ...
> >> + val = readl(vec_ctrl);
> >> + mask = PCI_MSIX_ENTRY_CTRL_ST_LOWER | PCI_MSIX_ENTRY_CTRL_ST_UPPER;
> >> + val &= ~mask;
> >> + val |= FIELD_PREP(mask, (u32)tag);
> >
> > Hi Wei Huang,
> >
> > Unfortunately clang-18 (x86_64, allmodconfig, W=1, when applied to net-next)
> > complains about this. I think it is because it expects FIELD_PREP to be
> > used with a mask that is a built-in constant.
>
> I thought I fixed it, but apparently not enough for clang-18. I will
> address this problem, along with other comments from you and Bjorn (if any).
>
> BTW there is another code in drivers/gpu/drm/ using a similar approach.
Thanks,
I will run some checks over drivers/gpu/drm/ and let you know if they find
anything.