Re: [PATCH v10 1/8] PCI: Add pcie_reset_flr to follow calling convention of other reset methods

[Bjorn Helgaas]

On Wed, Jul 28, 2021 at 04:58:14PM -0500, Shanker R Donthineni wrote:
> On 7/28/21 3:23 PM, Bjorn Helgaas wrote:
> > On Wed, Jul 28, 2021 at 01:54:16PM -0500, Shanker R Donthineni wrote:
> >> On 7/27/21 5:12 PM, Bjorn Helgaas wrote:
> >>> On Fri, Jul 09, 2021 at 06:08:06PM +0530, Amey Narkhede wrote:
> >>>> Add has_pcie_flr bitfield in struct pci_dev to indicate support for PCIe
> >>>> FLR to avoid reading PCI_EXP_DEVCAP multiple times.

> >> -       pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &cap);
> >> -       return cap & PCI_EXP_DEVCAP_FLR;
> >> +       return !!FIELD_GET(PCI_EXP_DEVCAP_FLR, dev->devcap);
> >
> > Nice, thanks for reminding me of FIELD_GET().  I like how that works
> > without having to #define *_SHIFT values.  I personally don't care for
> > "!!" and would probably write something like:
> >
> >   return FIELD_GET(PCI_EXP_DEVCAP_FLR, dev->devcap) == 1;
> 
> Both are same since FLR is a single bit value.

Right; this is a style preference, not a correctness question.