Re: [PATCH v4 4/8] PCI: replace pci_dev::driver usage that gets the driver name

Uwe Kleine-König
2021-09-28T10:32:24Z

[-- Attachment #1: Type: text/plain, Size: 1983 bytes --]

On Tue, Sep 28, 2021 at 12:01:28PM +0200, Simon Horman wrote:
> On Mon, Sep 27, 2021 at 10:43:22PM +0200, Uwe Kleine-König wrote:
> > From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> >
> > struct pci_dev::driver holds (apart from a constant offset) the same
> > data as struct pci_dev::dev->driver. With the goal to remove struct
> > pci_dev::driver to get rid of data duplication replace getting the
> > driver name by dev_driver_string() which implicitly makes use of struct
> > pci_dev::dev->driver.
> >
> > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
>
> ...
>
> > diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
> > index 0685ece1f155..23dfb599c828 100644
> > --- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
> > +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
> > @@ -202,7 +202,7 @@ nfp_get_drvinfo(struct nfp_app *app, struct pci_dev *pdev,
> > {
> > char nsp_version[ETHTOOL_FWVERS_LEN] = {};
> >
> > - strlcpy(drvinfo->driver, pdev->driver->name, sizeof(drvinfo->driver));
> > + strlcpy(drvinfo->driver, dev_driver_string(&pdev->dev), sizeof(drvinfo->driver));
>
> I'd slightly prefer to maintain lines under 80 columns wide.
> But not nearly strongly enough to engage in a long debate about it.

:-)

Looking at the output of

git grep strlcpy.\*sizeof

I wonder if it would be sensible to introduce something like

#define strlcpy_array(arr, src) (strlcpy(arr, src, sizeof(arr)) + __must_be_array(arr))

but not sure this is possible without a long debate either (and this
line is over 80 chars wide, too :-).

> In any case, for the NFP portion of this patch.
>
> Acked-by: Simon Horman <simon.horman@corigine.com>

Thanks
Uwe

--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]