Messages in this thread | | | Date | Tue, 17 May 2022 17:46:35 +0100 | Subject | Re: [PATCH] media: hantro: fix compatible string deprecation warning | From | Robin Murphy <> |
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On 2022-05-17 15:35, Martin Kepplinger wrote: > of_device_is_compatible() in the end uses strlen of the string > for comparison, so in this case, the condition is true even if > the requested string "nxp,imx8mq-vpu-g1" is being used. The first > chars containing "nxp,imx8mq-vpu" are the same.
Have you seen this go wrong in practice? AFAICS, unless you're on SPARC, which seems somewhat unlikely for an i.MX8 peripheral, of_compat_cmp() should map to strcasecmp(), which should do the right thing :/
Robin.
> Fix this by encoding what the comment says. > > Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm> > --- > > This is more of a bugreport as the solution doesn't look very elegant > to me. I'm happy for advice. > > thanks, > martin > > > drivers/staging/media/hantro/hantro_drv.c | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) > > diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c > index ac232b5f7825..014fab637df0 100644 > --- a/drivers/staging/media/hantro/hantro_drv.c > +++ b/drivers/staging/media/hantro/hantro_drv.c > @@ -923,10 +923,11 @@ static int hantro_probe(struct platform_device *pdev) > > /* > * Support for nxp,imx8mq-vpu is kept for backwards compatibility > - * but it's deprecated. Please update your DTS file to use > - * nxp,imx8mq-vpu-g1 or nxp,imx8mq-vpu-g2 instead. > + * but it's deprecated. > */ > - if (of_device_is_compatible(pdev->dev.of_node, "nxp,imx8mq-vpu")) > + if ((of_device_is_compatible(pdev->dev.of_node, "nxp,imx8mq-vpu")) && > + (!of_device_is_compatible(pdev->dev.of_node, "nxp,imx8mq-vpu-g1")) && > + (!of_device_is_compatible(pdev->dev.of_node, "nxp,imx8mq-vpu-g2"))) > dev_warn(&pdev->dev, "%s compatible is deprecated\n", > match->compatible); >
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