Re: [PATCH] soundwire: amd: fix an IS_ERR() vs NULL bug

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On Thu, Apr 06, 2023 at 05:32:21PM +0530, Mukunda,Vijendar wrote:
> On 06/04/23 14:26, Dan Carpenter wrote:
> > The devm_ioremap() function returns NULL on error.  It never returns
> > error pointers.  Update the error checking accordingly.
> >
> > Fixes: a673a8dfc214 ("soundwire: amd: Add support for AMD Manager driver")
> > Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
> > ---
> >  drivers/soundwire/amd_manager.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
> > index 9fb7f91ca182..9bb8ae8c5f32 100644
> > --- a/drivers/soundwire/amd_manager.c
> > +++ b/drivers/soundwire/amd_manager.c
> > @@ -910,9 +910,9 @@ static int amd_sdw_manager_probe(struct platform_device *pdev)
> >  		return -ENOMEM;
> >  
> >  	amd_manager->acp_mmio = devm_ioremap(dev, res->start, resource_size(res));
> > -	if (IS_ERR(amd_manager->mmio)) {
> > +	if (!amd_manager->mmio) {
> This will break the functionality.  Condition should be
> if (!amd_manager->acp_mmio)
> 
> >  		dev_err(dev, "mmio not found\n");
> > -		return PTR_ERR(amd_manager->mmio);
> > +		return -ENOMEM;

Ah crap.  You're right.  Thanks.  I will resend.

regards,
dan carpenter




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