linux-kernel - Re: [PATCH v1] drivers/msi.c : use devm

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Message-ID: <Y80xeG+eEdVLn003@unreal>
Date:   Sun, 22 Jan 2023 14:52:08 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Marc Zyngier <maz@...nel.org>
Cc:     Lizhe <sensor1010@....com>, bhelgaas@...gle.com,
        tglx@...utronix.de, darwi@...utronix.de, jgg@...pe.ca,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] drivers/msi.c : use devm_ioremap replace ioremap

On Sun, Jan 22, 2023 at 10:47:21AM +0000, Marc Zyngier wrote:
> On Sat, 21 Jan 2023 17:04:20 +0000,
> Lizhe <sensor1010@....com> wrote:
> > 
> > use devm_ioremap replace ioremap
> > 
> > Signed-off-by: Lizhe <sensor1010@....com>
> > ---
> >  drivers/pci/msi/msi.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
> > index 1f716624ca56..184eca85b88b 100644
> > --- a/drivers/pci/msi/msi.c
> > +++ b/drivers/pci/msi/msi.c
> > @@ -566,7 +566,7 @@ static void __iomem *msix_map_region(struct pci_dev *dev,
> >  	table_offset &= PCI_MSIX_TABLE_OFFSET;
> >  	phys_addr = pci_resource_start(dev, bir) + table_offset;
> >  
> > -	return ioremap(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
> > +	return devm_ioremap(&dev->dev, phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
> >  }
> 
> And where is the unmap dealt with? From what I can see, this will
> probably explode when the device is removed...

Right, he/she sends many random patches like this.
https://lore.kernel.org/all/Y8Pt+IdfWBVy8nIA@unreal/

Thanks

> 
> 	 M.
> 
> -- 
> Without deviation from the norm, progress is not possible.