Re: [PATCH v1] drivers/msi.c : use devm_ioremap replace ioremap

From: Leon Romanovsky <leon@kernel.org>
To: Marc Zyngier <maz@kernel.org>
Cc: Lizhe <sensor1010@163.com>,
	bhelgaas@google.com, tglx@linutronix.de, darwi@linutronix.de,
	jgg@ziepe.ca, linux-pci@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1] drivers/msi.c : use devm_ioremap replace ioremap
Date: Sun, 22 Jan 2023 14:52:08 +0200	[thread overview]
Message-ID: <Y80xeG+eEdVLn003@unreal> (raw)
In-Reply-To: <86h6win8w6.wl-maz@kernel.org>

On Sun, Jan 22, 2023 at 10:47:21AM +0000, Marc Zyngier wrote:
> On Sat, 21 Jan 2023 17:04:20 +0000,
> Lizhe <sensor1010@163.com> wrote:
> > 
> > use devm_ioremap replace ioremap
> > 
> > Signed-off-by: Lizhe <sensor1010@163.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.