From: William McVicker <willmcvicker@google.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: "Jingoo Han" <jingoohan1@gmail.com>,
"Gustavo Pimentel" <gustavo.pimentel@synopsys.com>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
kernel-team@android.com, "Vidya Sagar" <vidyas@nvidia.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 1/2] PCI: dwc: drop dependency on ZONE_DMA32
Date: Thu, 11 Aug 2022 16:38:31 +0000 [thread overview]
Message-ID: <YvUwh1mFpB2WEWdw@google.com> (raw)
In-Reply-To: <YvTJzTpsWlEizEX3@infradead.org>
On 08/11/2022, Christoph Hellwig wrote:
> On Tue, Aug 09, 2022 at 06:00:49PM +0000, Will McVicker wrote:
> > Re-work the msi_msg DMA allocation logic to use dma_alloc_coherent()
> > which uses the coherent DMA mask to try and return an allocation within
> > the DMA mask limits. This allows kernel configurations that disable
> > ZONE_DMA32 to continue supporting a 32-bit DMA mask. Without this patch,
> > the PCIe host device will fail to probe when ZONE_DMA32 is disabled.
>
> > + dma_free_coherent(dev, PAGE_SIZE, pp->msi_page, pp->msi_data);
>
> Isn't msi_page a struct page * which should become a void * now?
>
> Otherwise this looks good and is what the driver should have done
> from the very beginning.
I've updated this in v3 to use dmam_alloc_coherent() and dropped msi_page
since it's not actually used. So this block is dropped now. Thanks for
taking a look though!
--Will
next prev parent reply other threads:[~2022-08-11 17:07 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-09 18:00 [PATCH v1 0/2] PCI: dwc: Add support for 64-bit MSI target addresses Will McVicker
2022-08-09 18:00 ` [PATCH v1 1/2] PCI: dwc: drop dependency on ZONE_DMA32 Will McVicker
2022-08-11 9:20 ` Christoph Hellwig
2022-08-11 16:38 ` William McVicker [this message]
2022-08-09 18:00 ` [PATCH v1 2/2] PCI: dwc: add support for 64-bit MSI target address Will McVicker
2022-08-10 17:18 ` kernel test robot
2022-08-11 9:22 ` Christoph Hellwig
2022-08-11 16:36 ` William McVicker
2022-08-11 12:32 ` kernel test robot
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