From: Christoph Hellwig <hch@infradead.org>
To: James Sewart <jamessewart@arista.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
Dmitry Safonov <dima@arista.com>,
linux-pci@vger.kernel.org, Dmitry Safonov <0x7f454c46@gmail.com>,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
Bjorn Helgaas <helgaas@kernel.org>,
Logan Gunthorpe <logang@deltatee.com>
Subject: Re: [PATCH v5 1/3] PCI: Fix off by one in dma_alias_mask allocation size
Date: Mon, 2 Dec 2019 09:03:04 -0800 [thread overview]
Message-ID: <20191202170304.GA4174@infradead.org> (raw)
In-Reply-To: <9DD82D05-6B9E-4AF5-9A3C-D459B75C0089@arista.com>
On Fri, Nov 29, 2019 at 05:56:19PM +0000, James Sewart wrote:
> The number of possible devfns is 256 so the size of the bitmap for
> allocations should be U8_MAX+1.
>
> Signed-off-by: James Sewart <jamessewart@arista.com>
> ---
> drivers/pci/pci.c | 2 +-
> drivers/pci/search.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> index a97e2571a527..0a4449a30ace 100644
> --- a/drivers/pci/pci.c
> +++ b/drivers/pci/pci.c
> @@ -5876,7 +5876,7 @@ int pci_set_vga_state(struct pci_dev *dev, bool decode,
> void pci_add_dma_alias(struct pci_dev *dev, u8 devfn)
> {
> if (!dev->dma_alias_mask)
> - dev->dma_alias_mask = bitmap_zalloc(U8_MAX, GFP_KERNEL);
> + dev->dma_alias_mask = bitmap_zalloc(U8_MAX+1, GFP_KERNEL);
Missing whitespaces around the "+".
> - for_each_set_bit(devfn, pdev->dma_alias_mask, U8_MAX) {
> + for_each_set_bit(devfn, pdev->dma_alias_mask, U8_MAX+1) {
Same here.
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prev parent reply other threads:[~2019-12-02 17:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 12:52 [PATCH] Ensure pci transactions coming from PLX NTB are handled when IOMMU is turned on James Sewart via iommu
2019-11-05 12:17 ` James Sewart via iommu
2019-11-20 17:48 ` Dmitry Safonov
2019-11-20 19:30 ` Logan Gunthorpe
2019-11-20 19:49 ` Bjorn Helgaas
2019-11-20 19:32 ` Bjorn Helgaas
2019-11-26 17:03 ` [PATCH v2] PCI: Add DMA alias quirk for PLX PEX NTB James Sewart via iommu
2019-11-26 17:06 ` Logan Gunthorpe
2019-11-26 17:36 ` [PATCH v3 1/2] PCI: Add helper pci_add_dma_alias_range James Sewart via iommu
2019-11-26 17:37 ` [PATCH v3 2/2] PCI: Add DMA alias quirk for PLX PEX NTB James Sewart via iommu
2019-11-26 17:38 ` [PATCH v2] " Christoph Hellwig
2019-11-27 13:27 ` [PATCH v3 1/2] PCI: Add parameter nr_devfns to pci_add_dma_alias James Sewart via iommu
2019-11-27 13:28 ` [PATCH v3 2/2] PCI: Add DMA alias quirk for PLX PEX NTB James Sewart via iommu
2019-11-27 17:38 ` [PATCH v3 1/2] PCI: Add parameter nr_devfns to pci_add_dma_alias Logan Gunthorpe
2019-11-29 12:49 ` [PATCH v4 " James Sewart via iommu
2019-11-29 12:49 ` [PATCH v4 2/2] PCI: Add DMA alias quirk for PLX PEX NTB James Sewart via iommu
2019-11-29 16:50 ` [PATCH v4 1/2] PCI: Add parameter nr_devfns to pci_add_dma_alias Logan Gunthorpe
2019-11-29 17:19 ` James Sewart via iommu
2019-11-29 17:26 ` Logan Gunthorpe
2019-11-29 17:56 ` [PATCH v5 1/3] PCI: Fix off by one in dma_alias_mask allocation size James Sewart via iommu
2019-11-29 17:56 ` [PATCH v5 2/3] PCI: Add parameter nr_devfns to pci_add_dma_alias James Sewart via iommu
2019-11-29 17:57 ` [PATCH v5 3/3] PCI: Add DMA alias quirk for PLX PEX NTB James Sewart via iommu
2019-12-02 17:03 ` [PATCH v5 2/3] PCI: Add parameter nr_devfns to pci_add_dma_alias Christoph Hellwig
2019-11-29 17:58 ` [PATCH v5 1/3] PCI: Fix off by one in dma_alias_mask allocation size Logan Gunthorpe
2019-12-02 17:03 ` Christoph Hellwig [this message]
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