From: Bjorn Helgaas <helgaas@kernel.org>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
David Miller <davem@davemloft.net>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Wei Yang <weiyang@linux.vnet.ibm.com>,
Khalid Aziz <khalid.aziz@oracle.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org,
linux-xtensa@linux-xtensa.org
Subject: Re: [PATCH v13 01/16] PCI: Let pci_mmap_page_range() take resource address
Date: Sat, 18 Jun 2016 07:17:52 -0500 [thread overview]
Message-ID: <20160618121752.GA22721@localhost> (raw)
In-Reply-To: <20160618022501.15648-2-yinghai@kernel.org>
On Fri, Jun 17, 2016 at 07:24:46PM -0700, Yinghai Lu wrote:
> In 8c05cd08a7 ("PCI: fix offset check for sysfs mmapped files"), try
> to check exposed value with resource start/end in proc mmap path.
>
> | start = vma->vm_pgoff;
> | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
> | pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
> | pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0;
> | if (start >= pci_start && start < pci_start + size &&
> | start + nr <= pci_start + size)
>
> That breaks sparc that exposed value is BAR value, and need to be offseted
> to resource address.
I asked this same question of the v12 patch, but I don't think you
answered it:
I'm not quite sure what you're saying here. Are you saying that sparc
is currently broken, and this patch fixes it? If so, what exactly is
broken? Can you give a small example of an mmap that is currently
broken?
next prev parent reply other threads:[~2016-06-18 12:17 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-18 2:24 [PATCH v13 00/16] PCI: Fixup for 64bit resource with sparc Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 01/16] PCI: Let pci_mmap_page_range() take resource address Yinghai Lu
2016-06-18 12:17 ` Bjorn Helgaas [this message]
2016-06-22 4:32 ` Yinghai Lu
2016-06-22 15:22 ` Bjorn Helgaas
2016-06-22 19:22 ` Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 02/16] PCI: Remove __pci_mmap_make_offset() Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 03/16] PCI: Check resource alignment for /sys pci_mmap_resource path Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 04/16] sparc/PCI: Use correct offset for bus address to resource Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 05/16] PCI: Add pci_find_bus_resource() Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 06/16] sparc/PCI: Reserve legacy mmio after PCI mmio Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 07/16] sparc/PCI: Add IORESOURCE_MEM_64 for 64-bit resource in OF parsing Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 08/16] sparc/PCI: Keep resource idx order with bridge register number Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 09/16] powerpc/PCI: " Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 10/16] powerpc/PCI: Add IORESOURCE_MEM_64 for 64-bit resource in OF parsing Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 11/16] OF/PCI: Add IORESOURCE_MEM_64 for 64-bit resource Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 12/16] PCI: Check pref compatible bit for mem64 resource of PCIe device Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 13/16] PCI: Only treat non-pref mmio64 as pref if all bridges have MEM_64 Yinghai Lu
2016-06-18 2:24 ` [PATCH v13 14/16] PCI: Add has_mem64 for struct host_bridge Yinghai Lu
2016-06-18 2:25 ` [PATCH v13 15/16] PCI: Only treat non-pref mmio64 as pref if host bridge has mmio64 Yinghai Lu
2016-06-18 2:25 ` [PATCH v13 16/16] PCI: Restore pref MMIO allocation logic for host bridge without mmio64 Yinghai Lu
2016-08-08 19:49 ` [PATCH v13 00/16] PCI: Fixup for 64bit resource with sparc Bjorn Helgaas
2016-08-09 16:15 ` Yinghai Lu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160618121752.GA22721@localhost \
--to=helgaas@kernel.org \
--cc=benh@kernel.crashing.org \
--cc=bhelgaas@google.com \
--cc=davem@davemloft.net \
--cc=khalid.aziz@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-xtensa@linux-xtensa.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=sparclinux@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=weiyang@linux.vnet.ibm.com \
--cc=yinghai@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).