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From: Yinghai Lu <yinghai@kernel.org>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: Yongji Xie <elohimes@gmail.com>,
	Li Zhong <zhong@linux.vnet.ibm.com>,
	Alexey Kardashevskiy <aik@ozlabs.ru>,
	"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	Gavin Shan <gwshan@linux.vnet.ibm.com>,
	Alex Williamson <alex.williamson@redhat.com>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH v11 2/7] PCI: A fix for caculating bridge window's size and alignment
Date: Mon, 17 Apr 2017 14:45:31 -0700	[thread overview]
Message-ID: <CAE9FiQW0ds9fXmu77eJscBhYQnQKa9J=+KWThEwC3Kc++YCE-Q@mail.gmail.com> (raw)
In-Reply-To: <20170417213639.21092.22951.stgit@bhelgaas-glaptop.roam.corp.google.com>

On Mon, Apr 17, 2017 at 2:36 PM, Bjorn Helgaas <bhelgaas@google.com> wrote:
> From: Yongji Xie <elohimes@gmail.com>
>
> In case that one device's alignment is greater than its size,
> we may get an incorrect size and alignment for its bus's memory
> window in pbus_size_mem(). This patch fixes this case.

In which case, that device alignment is not same as size?
or powerpc need small size, but alignment is PAGE_SIZE?

Thanks

Yinghai

  reply	other threads:[~2017-04-17 21:45 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-17 21:36 [PATCH v11 0/7] PCI: Introduce a way to enforce all MMIO BARs not to share PAGE_SIZE Bjorn Helgaas
2017-04-17 21:36 ` [PATCH v11 1/7] PCI: Ignore requested alignment for IOV BARs Bjorn Helgaas
2017-04-17 21:36 ` [PATCH v11 2/7] PCI: A fix for caculating bridge window's size and alignment Bjorn Helgaas
2017-04-17 21:45   ` Yinghai Lu [this message]
2017-04-18  2:16     ` Yongji Xie
2017-04-17 21:36 ` [PATCH v11 3/7] PCI: Add pcibios_default_alignment() for arch-specific alignment control Bjorn Helgaas
2017-04-17 21:36 ` [PATCH v11 4/7] powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned Bjorn Helgaas
2017-04-18  5:30   ` Michael Ellerman
2017-04-18 13:53   ` Bjorn Helgaas
2017-04-19  1:47     ` Michael Ellerman
2017-04-19  2:12       ` Yongji Xie
2017-04-19 17:53         ` Bjorn Helgaas
2017-04-17 21:37 ` [PATCH v11 5/7] PCI: Factor pci_reassigndev_resource_alignment() Bjorn Helgaas
2017-04-17 21:37 ` [PATCH v11 6/7] PCI: Don't reassign resources that are already aligned Bjorn Helgaas
2017-04-17 21:37 ` [PATCH v11 7/7] PCI: Don't resize resources when realigning all devices in system Bjorn Helgaas

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