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From: Pete Zaitcev <zaitcev@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Pete Zaitcev <zaitcev@redhat.com>
Subject: virt_to_page(pci_alloc_consistent())
Date: Thu, 3 Oct 2002 02:38:14 -0400	[thread overview]
Message-ID: <20021003023814.A5856@devserv.devel.redhat.com> (raw)

Guys,

I just noticed that sound drivers use the address from
pci_alloc_consistent() as the input to virt_to_page() all
over the place. I looked into the Documentation/DMA-mapping.txt,
and it says:

  This routine will allocate RAM for that region, so it acts similarly to
  __get_free_pages (but takes size instead of a page order).

I know for fact I got it wrong in sparc in whole 2.4, and it seems
RMK got it wrong in arm. I suggest other architecture maintainers
to look at it ASAP. May even be oopsabe, by indexing outside of
mem_map[] with a suitable sound driver.

-- Pete

             reply	other threads:[~2002-10-03  6:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-03  6:38 Pete Zaitcev [this message]
2002-10-03  8:03 ` virt_to_page(pci_alloc_consistent()) David S. Miller
2002-10-03 16:25   ` virt_to_page(pci_alloc_consistent()) Pete Zaitcev
2002-10-03 17:11     ` virt_to_page(pci_alloc_consistent()) David S. Miller

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