From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 14 Oct 2013 14:02:15 +0000 (+0200)
Subject: ALSA: us122l: Fix pcm_usb_stream mmapping regression
X-Git-Tag: v3.12-rc6~9^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ac536a848a1643e4b87e8fbd376a63091afc2ccc;p=pandora-kernel.git

ALSA: us122l: Fix pcm_usb_stream mmapping regression

The pcm_usb_stream plugin requires the mremap explicitly for the read
buffer, as it expands itself once after reading the required size.
But the commit [314e51b9: mm: kill vma flag VM_RESERVED and
mm->reserved_vm counter] converted blindly to a combination of
VM_DONTEXPAND | VM_DONTDUMP like other normal drivers, and this
resulted in the failure of mremap().

For fixing this regression, we need to remove VM_DONTEXPAND for the
read-buffer mmap.

Reported-and-tested-by: James Miller <jamesstewartmiller@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

Reading git-diff-tree failed