package/kernel/mac80211/patches/305-b43-fix-NULL-pointer-dereference-in-b43_phy_copy.patch

   1 From: Hauke Mehrtens <hauke@hauke-m.de>
   2 Date: Wed, 5 Nov 2014 23:31:07 +0100
   3 Subject: [PATCH] b43: fix NULL pointer dereference in b43_phy_copy()
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   7
   8 phy_read and phy_write are not set for every phy any more sine this:
   9 commit d342b95dd735014a590f9051b1ba227eb54ca8f6
  10 Author: RafaÅ‚ MiÅ‚ecki <zajec5@gmail.com>
  11 Date:   Thu Jul 31 21:59:43 2014 +0200
  12
  13     b43: don't duplicate common PHY read/write ops
  14
  15 b43_phy_copy() accesses phy_read and phy_write directly and will fail
  16 with some phys. This patch fixes the regression by using the
  17 b43_phy_read() and b43_phy_write() functions which should be used for
  18 read and write access.
  19
  20 This should fix this bug report:
  21 https://bugzilla.kernel.org/show_bug.cgi?id=87731
  22
  23 Reported-by: Volker Kempter <v.kempter@pe.tu-clausthal.de>
  24 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  25 ---
  26
  27 --- a/drivers/net/wireless/b43/phy_common.c
  28 +++ b/drivers/net/wireless/b43/phy_common.c
  29 @@ -301,8 +301,7 @@ void b43_phy_write(struct b43_wldev *dev
  30  void b43_phy_copy(struct b43_wldev *dev, u16 destreg, u16 srcreg)
  31  {
  32         assert_mac_suspended(dev);
  33 -       dev->phy.ops->phy_write(dev, destreg,
  34 -               dev->phy.ops->phy_read(dev, srcreg));
  35 +       b43_phy_write(dev, destreg, b43_phy_read(dev, srcreg));
  36  }
  37
  38  void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)