1. 22 Jan, 2010 1 commit
  2. 21 Dec, 2009 1 commit
    • Shaun Ruffell's avatar
      dma-debug: Do not add notifier when dma debugging is disabled. · f797d988
      Shaun Ruffell authored
      If CONFIG_HAVE_DMA_API_DEBUG is defined and "dma_debug=off" is
      specified on the kernel command line, when you detach a driver from a
      device you can cause the following NULL pointer dereference:
      
      BUG: unable to handle kernel NULL pointer dereference at (null)
      IP: [<c0580d35>] dma_debug_device_change+0x5d/0x117
      
      The problem is that the dma_debug_device_change notifier function is
      added to the bus notifier chain even though the dma_entry_hash array
      was never initialized.  If dma debugging is disabled, this patch both
      prevents dma_debug_device_change notifiers from being added to the
      chain, and additionally ensures that the dma_debug_device_change
      notifier function is a no-op.
      
      Cc: stable@kernel.org
      Signed-off-by: default avatarShaun Ruffell <sruffell@digium.com>
      Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
      f797d988
  3. 18 Dec, 2009 9 commits
  4. 17 Dec, 2009 29 commits