1. 20 Apr, 2017 2 commits
  2. 19 Apr, 2017 1 commit
    • Sergei Shtylyov's avatar
      sh_eth: unmap DMA buffers when freeing rings · 1debdc8f
      Sergei Shtylyov authored
      The DMA API debugging (when enabled) causes:
      
      WARNING: CPU: 0 PID: 1445 at lib/dma-debug.c:519 add_dma_entry+0xe0/0x12c
      DMA-API: exceeded 7 overlapping mappings of cacheline 0x01b2974d
      
      to be  printed after repeated initialization of the Ether device, e.g.
      suspend/resume or 'ifconfig' up/down. This is because DMA buffers mapped
      using dma_map_single() in sh_eth_ring_format() and sh_eth_start_xmit() are
      never unmapped. Resolve this problem by unmapping the buffers when freeing
      the descriptor  rings;  in order  to do it right, we'd have to add an extra
      parameter to sh_eth_txfree() (we rename this function to sh_eth_tx_free(),
      while at it).
      
      Based on the commit a47b70ea ("ravb: unmap descriptors when freeing
      rings").
      Signed-off-by: default avatarSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1debdc8f
  3. 18 Apr, 2017 37 commits