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mirror_ubuntu-kernels/drivers/net/ethernet/freescale
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Kevin Hao 0a4b5a2488 gianfar: Fix dma check map error when DMA_API_DEBUG is enabled 
We need to use dma_mapping_error() to check the dma address returned
by dma_map_single/page(). Otherwise we would get warning like this:
  WARNING: at lib/dma-debug.c:1140
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.18.0-rc2-next-20141029 #196
  task: c0834300 ti: effe6000 task.ti: c0874000
  NIP: c02b2c98 LR: c02b2c98 CTR: c030abc4
  REGS: effe7d70 TRAP: 0700   Not tainted  (3.18.0-rc2-next-20141029)
  MSR: 00021000 <CE,ME>  CR: 22044022  XER: 20000000

  GPR00: c02b2c98 effe7e20 c0834300 00000098 00021000 00000000 c030b898 00000003
  GPR08: 00000001 00000000 00000001 749eec9d 22044022 1001abe0 00000020 ef278678
  GPR16: ef278670 ef278668 ef278660 070a8040 c087f99c c08cdc60 00029000 c0840d44
  GPR24: c08be6e8 c0840000 effe7e78 ef041340 00000600 ef114e10 00000000 c08be6e0
  NIP [c02b2c98] check_unmap+0x51c/0x9e4
  LR [c02b2c98] check_unmap+0x51c/0x9e4
  Call Trace:
  [effe7e20] [c02b2c98] check_unmap+0x51c/0x9e4 (unreliable)
  [effe7e70] [c02b31d8] debug_dma_unmap_page+0x78/0x8c
  [effe7ed0] [c03d1640] gfar_clean_rx_ring+0x208/0x488
  [effe7f40] [c03d1a9c] gfar_poll_rx_sq+0x3c/0xa8
  [effe7f60] [c04f8714] net_rx_action+0xc0/0x178
  [effe7f90] [c00435a0] __do_softirq+0x100/0x1fc
  [effe7fe0] [c0043958] irq_exit+0xa4/0xc8
  [effe7ff0] [c000d14c] call_do_irq+0x24/0x3c
  [c0875e90] [c00048a0] do_IRQ+0x8c/0xf8
  [c0875eb0] [c000ed10] ret_from_except+0x0/0x18

For TX, we need to unmap the pages which has already been mapped and
free the skb before return.

For RX, move the dma mapping and error check to gfar_new_skb(). We
would reuse the original skb in the rx ring when either allocating
skb failure or dma mapping error.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-11 14:27:14 -05:00
..
fs_enet net: fs_enet: set back promiscuity mode after restart 2014-10-22 15:33:13 -04:00
fec_main.c net: fec: only enable mdio interrupt before phy device link up 2014-12-10 23:37:01 -05:00
fec_mpc52xx_phy.c net: fec_mpc52xx_phy: remove unnecessary dev_set_drvdata() 2013-08-21 12:27:04 -07:00
fec_mpc52xx.c fec_mpc52xx: delete unneeded test before of_node_put 2014-08-08 10:28:08 -07:00
fec_mpc52xx.h
fec_ptp.c net: fec: ptp: fix convergence issue to support LinuxPTP stack 2014-10-15 16:40:11 -04:00
fec.h net: fec: init maximum receive buffer size for ring1 and ring2 2014-11-24 15:22:57 -05:00
fsl_pq_mdio.c net/fsl_pq_mdio: Replace spin_event_timeout() with arch independent 2014-10-09 01:40:37 -04:00
gianfar_ethtool.c gianfar: Implement PAUSE frame generation support 2014-10-29 14:33:16 -04:00
gianfar_ptp.c ptp: drivers: set the number of programmable pins. 2014-03-21 14:21:14 -04:00
gianfar.c gianfar: Fix dma check map error when DMA_API_DEBUG is enabled 2014-12-11 14:27:14 -05:00
gianfar.h gianfar: Implement PAUSE frame generation support 2014-10-29 14:33:16 -04:00
Kconfig net/fsl: xgmac_mdio is dependent on OF_MDIO 2014-06-11 15:50:59 -07:00
Makefile gianfar: Remove sysfs stubs for FIFOCFG and stashing 2014-02-18 15:03:02 -05:00
ucc_geth_ethtool.c net: get rid of SET_ETHTOOL_OPS 2014-05-13 17:43:20 -04:00
ucc_geth.c net: ucc_geth: fix build failure 2014-08-10 21:40:15 -07:00
ucc_geth.h net: remove skb recycling 2012-10-07 00:40:54 -04:00
xgmac_mdio.c net/fsl: Add format length modifier to avoid negative values 2014-07-30 19:58:09 -07:00