target/linux/lantiq/patches-3.2/0021-NET-MIPS-lantiq-return-value-of-request_irq-was-not-.patch

   1 From 6916ef9742e45213d524b69700d937976098d1e6 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Tue, 15 Nov 2011 15:56:06 +0100
   4 Subject: [PATCH 21/70] NET: MIPS: lantiq: return value of request_irq was not
   5  handled gracefully
   6
   7 The return values of request_irq() were not checked leading to the following
   8 error message.
   9
  10 drivers/net/ethernet/lantiq_etop.c: In function 'ltq_etop_hw_init':
  11 drivers/net/ethernet/lantiq_etop.c:368:15: warning: ignoring return value of 'request_irq', declared with attribute warn_unused_result
  12 drivers/net/ethernet/lantiq_etop.c:377:15: warning: ignoring return value of 'request_irq', declared with attribute warn_unused_result
  13
  14 Signed-off-by: John Crispin <blogic@openwrt.org>
  15 Cc: netdev@vger.kernel.org
  16 ---
  17  drivers/net/ethernet/lantiq_etop.c |   14 ++++++++------
  18  1 files changed, 8 insertions(+), 6 deletions(-)
  19
  20 --- a/drivers/net/ethernet/lantiq_etop.c
  21 +++ b/drivers/net/ethernet/lantiq_etop.c
  22 @@ -312,6 +312,7 @@ ltq_etop_hw_init(struct net_device *dev)
  23  {
  24         struct ltq_etop_priv *priv = netdev_priv(dev);
  25         unsigned int mii_mode = priv->pldata->mii_mode;
  26 +       int err = 0;
  27         int i;
  28
  29         ltq_pmu_enable(PMU_PPE);
  30 @@ -356,7 +357,7 @@ ltq_etop_hw_init(struct net_device *dev)
  31
  32         ltq_dma_init_port(DMA_PORT_ETOP);
  33
  34 -       for (i = 0; i < MAX_DMA_CHAN; i++) {
  35 +       for (i = 0; i < MAX_DMA_CHAN && !err; i++) {
  36                 int irq = LTQ_DMA_ETOP + i;
  37                 struct ltq_etop_chan *ch = &priv->ch[i];
  38
  39 @@ -364,21 +365,22 @@ ltq_etop_hw_init(struct net_device *dev)
  40
  41                 if (IS_TX(i)) {
  42                         ltq_dma_alloc_tx(&ch->dma);
  43 -                       request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
  44 +                       err = request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
  45                                 "etop_tx", priv);
  46                 } else if (IS_RX(i)) {
  47                         ltq_dma_alloc_rx(&ch->dma);
  48                         for (ch->dma.desc = 0; ch->dma.desc < LTQ_DESC_NUM;
  49                                         ch->dma.desc++)
  50                                 if (ltq_etop_alloc_skb(ch))
  51 -                                       return -ENOMEM;
  52 +                                       err = -ENOMEM;
  53                         ch->dma.desc = 0;
  54 -                       request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
  55 +                       err = request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
  56                                 "etop_rx", priv);
  57                 }
  58 -               ch->dma.irq = irq;
  59 +               if (!err)
  60 +                       ch->dma.irq = irq;
  61         }
  62 -       return 0;
  63 +       return err;
  64  }
  65
  66  static void