diff options
| author | Michael Chan | 2006-07-25 16:38:29 -0700 |
|---|---|---|
| committer | David S. Miller | 2006-07-25 16:38:29 -0700 |
| commit | 32d8c5724b7b05c7d8f7386c49432104cc222e32 (patch) | |
| tree | 6aead952a08a295135c5faf7da5ff8523a6e4616 /drivers | |
| parent | b9ec6c1b917e2e43a058a78198d54aeca3d71c6f (diff) | |
[TG3]: Handle tg3_init_rings() failures
Handle dev_alloc_skb() failures when initializing the RX rings.
Without proper handling, the driver will crash when using a partial
ring.
Thanks to Stephane Doyon <sdoyon@max-t.com> for reporting the bug and
providing the initial patch.
Howie Xu <howie@vmware.com> also reported the same issue.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/tg3.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 1253cec6ebdc..d66b06f2b865 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -4258,7 +4258,7 @@ static void tg3_free_rings(struct tg3 *tp) * end up in the driver. tp->{tx,}lock are held and thus * we may not sleep. */ -static void tg3_init_rings(struct tg3 *tp) +static int tg3_init_rings(struct tg3 *tp) { u32 i; @@ -4307,18 +4307,38 @@ static void tg3_init_rings(struct tg3 *tp) /* Now allocate fresh SKBs for each rx ring. */ for (i = 0; i < tp->rx_pending; i++) { - if (tg3_alloc_rx_skb(tp, RXD_OPAQUE_RING_STD, - -1, i) < 0) + if (tg3_alloc_rx_skb(tp, RXD_OPAQUE_RING_STD, -1, i) < 0) { + printk(KERN_WARNING PFX + "%s: Using a smaller RX standard ring, " + "only %d out of %d buffers were allocated " + "successfully.\n", + tp->dev->name, i, tp->rx_pending); + if (i == 0) + return -ENOMEM; + tp->rx_pending = i; break; + } } if (tp->tg3_flags & TG3_FLAG_JUMBO_RING_ENABLE) { for (i = 0; i < tp->rx_jumbo_pending; i++) { if (tg3_alloc_rx_skb(tp, RXD_OPAQUE_RING_JUMBO, - -1, i) < 0) + -1, i) < 0) { + printk(KERN_WARNING PFX + "%s: Using a smaller RX jumbo ring, " + "only %d out of %d buffers were " + "allocated successfully.\n", + tp->dev->name, i, tp->rx_jumbo_pending); + if (i == 0) { + tg3_free_rings(tp); + return -ENOMEM; + } + tp->rx_jumbo_pending = i; break; + } } } + return 0; } /* @@ -5969,7 +5989,9 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy) * can only do this after the hardware has been * successfully reset. */ - tg3_init_rings(tp); + err = tg3_init_rings(tp); + if (err) + return err; /* This value is determined during the probe time DMA * engine test, tg3_test_dma. |