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| author | Jarek Poplawski <jarkao2@gmail.com> | 2009-02-09 14:59:30 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-02-09 14:59:30 -0800 |
| commit | 8707bdd48ab705a459ac1b12014075a139d1d4f9 (patch) | |
| tree | 1dc59924b30949d20a6f7c4da9981005b6d612f7 /drivers | |
| parent | d4e2675a61890a84849a24affedf80d5cae8b199 (diff) | |
| download | linux-8707bdd48ab705a459ac1b12014075a139d1d4f9.tar.gz linux-8707bdd48ab705a459ac1b12014075a139d1d4f9.tar.bz2 linux-8707bdd48ab705a459ac1b12014075a139d1d4f9.zip | |
gianfar: Fix boot hangs while bringing up gianfar ethernet
Ira Snyder found that commit 8c7396aebb68994c0519e438eecdf4d5fa9c7844
"gianfar: Merge Tx and Rx interrupt for scheduling clean up ring" can
cause hangs. It's because there was removed clearing of interrupts in
gfar_schedule_cleanup() (which is called by an interrupt handler) in
case when netif scheduling has been disabled. This patch brings back
this action and a comment.
Reported-by: Ira Snyder <iws@ovro.caltech.edu>
Reported-by: Peter Korsgaard <jacmet@sunsite.dk>
Bisected-by: Ira Snyder <iws@ovro.caltech.edu>
Tested-by: Peter Korsgaard <jacmet@sunsite.dk>
Tested-by: Ira Snyder <iws@ovro.caltech.edu>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/gianfar.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c index acae2d8cd688..9b12a13a640f 100644 --- a/drivers/net/gianfar.c +++ b/drivers/net/gianfar.c @@ -1629,6 +1629,12 @@ static void gfar_schedule_cleanup(struct net_device *dev) if (netif_rx_schedule_prep(&priv->napi)) { gfar_write(&priv->regs->imask, IMASK_RTX_DISABLED); __netif_rx_schedule(&priv->napi); + } else { + /* + * Clear IEVENT, so interrupts aren't called again + * because of the packets that have already arrived. + */ + gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK); } spin_unlock(&priv->rxlock); |