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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2008-04-16 01:44:39 +1000 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2008-04-29 07:18:51 -0600 |
| commit | 8f3ba2dc811228213bcbdc2c8b389a8d6fa66c09 (patch) | |
| tree | d4ff70539df7adfee8e0468962366791ccf7da88 /drivers/net/fec_mpc52xx.c | |
| parent | 106757b38fffbe1f015b10a6d4a4f92e8a3881b9 (diff) | |
| download | linux-8f3ba2dc811228213bcbdc2c8b389a8d6fa66c09.tar.gz linux-8f3ba2dc811228213bcbdc2c8b389a8d6fa66c09.tar.bz2 linux-8f3ba2dc811228213bcbdc2c8b389a8d6fa66c09.zip | |
[POWERPC] mpc5200: Fix FEC error handling on FIFO errors
The error handling for the mpc5200 fec interrupt is broken. The intended
behaviour is like this:
* If one of FEC_IEVENT_RFIFO_ERROR and FEC_IEVENT_XFIFO_ERROR happens,
the datasheet says (MPC5200B User's Guide R1.2, p. 14-13): "When this
occurs, software must ensure both the FIFO Controller and BestComm are
soft-reset".
* On any other error (non-TFINT) interrupt, just issue a debug message.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/net/fec_mpc52xx.c')
| -rw-r--r-- | drivers/net/fec_mpc52xx.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/net/fec_mpc52xx.c b/drivers/net/fec_mpc52xx.c index e5e6352556fa..d21b7ab64bd1 100644 --- a/drivers/net/fec_mpc52xx.c +++ b/drivers/net/fec_mpc52xx.c @@ -491,20 +491,23 @@ static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id) out_be32(&fec->ievent, ievent); /* clear pending events */ - if (ievent & ~(FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) { - if (ievent & ~FEC_IEVENT_TFINT) - dev_dbg(&dev->dev, "ievent: %08x\n", ievent); + /* on fifo error, soft-reset fec */ + if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) { + + if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR)) + dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n"); + if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR)) + dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n"); + + mpc52xx_fec_reset(dev); + + netif_wake_queue(dev); return IRQ_HANDLED; } - if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR)) - dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n"); - if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR)) - dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n"); + if (ievent & ~FEC_IEVENT_TFINT) + dev_dbg(&dev->dev, "ievent: %08x\n", ievent); - mpc52xx_fec_reset(dev); - - netif_wake_queue(dev); return IRQ_HANDLED; } |