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authorSascha Hauer <s.hauer@pengutronix.de>2008-04-16 01:44:39 +1000
committerGrant Likely <grant.likely@secretlab.ca>2008-04-29 07:18:51 -0600
commit8f3ba2dc811228213bcbdc2c8b389a8d6fa66c09 (patch)
treed4ff70539df7adfee8e0468962366791ccf7da88 /drivers/net/fec_mpc52xx.c
parent106757b38fffbe1f015b10a6d4a4f92e8a3881b9 (diff)
downloadop-kernel-dev-8f3ba2dc811228213bcbdc2c8b389a8d6fa66c09.zip
op-kernel-dev-8f3ba2dc811228213bcbdc2c8b389a8d6fa66c09.tar.gz
[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.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/net/fec_mpc52xx.c b/drivers/net/fec_mpc52xx.c
index e5e6352..d21b7ab 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;
}
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