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| author | Roel Kluin <roel.kluin@gmail.com> | 2009-03-04 00:05:56 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-03-04 00:11:52 -0800 |
| commit | b9bdcd9bd78d253dcc8e13c29f0acd67e080e7c1 (patch) | |
| tree | 6ee1908315df4e2347c16eb63fee6bd2762a749b /drivers/net/pcmcia | |
| parent | 858b9ced6e73a0f087294c398a1ae70a7eeed94f (diff) | |
| download | linux-b9bdcd9bd78d253dcc8e13c29f0acd67e080e7c1.tar.gz linux-b9bdcd9bd78d253dcc8e13c29f0acd67e080e7c1.tar.bz2 linux-b9bdcd9bd78d253dcc8e13c29f0acd67e080e7c1.zip | |
net pcmcia: worklimit reaches -1
with while (--worklimit >= 0); worklimit reaches -1 after the loop. In
3c589_cs.c this caused a warning not to be printed.
In 3c574_cs.c contrastingly, el3_rx() treats worklimit differently:
static int el3_rx(struct net_device *dev, int worklimit)
{
while (--worklimit >= 0) { ... }
return worklimit;
}
el3_rx() is only called by function el3_interrupt(): twice:
static irqreturn_t el3_interrupt(int irq, void *dev_id)
{
int work_budget = max_interrupt_work;
while(...) {
if (...)
work_budget = el3_rx(dev, work_budget);
if (...)
work_budget = el3_rx(dev, work_budget);
if (--work_budget < 0) {
...
break;
}
}
}
The error path can occur 2 too early.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/pcmcia')
| -rw-r--r-- | drivers/net/pcmcia/3c574_cs.c | 3 | ||||
| -rw-r--r-- | drivers/net/pcmcia/3c589_cs.c | 3 |
2 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/pcmcia/3c574_cs.c b/drivers/net/pcmcia/3c574_cs.c index e5cb6b1f0ebd..2404a838b1fe 100644 --- a/drivers/net/pcmcia/3c574_cs.c +++ b/drivers/net/pcmcia/3c574_cs.c @@ -1035,7 +1035,8 @@ static int el3_rx(struct net_device *dev, int worklimit) DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n", dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus)); while (!((rx_status = inw(ioaddr + RxStatus)) & 0x8000) && - (--worklimit >= 0)) { + worklimit > 0) { + worklimit--; if (rx_status & 0x4000) { /* Error, update stats. */ short error = rx_status & 0x3800; dev->stats.rx_errors++; diff --git a/drivers/net/pcmcia/3c589_cs.c b/drivers/net/pcmcia/3c589_cs.c index 73ecc657999d..1e01b8a6dbf3 100644 --- a/drivers/net/pcmcia/3c589_cs.c +++ b/drivers/net/pcmcia/3c589_cs.c @@ -857,7 +857,8 @@ static int el3_rx(struct net_device *dev) DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n", dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS)); while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) && - (--worklimit >= 0)) { + worklimit > 0) { + worklimit--; if (rx_status & 0x4000) { /* Error, update stats. */ short error = rx_status & 0x3800; dev->stats.rx_errors++; |