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authorRoel Kluin <roel.kluin@gmail.com>2009-03-04 00:05:56 -0800
committerDavid S. Miller <davem@davemloft.net>2009-03-04 00:11:52 -0800
commitb9bdcd9bd78d253dcc8e13c29f0acd67e080e7c1 (patch)
tree6ee1908315df4e2347c16eb63fee6bd2762a749b /drivers/net
parent858b9ced6e73a0f087294c398a1ae70a7eeed94f (diff)
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')
-rw-r--r--drivers/net/pcmcia/3c574_cs.c3
-rw-r--r--drivers/net/pcmcia/3c589_cs.c3
2 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/pcmcia/3c574_cs.c b/drivers/net/pcmcia/3c574_cs.c
index e5cb6b1f0eb..2404a838b1f 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 73ecc657999..1e01b8a6dbf 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++;