Re: usage of RealTek 8169 crashes my Linux system

Francois Romieu
2004-03-28T22:37:34Z

[-- Attachment #1: Type: text/plain, Size: 723 bytes --]

Bernd Fuhrmann <silverbanana@gmx.de> :
[...]
> I haven't tried them yet, because I haven't seen any changes in the
> recent mm-patches to that r8169 driver (just checked all the
> announce.txt files of 2.6.5-rc1&2). Maybe I missed something.

The changes comes from the bk-netdev part of M. Morton's patchset.
The changelog is a bit terse for those (hint, hint).

> If you think one of these patches might fix it (please tell me the exact
> patch number) I will apply and test it as soon as possible.

Please try any recent -mm.

nmi_watchdog and magic sysrq are your friends. Don't expect much from
syslog though.

Once you have applied -mm patch, you may apply the attached patch as well
to help debugging.

--
Ueimor

[-- Attachment #2: r8169-break-irq-loop.patch --]
[-- Type: text/plain, Size: 1820 bytes --]

drivers/net/r8169.c | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)

diff -puN drivers/net/r8169.c~r8169-break-irq-loop drivers/net/r8169.c
--- linux-2.6.5-rc2/drivers/net/r8169.c~r8169-break-irq-loop 2004-03-24 23:52:23.000000000 +0100
+++ linux-2.6.5-rc2-fr/drivers/net/r8169.c 2004-03-24 23:56:26.000000000 +0100
@@ -1345,6 +1345,7 @@ rtl8169_tx_interrupt(struct net_device *
void *ioaddr)
{
unsigned long dirty_tx, tx_left = 0;
+ int max_try = 8192;

assert(dev != NULL);
assert(tp != NULL);
@@ -1353,7 +1354,7 @@ rtl8169_tx_interrupt(struct net_device *
dirty_tx = tp->dirty_tx;
tx_left = tp->cur_tx - dirty_tx;

- while (tx_left > 0) {
+ while ((tx_left > 0) && --max_try) {
int entry = dirty_tx % NUM_TX_DESC;

if (!(le32_to_cpu(tp->TxDescArray[entry].status) & OWNbit)) {
@@ -1371,6 +1372,9 @@ rtl8169_tx_interrupt(struct net_device *
}
}

+ if (!max_try)
+ printk(KERN_INFO "%s: strangeness in Tx handler", dev->name);
+
if (tp->dirty_tx != dirty_tx) {
tp->dirty_tx = dirty_tx;
if (netif_queue_stopped(dev))
@@ -1406,6 +1410,7 @@ rtl8169_rx_interrupt(struct net_device *
{
unsigned long cur_rx, rx_left;
int delta;
+ int max_try = 8192;

assert(dev != NULL);
assert(tp != NULL);
@@ -1414,7 +1419,7 @@ rtl8169_rx_interrupt(struct net_device *
cur_rx = tp->cur_rx;
rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;

- while (rx_left > 0) {
+ while ((rx_left > 0) && --max_try) {
int entry = cur_rx % NUM_RX_DESC;
u32 status = le32_to_cpu(tp->RxDescArray[entry].status);

@@ -1461,6 +1466,9 @@ rtl8169_rx_interrupt(struct net_device *
rx_left--;
}

+ if (!max_try)
+ printk(KERN_INFO "%s: strangeness in Rx handler", dev->name);
+
tp->cur_rx = cur_rx;

delta = rtl8169_rx_fill(tp, dev, tp->dirty_rx, tp->cur_rx);

_