lkml.org 
[lkml]   [2006]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch 15/19] xirc2ps_cs: Cannot reset card in atomic context
-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Joerg Ahrens <joerg@hydrops.han.de>
I am using a Xircom CEM33 pcmcia NIC which has occasional hardware problems.
If the netdev watchdog detects a transmit timeout, do_reset is called which
msleeps - this is illegal in atomic context.

This patch schedules the timeout handling as a workqueue item.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/net/pcmcia/xirc2ps_cs.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
--- linux-2.6.17.13.orig/drivers/net/pcmcia/xirc2ps_cs.c
+++ linux-2.6.17.13/drivers/net/pcmcia/xirc2ps_cs.c
@@ -345,6 +345,7 @@ typedef struct local_info_t {
void __iomem *dingo_ccr; /* only used for CEM56 cards */
unsigned last_ptr_value; /* last packets transmitted value */
const char *manf_str;
+ struct work_struct tx_timeout_task;
} local_info_t;

/****************
@@ -352,6 +353,7 @@ typedef struct local_info_t {
*/
static int do_start_xmit(struct sk_buff *skb, struct net_device *dev);
static void do_tx_timeout(struct net_device *dev);
+static void xirc2ps_tx_timeout_task(void *data);
static struct net_device_stats *do_get_stats(struct net_device *dev);
static void set_addresses(struct net_device *dev);
static void set_multicast_list(struct net_device *dev);
@@ -589,6 +591,7 @@ xirc2ps_probe(struct pcmcia_device *link
#ifdef HAVE_TX_TIMEOUT
dev->tx_timeout = do_tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
+ INIT_WORK(&local->tx_timeout_task, xirc2ps_tx_timeout_task, dev);
#endif

return xirc2ps_config(link);
@@ -1341,17 +1344,24 @@ xirc2ps_interrupt(int irq, void *dev_id,
/*====================================================================*/

static void
-do_tx_timeout(struct net_device *dev)
+xirc2ps_tx_timeout_task(void *data)
{
- local_info_t *lp = netdev_priv(dev);
- printk(KERN_NOTICE "%s: transmit timed out\n", dev->name);
- lp->stats.tx_errors++;
+ struct net_device *dev = data;
/* reset the card */
do_reset(dev,1);
dev->trans_start = jiffies;
netif_wake_queue(dev);
}

+static void
+do_tx_timeout(struct net_device *dev)
+{
+ local_info_t *lp = netdev_priv(dev);
+ lp->stats.tx_errors++;
+ printk(KERN_NOTICE "%s: transmit timed out\n", dev->name);
+ schedule_work(&lp->tx_timeout_task);
+}
+
static int
do_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
--
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-10-10 19:21    [from the cache]
©2003-2011 Jasper Spaans