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[PATCH] xirc2ps_cs: Cannot reset card in atomic context 

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>
This commit is contained in:
Joerg Ahrens 2006-08-20 21:51:57 +01:00 committed by Jeff Garzik
parent cb958186ed
commit 9a469abe9c
1 changed files with 14 additions and 4 deletions
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18
drivers/net/pcmcia/xirc2ps_cs.c
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@ -345,6 +345,7 @@ typedef struct local_info_t {
void __iomem *dingo_ccr; /* only used for CEM56 cards */ void __iomem *dingo_ccr; /* only used for CEM56 cards */
unsigned last_ptr_value; /* last packets transmitted value */ unsigned last_ptr_value; /* last packets transmitted value */
const char *manf_str; const char *manf_str;
struct work_struct tx_timeout_task;
} local_info_t; } 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 int do_start_xmit(struct sk_buff *skb, struct net_device *dev);
static void do_tx_timeout(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 struct net_device_stats *do_get_stats(struct net_device *dev);
static void set_addresses(struct net_device *dev); static void set_addresses(struct net_device *dev);
static void set_multicast_list(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 #ifdef HAVE_TX_TIMEOUT
dev->tx_timeout = do_tx_timeout; dev->tx_timeout = do_tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT; dev->watchdog_timeo = TX_TIMEOUT;
INIT_WORK(&local->tx_timeout_task, xirc2ps_tx_timeout_task, dev);
#endif #endif
return xirc2ps_config(link); return xirc2ps_config(link);
@ -1341,17 +1344,24 @@ xirc2ps_interrupt(int irq, void *dev_id, struct pt_regs *regs)
/*====================================================================*/ /*====================================================================*/
static void static void
do_tx_timeout(struct net_device *dev) xirc2ps_tx_timeout_task(void *data)
{ {
local_info_t *lp = netdev_priv(dev); struct net_device *dev = data;
printk(KERN_NOTICE "%s: transmit timed out\n", dev->name);
lp->stats.tx_errors++;
/* reset the card */ /* reset the card */
do_reset(dev,1); do_reset(dev,1);
dev->trans_start = jiffies; dev->trans_start = jiffies;
netif_wake_queue(dev); 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 static int
do_start_xmit(struct sk_buff *skb, struct net_device *dev) do_start_xmit(struct sk_buff *skb, struct net_device *dev)
{ {