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ehea: fix might sleep problem 

A mutex has to be replaced by spinlocks as it can be called from
a context which does not allow sleeping.
The kzalloc flag GFP_KERNEL has to be replaced by GFP_ATOMIC
for the same reason.

Signed-off-by: Jan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jan-Bernd Themann 2008-07-03 15:18:45 +01:00 committed by Jeff Garzik
parent 97bff0953d
commit 5c2cec143a
2 changed files with 12 additions and 12 deletions
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2
drivers/net/ehea/ehea.h
View File

@ -452,7 +452,7 @@ struct ehea_bcmc_reg_entry {
struct ehea_bcmc_reg_array {
struct ehea_bcmc_reg_entry *arr;
int num_entries;
struct mutex lock;
spinlock_t lock;
};
#define EHEA_PORT_UP 1

22
drivers/net/ehea/ehea_main.c
View File

@ -241,7 +241,7 @@ static void ehea_update_bcmc_registrations(void)
}
if (num_registrations) {
arr = kzalloc(num_registrations * sizeof(*arr), GFP_KERNEL);
arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
if (!arr)
return; /* Keep the existing array */
} else
@ -301,7 +301,7 @@ static struct net_device_stats *ehea_get_stats(struct net_device *dev)
memset(stats, 0, sizeof(*stats));
cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
cb2 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
if (!cb2) {
ehea_error("no mem for cb2");
goto out;
@ -1763,7 +1763,7 @@ static int ehea_set_mac_addr(struct net_device *dev, void *sa)
memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
mutex_lock(&ehea_bcmc_regs.lock);
spin_lock(&ehea_bcmc_regs.lock);
/* Deregister old MAC in pHYP */
if (port->state == EHEA_PORT_UP) {
@ -1785,7 +1785,7 @@ static int ehea_set_mac_addr(struct net_device *dev, void *sa)
out_upregs:
ehea_update_bcmc_registrations();
mutex_unlock(&ehea_bcmc_regs.lock);
spin_unlock(&ehea_bcmc_regs.lock);
out_free:
kfree(cb0);
out:
@ -1947,7 +1947,7 @@ static void ehea_set_multicast_list(struct net_device *dev)
}
ehea_promiscuous(dev, 0);
mutex_lock(&ehea_bcmc_regs.lock);
spin_lock(&ehea_bcmc_regs.lock);
if (dev->flags & IFF_ALLMULTI) {
ehea_allmulti(dev, 1);
@ -1978,7 +1978,7 @@ static void ehea_set_multicast_list(struct net_device *dev)
}
out:
ehea_update_bcmc_registrations();
mutex_unlock(&ehea_bcmc_regs.lock);
spin_unlock(&ehea_bcmc_regs.lock);
return;
}
@ -2497,7 +2497,7 @@ static int ehea_up(struct net_device *dev)
}
}
mutex_lock(&ehea_bcmc_regs.lock);
spin_lock(&ehea_bcmc_regs.lock);
ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
if (ret) {
@ -2520,7 +2520,7 @@ out:
ehea_info("Failed starting %s. ret=%i", dev->name, ret);
ehea_update_bcmc_registrations();
mutex_unlock(&ehea_bcmc_regs.lock);
spin_unlock(&ehea_bcmc_regs.lock);
ehea_update_firmware_handles();
mutex_unlock(&ehea_fw_handles.lock);
@ -2575,7 +2575,7 @@ static int ehea_down(struct net_device *dev)
mutex_lock(&ehea_fw_handles.lock);
mutex_lock(&ehea_bcmc_regs.lock);
spin_lock(&ehea_bcmc_regs.lock);
ehea_drop_multicast_list(dev);
ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
@ -2584,7 +2584,7 @@ static int ehea_down(struct net_device *dev)
port->state = EHEA_PORT_DOWN;
ehea_update_bcmc_registrations();
mutex_unlock(&ehea_bcmc_regs.lock);
spin_unlock(&ehea_bcmc_regs.lock);
ret = ehea_clean_all_portres(port);
if (ret)
@ -3590,7 +3590,7 @@ int __init ehea_module_init(void)
memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
mutex_init(&ehea_fw_handles.lock);
mutex_init(&ehea_bcmc_regs.lock);
spin_lock_init(&ehea_bcmc_regs.lock);
ret = check_module_parm();
if (ret)