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OpenCloudOS-Kernel
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sparc: Move of_set_property_mutex acquisition outside of devtree_lock grab. 

Otherwise we try to sleep with preemption disabled, etc.

Noticed by Thomas Gleixner.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2009-11-08 17:41:20 -08:00
parent 88b938e63e
commit 1c9d80ddc6
1 changed files with 2 additions and 2 deletions
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4
arch/sparc/kernel/prom_common.c
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@ -79,6 +79,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
err = -ENODEV;
mutex_lock(&of_set_property_mutex);
write_lock(&devtree_lock);
prevp = &dp->properties;
while (*prevp) {
@ -88,9 +89,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
void *old_val = prop->value;
int ret;
mutex_lock(&of_set_property_mutex);
ret = prom_setprop(dp->node, name, val, len);
mutex_unlock(&of_set_property_mutex);
err = -EINVAL;
if (ret >= 0) {
@ -109,6 +108,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
prevp = &(*prevp)->next;
}
write_unlock(&devtree_lock);
mutex_unlock(&of_set_property_mutex);
/* XXX Upate procfs if necessary... */