From: Javier Cardona <javier@cozybit.com>
Date: Tue, 17 May 2011 23:13:34 +0000 (-0700)
Subject: mac80211: Don't sleep when growing the mesh path
X-Git-Tag: v3.0-rc2~7^2~16^2~19
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=d676ff493d9dfb8b34892214665028a8c85e2056;p=~emulex%2Finfiniband.git

mac80211: Don't sleep when growing the mesh path

After commit 1928ecab620907a0953f811316d05f367f3f4dba (mac80211: fix and
simplify mesh locking) mesh table allocation is performed with the
pathtbl_resize_lock taken.  Under those conditions one should not sleep.
This patch makes the allocations GFP_ATOMIC to prevent that.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 2bda0ac6232..51f6fe86d89 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -76,12 +76,12 @@ static struct mesh_table *mesh_table_alloc(int size_order)
 	int i;
 	struct mesh_table *newtbl;
 
-	newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL);
+	newtbl = kmalloc(sizeof(struct mesh_table), GFP_ATOMIC);
 	if (!newtbl)
 		return NULL;
 
 	newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) *
-			(1 << size_order), GFP_KERNEL);
+			(1 << size_order), GFP_ATOMIC);
 
 	if (!newtbl->hash_buckets) {
 		kfree(newtbl);
@@ -89,7 +89,7 @@ static struct mesh_table *mesh_table_alloc(int size_order)
 	}
 
 	newtbl->hashwlock = kmalloc(sizeof(spinlock_t) *
-			(1 << size_order), GFP_KERNEL);
+			(1 << size_order), GFP_ATOMIC);
 	if (!newtbl->hashwlock) {
 		kfree(newtbl->hash_buckets);
 		kfree(newtbl);