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authorDave Young <hidave.darkstar@gmail.com>2009-10-18 20:24:41 +0000
committerDavid S. Miller <davem@davemloft.net>2009-10-19 19:36:45 -0700
commitf74c77cb1124a11acf69c98d10c0fdc22f322664 (patch)
tree432ed5d118c00a274feae1a9dc3d494ec9b15ce1
parentb103cf34382f26ff48a87931b83f13b177b47c1a (diff)
bluetooth: scheduling while atomic bug fix
Due to driver core changes dev_set_drvdata will call kzalloc which should be in might_sleep context, but hci_conn_add will be called in atomic context Like dev_set_name move dev_set_drvdata to work queue function. oops as following: Oct 2 17:41:59 darkstar kernel: [ 438.001341] BUG: sleeping function called from invalid context at mm/slqb.c:1546 Oct 2 17:41:59 darkstar kernel: [ 438.001345] in_atomic(): 1, irqs_disabled(): 0, pid: 2133, name: sdptool Oct 2 17:41:59 darkstar kernel: [ 438.001348] 2 locks held by sdptool/2133: Oct 2 17:41:59 darkstar kernel: [ 438.001350] #0: (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.+.}, at: [<faa1d2f5>] lock_sock+0xa/0xc [l2cap] Oct 2 17:41:59 darkstar kernel: [ 438.001360] #1: (&hdev->lock){+.-.+.}, at: [<faa20e16>] l2cap_sock_connect+0x103/0x26b [l2cap] Oct 2 17:41:59 darkstar kernel: [ 438.001371] Pid: 2133, comm: sdptool Not tainted 2.6.31-mm1 #2 Oct 2 17:41:59 darkstar kernel: [ 438.001373] Call Trace: Oct 2 17:41:59 darkstar kernel: [ 438.001381] [<c022433f>] __might_sleep+0xde/0xe5 Oct 2 17:41:59 darkstar kernel: [ 438.001386] [<c0298843>] __kmalloc+0x4a/0x15a Oct 2 17:41:59 darkstar kernel: [ 438.001392] [<c03f0065>] ? kzalloc+0xb/0xd Oct 2 17:41:59 darkstar kernel: [ 438.001396] [<c03f0065>] kzalloc+0xb/0xd Oct 2 17:41:59 darkstar kernel: [ 438.001400] [<c03f04ff>] device_private_init+0x15/0x3d Oct 2 17:41:59 darkstar kernel: [ 438.001405] [<c03f24c5>] dev_set_drvdata+0x18/0x26 Oct 2 17:41:59 darkstar kernel: [ 438.001414] [<fa51fff7>] hci_conn_init_sysfs+0x40/0xd9 [bluetooth] Oct 2 17:41:59 darkstar kernel: [ 438.001422] [<fa51cdc0>] ? hci_conn_add+0x128/0x186 [bluetooth] Oct 2 17:41:59 darkstar kernel: [ 438.001429] [<fa51ce0f>] hci_conn_add+0x177/0x186 [bluetooth] Oct 2 17:41:59 darkstar kernel: [ 438.001437] [<fa51cf8a>] hci_connect+0x3c/0xfb [bluetooth] Oct 2 17:41:59 darkstar kernel: [ 438.001442] [<faa20e87>] l2cap_sock_connect+0x174/0x26b [l2cap] Oct 2 17:41:59 darkstar kernel: [ 438.001448] [<c04c8df5>] sys_connect+0x60/0x7a Oct 2 17:41:59 darkstar kernel: [ 438.001453] [<c024b703>] ? lock_release_non_nested+0x84/0x1de Oct 2 17:41:59 darkstar kernel: [ 438.001458] [<c028804b>] ? might_fault+0x47/0x81 Oct 2 17:41:59 darkstar kernel: [ 438.001462] [<c028804b>] ? might_fault+0x47/0x81 Oct 2 17:41:59 darkstar kernel: [ 438.001468] [<c033361f>] ? __copy_from_user_ll+0x11/0xce Oct 2 17:41:59 darkstar kernel: [ 438.001472] [<c04c9419>] sys_socketcall+0x82/0x17b Oct 2 17:41:59 darkstar kernel: [ 438.001477] [<c020329d>] syscall_call+0x7/0xb Signed-off-by: Dave Young <hidave.darkstar@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/bluetooth/hci_sysfs.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 7f939ce29801..2bc6f6a8de68 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -92,6 +92,8 @@ static void add_conn(struct work_struct *work)
dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
+ dev_set_drvdata(&conn->dev, conn);
+
if (device_add(&conn->dev) < 0) {
BT_ERR("Failed to register connection device");
return;
@@ -144,8 +146,6 @@ void hci_conn_init_sysfs(struct hci_conn *conn)
conn->dev.class = bt_class;
conn->dev.parent = &hdev->dev;
- dev_set_drvdata(&conn->dev, conn);
-
device_initialize(&conn->dev);
INIT_WORK(&conn->work_add, add_conn);