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| author | Roger Quadros <ext-roger.quadros@nokia.com> | 2009-04-23 13:50:54 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2009-04-28 18:31:38 +0200 |
| commit | f3784d834c71689336fa272df420b45345cb6b84 (patch) | |
| tree | bfed4c21b3b3360bab0eb8123595e911adfbfdcf /include/net | |
| parent | net: Avoid extra wakeups of threads blocked in wait_for_packet() (diff) | |
| download | linux-f3784d834c71689336fa272df420b45345cb6b84.tar.xz linux-f3784d834c71689336fa272df420b45345cb6b84.zip | |
Bluetooth: Ensure that HCI sysfs add/del is preempt safe
Use a different work_struct variables for add_conn() and del_conn() and
use single work queue instead of two for adding and deleting connections.
It eliminates the following error on a preemptible kernel:
[ 204.358032] Unable to handle kernel NULL pointer dereference at virtual address 0000000c
[ 204.370697] pgd = c0004000
[ 204.373443] [0000000c] *pgd=00000000
[ 204.378601] Internal error: Oops: 17 [#1] PREEMPT
[ 204.383361] Modules linked in: vfat fat rfcomm sco l2cap sd_mod scsi_mod iphb pvr2d drm omaplfb ps
[ 204.438537] CPU: 0 Not tainted (2.6.28-maemo2 #1)
[ 204.443664] PC is at klist_put+0x2c/0xb4
[ 204.447601] LR is at klist_put+0x18/0xb4
[ 204.451568] pc : [<c0270f08>] lr : [<c0270ef4>] psr: a0000113
[ 204.451568] sp : cf1b3f10 ip : cf1b3f10 fp : cf1b3f2c
[ 204.463104] r10: 00000000 r9 : 00000000 r8 : bf08029c
[ 204.468353] r7 : c7869200 r6 : cfbe2690 r5 : c78692c8 r4 : 00000001
[ 204.474945] r3 : 00000001 r2 : cf1b2000 r1 : 00000001 r0 : 00000000
[ 204.481506] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 204.488861] Control: 10c5387d Table: 887fc018 DAC: 00000017
[ 204.494628] Process btdelconn (pid: 515, stack limit = 0xcf1b22e0)
Signed-off-by: Roger Quadros <ext-roger.quadros@nokia.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/bluetooth/hci_core.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index 01f9316b4c23..1224bba24bdd 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -180,7 +180,8 @@ struct hci_conn { struct timer_list disc_timer; struct timer_list idle_timer; - struct work_struct work; + struct work_struct work_add; + struct work_struct work_del; struct device dev; |