aboutsummaryrefslogtreecommitdiffstats
path: root/init/calibrate.c
diff options
context:
space:
mode:
authorMika Westerberg <mika.westerberg@linux.intel.com>2011-06-23 13:39:00 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2011-06-23 08:54:10 -0700
commit33b1e6939f5c37ab8e64280fd3d54046607b5c80 (patch)
treec53385b58148cc1bc397e67afafaef6e5ebc898b /init/calibrate.c
parent0bb04bf3dfdfe1c981087cdfb0d9d772c3a0ba55 (diff)
downloadautogen-33b1e6939f5c37ab8e64280fd3d54046607b5c80.tar.gz
autogen-33b1e6939f5c37ab8e64280fd3d54046607b5c80.tar.xz
autogen-33b1e6939f5c37ab8e64280fd3d54046607b5c80.zip
serial: mrst_max3110: initialize waitqueue earlier
The driver went to initialize its waitqueue at the start of the main processing thread. However, it is possible that this thread is not scheduled on a CPU before the write function is called which leads to a following error: BUG: spinlock bad magic on CPU#1, swapper/1 lock: f5f3ebdc, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0 Pid: 1, comm: swapper Not tainted 3.0.0-rc2+ #67 Call Trace: [<c1289663>] spin_bug+0xa3/0xf0 [<c12897ad>] do_raw_spin_lock+0x7d/0x150 [<c14963de>] _raw_spin_lock_irqsave+0x4e/0x60 [<c102f2bb>] __wake_up+0x1b/0x50 [<c12d3715>] serial_m3110_con_write+0x55/0x60 [<c1041575>] __call_console_drivers+0x75/0x90 [<c10415d9>] _call_console_drivers+0x49/0x80 [<c1041baa>] console_unlock+0xca/0x1f0 [<c10420ef>] vprintk+0x18f/0x4f0 [<c14928a3>] printk+0x18/0x1a [<c1042730>] register_console+0x2e0/0x350 [<c12d098e>] uart_add_one_port+0x33e/0x3d0 [<c1485ba6>] serial_m3110_probe+0x1c2/0x1df [<c1303db7>] spi_drv_probe+0x17/0x20 ... Fix this by initializing the waitqueue before the main thread is created. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init/calibrate.c')
0 files changed, 0 insertions, 0 deletions