diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2013-03-21 11:35:49 +0100 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-02-13 00:36:35 +0100 |
| commit | 810c464bf20081da758e9de12bf54d7fcd1395b0 (patch) | |
| tree | 6b71ec39514bc1d1819d74480651b0a6b209ebbd | |
| parent | 047a28b17c3aaf4c3152cbbae605f019500b74bb (diff) | |
| download | rt-linux-810c464bf20081da758e9de12bf54d7fcd1395b0.tar.gz | |
i2c/omap: drop the lock hard irq context
The lock is taken while reading two registers. On RT the first lock is
taken in hard irq where it might sleep and in the threaded irq.
The threaded irq runs in oneshot mode so the hard irq does not run until
the thread the completes so there is no reason to grab the lock.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
| -rw-r--r-- | drivers/i2c/busses/i2c-omap.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index 08d26ba61ed332..46b89dd42b1092 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -995,15 +995,12 @@ omap_i2c_isr(int irq, void *dev_id) u16 mask; u16 stat; - spin_lock(&omap->lock); - mask = omap_i2c_read_reg(omap, OMAP_I2C_IE_REG); stat = omap_i2c_read_reg(omap, OMAP_I2C_STAT_REG); + mask = omap_i2c_read_reg(omap, OMAP_I2C_IE_REG); if (stat & mask) ret = IRQ_WAKE_THREAD; - spin_unlock(&omap->lock); - return ret; } |