diff options
Diffstat (limited to 'drivers/amba')
| -rw-r--r-- | drivers/amba/bus.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index 32b0e0b930c1..110a535648d2 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -209,6 +209,7 @@ static int amba_match(struct device *dev, struct device_driver *drv) struct amba_device *pcdev = to_amba_device(dev); struct amba_driver *pcdrv = to_amba_driver(drv); + mutex_lock(&pcdev->periphid_lock); if (!pcdev->periphid) { int ret = amba_read_periphid(pcdev); @@ -218,11 +219,14 @@ static int amba_match(struct device *dev, struct device_driver *drv) * permanent failure in reading pid and cid, simply map it to * -EPROBE_DEFER. */ - if (ret) + if (ret) { + mutex_unlock(&pcdev->periphid_lock); return -EPROBE_DEFER; + } dev_set_uevent_suppress(dev, false); kobject_uevent(&dev->kobj, KOBJ_ADD); } + mutex_unlock(&pcdev->periphid_lock); /* When driver_override is set, only bind to the matching driver */ if (pcdev->driver_override) @@ -532,6 +536,7 @@ static void amba_device_release(struct device *dev) if (d->res.parent) release_resource(&d->res); + mutex_destroy(&d->periphid_lock); kfree(d); } @@ -584,6 +589,7 @@ static void amba_device_initialize(struct amba_device *dev, const char *name) dev->dev.dma_mask = &dev->dev.coherent_dma_mask; dev->dev.dma_parms = &dev->dma_parms; dev->res.name = dev_name(&dev->dev); + mutex_init(&dev->periphid_lock); } /** |