summaryrefslogtreecommitdiff
path: root/drivers/amba/bus.c
diff options
context:
space:
mode:
authorPaolo Abeni <pabeni@redhat.com>2022-09-08 18:34:54 +0200
committerPaolo Abeni <pabeni@redhat.com>2022-09-08 18:38:30 +0200
commit9f8f1933dce555d3c246f447f54fca8de8889da9 (patch)
treedc447d0174473de8385d47eb8aedc058a336e4a9 /drivers/amba/bus.c
parent75554fe00f941c3c3d9344e88708093a14d2b4b8 (diff)
parent26b1224903b3fb66e8aa564868d0d57648c32b15 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
drivers/net/ethernet/freescale/fec.h 7d650df99d52 ("net: fec: add pm_qos support on imx6q platform") 40c79ce13b03 ("net: fec: add stop mode support for imx8 platform") Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/amba/bus.c')
-rw-r--r--drivers/amba/bus.c8
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);
}
/**