From: Srinivas Kandagatla <[email protected]> device status update can be racy with probe in some cases, so make sure it take lock during the probe. Also after probe the device is expected to be ready for communications, so make sure that a logical address can be assigned to it after probe. If it fails to do so then probe defer such instances.
Signed-off-by: Srinivas Kandagatla <[email protected]> --- drivers/slimbus/core.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/slimbus/core.c b/drivers/slimbus/core.c index 31f2910..262591f 100644 --- a/drivers/slimbus/core.c +++ b/drivers/slimbus/core.c @@ -40,8 +40,23 @@ static int slim_device_probe(struct device *dev) { struct slim_device *sbdev = to_slim_device(dev); struct slim_driver *sbdrv = to_slim_driver(dev->driver); + int ret; + + ret = sbdrv->probe(sbdev); + if (ret) + return ret; - return sbdrv->probe(sbdev); + /* try getting the logical address after probe */ + ret = slim_get_logical_addr(sbdev); + if (!ret) { + if (sbdrv->device_status) + sbdrv->device_status(sbdev, sbdev->status); + } else { + dev_err(&sbdev->dev, "Failed to get logical address\n"); + ret = -EPROBE_DEFER; + } + + return ret; } static int slim_device_remove(struct device *dev) -- 2.9.3
