linux-kernel - [PATCH] base: dd: don't remove driver_data in -EPROBE

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Date:	Tue,  8 Mar 2016 23:15:22 +0800
From:	Yi Zhang <yizhang_hust@....com>
To:	gregkh@...uxfoundation.org
Cc:	linux-kernel@...r.kernel.org, Yi Zhang <yizhang_hust@....com>
Subject: [PATCH] base: dd: don't remove driver_data in -EPROBE_DEFER case

the driver_data may be used for sanity check, it fails the
probe() if driver_data is NULL after it is re-triggered.
for example, soc_probe() in sound/soc/soc-core.c

Signed-off-by: Yi Zhang <yizhang_hust@....com>
---
 drivers/base/dd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index c4da2df..30c53d3 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -402,7 +402,8 @@ pinctrl_bind_failed:
 	devres_release_all(dev);
 	driver_sysfs_remove(dev);
 	dev->driver = NULL;
-	dev_set_drvdata(dev, NULL);
+	if (ret != -EPROBE_DEFER)
+		dev_set_drvdata(dev, NULL);
 	if (dev->pm_domain && dev->pm_domain->dismiss)
 		dev->pm_domain->dismiss(dev);
 	pm_runtime_reinit(dev);
-- 
1.9.1