diff mbox series

coresight: Defer probe when the child dev is not probed

Message ID 20220228133112.3987-1-quic_jinlmao@quicinc.com
State New
Headers show
Series coresight: Defer probe when the child dev is not probed | expand

Commit Message

Mao Jinlong Feb. 28, 2022, 1:31 p.m. UTC 
From: Mao Jinlong <jinlmao@qti.qualcomm.com>

It is possible that when device probe, its child device is not
probed. Then it will fail when add sysfs connection for the device.
Make device defer probe when the child device is not probed.

Signed-off-by: Mao Jinlong <jinlmao@qti.qualcomm.com>
---
 drivers/hwtracing/coresight/coresight-sysfs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c
index 34d2a2d31d00..7df9eb59bf2c 100644
--- a/drivers/hwtracing/coresight/coresight-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-sysfs.c
@@ -73,8 +73,10 @@  int coresight_add_sysfs_link(struct coresight_sysfs_link *info)
 	if (!info->orig || !info->target ||
 	    !info->orig_name || !info->target_name)
 		return -EINVAL;
-	if (!info->orig->has_conns_grp || !info->target->has_conns_grp)
+	if (!info->orig->has_conns_grp)
 		return -EINVAL;
+	if (!info->target->has_conns_grp)
+		return -EPROBE_DEFER;
 
 	/* first link orig->target */
 	ret = sysfs_add_link_to_group(&info->orig->dev.kobj,