[v4,05/15] Platform: OLPC: Avoid a warning if the EC didn't register yet
diff mbox series

Message ID 20190108175818.705110-6-lkundrak@v3.sk
State New, archived
Headers show
  • Add support for OLPC XO 1.75 Embedded Controller
Related show

Commit Message

Lubomir Rintel Jan. 8, 2019, 5:58 p.m. UTC
Just return EPROBE_DEFER, so that whoever attempted to use the EC call can
defer their work.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Pavel Machek <pavel@ucw.cz>

Changes since v2:
- Adjust the commit message for the s/ENODEV/EPROBE_DEFER/ change

Changes since v1:

 drivers/platform/olpc/olpc-ec.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff mbox series

diff --git a/drivers/platform/olpc/olpc-ec.c b/drivers/platform/olpc/olpc-ec.c
index 981955dce926..d7d51a851937 100644
--- a/drivers/platform/olpc/olpc-ec.c
+++ b/drivers/platform/olpc/olpc-ec.c
@@ -118,8 +118,11 @@  int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf, size_t outlen)
 	struct olpc_ec_priv *ec = ec_priv;
 	struct ec_cmd_desc desc;
-	/* Ensure a driver and ec hook have been registered */
-	if (WARN_ON(!ec_driver || !ec_driver->ec_cmd))
+	/* Driver not yet registered. */
+	if (!ec_driver)
+		return -EPROBE_DEFER;
+	if (WARN_ON(!ec_driver->ec_cmd))
 		return -ENODEV;
 	if (!ec)