lkml.org 
[lkml]   [2018]   [Mar]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL for 4.15 30/78] platform/chrome: Use proper protocol transfer function
Date
From: Shawn Nematbakhsh <shawnn@chromium.org>

[ Upstream commit d48b8c58c57f6edbe2965f0a5f62c5cf9593ca96 ]

pkt_xfer should be used for protocol v3, and cmd_xfer otherwise. We had
one instance of these functions correct, but not the second, fall-back
case. We use the fall-back only when the first command returns an
IN_PROGRESS status, which is only used on some EC firmwares where we
don't want to constantly poll the bus, but instead back off and
sleep/retry for a little while.

Fixes: 2c7589af3c4d ("mfd: cros_ec: add proto v3 skeleton")
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
drivers/platform/chrome/cros_ec_proto.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 8dfa7fcb1248..e7bbdf947bbc 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -60,12 +60,14 @@ static int send_command(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg)
{
int ret;
+ int (*xfer_fxn)(struct cros_ec_device *ec, struct cros_ec_command *msg);

if (ec_dev->proto_version > 2)
- ret = ec_dev->pkt_xfer(ec_dev, msg);
+ xfer_fxn = ec_dev->pkt_xfer;
else
- ret = ec_dev->cmd_xfer(ec_dev, msg);
+ xfer_fxn = ec_dev->cmd_xfer;

+ ret = (*xfer_fxn)(ec_dev, msg);
if (msg->result == EC_RES_IN_PROGRESS) {
int i;
struct cros_ec_command *status_msg;
@@ -88,7 +90,7 @@ static int send_command(struct cros_ec_device *ec_dev,
for (i = 0; i < EC_COMMAND_RETRIES; i++) {
usleep_range(10000, 11000);

- ret = ec_dev->cmd_xfer(ec_dev, status_msg);
+ ret = (*xfer_fxn)(ec_dev, status_msg);
if (ret < 0)
break;

--
2.14.1
\
 
 \ /
  Last update: 2018-03-08 05:57    [W:1.356 / U:0.032 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site