This is a note to let you know that I've just added the patch titled
platform/chrome: Use proper protocol transfer function
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
platform-chrome-use-proper-protocol-transfer-function.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Mar 22 14:57:33 CET 2018
From: Shawn Nematbakhsh <shawnn@xxxxxxxxxxxx>
Date: Fri, 8 Sep 2017 13:50:11 -0700
Subject: platform/chrome: Use proper protocol transfer function
From: Shawn Nematbakhsh <shawnn@xxxxxxxxxxxx>
[ 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@xxxxxxxxxxxx>
Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
Reviewed-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
Signed-off-by: Benson Leung <bleung@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/platform/chrome/cros_ec_proto.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -59,12 +59,14 @@ static int send_command(struct cros_ec_d
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;
@@ -87,7 +89,7 @@ static int send_command(struct cros_ec_d
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;
Patches currently in stable-queue which might be from shawnn@xxxxxxxxxxxx are
queue-4.4/platform-chrome-use-proper-protocol-transfer-function.patch