4.9-stable review patch. If anyone has any objections, please let me know.
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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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -60,12 +60,14 @@ 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; @@ -88,7 +90,7 @@ 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;