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| author | Shawn Nematbakhsh <shawnn@chromium.org> | 2017-09-08 13:50:11 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-24 11:01:23 +0100 |
| commit | f4a0f85594baa84dfddfa36ae857fccb8f2606df (patch) | |
| tree | 1052fa191a5000cae1b9b71f261c94d69378f254 /drivers/platform | |
| parent | 71233e2541a4f8fcbce05f76679a0a380b3159ad (diff) | |
| download | linux-stable-f4a0f85594baa84dfddfa36ae857fccb8f2606df.tar.gz linux-stable-f4a0f85594baa84dfddfa36ae857fccb8f2606df.tar.bz2 linux-stable-f4a0f85594baa84dfddfa36ae857fccb8f2606df.zip | |
platform/chrome: Use proper protocol transfer function
[ 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>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_proto.c | 8 |
1 files 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; |