From ec513489933528e179bc6f98d47e6ea86c271a22 Mon Sep 17 00:00:00 2001 From: Tzung-Bi Shih Date: Thu, 9 Jun 2022 08:49:52 +0000 Subject: [PATCH] platform/chrome: cros_ec_proto: check `msg->result` in getting cmd mask cros_ec_get_host_command_version_mask() should check if EC wasn't happy by checking `msg->result`. Use cros_ec_map_error() and return the error code if any. Reviewed-by: Guenter Roeck Signed-off-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20220609084957.3684698-17-tzungbi@kernel.org --- drivers/platform/chrome/cros_ec_proto.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index 1df22eb..b152f29 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -428,13 +428,12 @@ exit: * the caller has ec_dev->lock mutex or the caller knows there is * no other command in progress. */ -static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev, - u16 cmd, u32 *mask) +static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev, u16 cmd, u32 *mask) { struct ec_params_get_cmd_versions *pver; struct ec_response_get_cmd_versions *rver; struct cros_ec_command *msg; - int ret; + int ret, mapped; msg = kmalloc(sizeof(*msg) + max(sizeof(*rver), sizeof(*pver)), GFP_KERNEL); @@ -450,14 +449,20 @@ static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev, pver->cmd = cmd; ret = send_command(ec_dev, msg); - if (ret > 0) { - rver = (struct ec_response_get_cmd_versions *)msg->data; - *mask = rver->version_mask; - ret = 0; + if (ret < 0) + goto exit; + + mapped = cros_ec_map_error(msg->result); + if (mapped) { + ret = mapped; + goto exit; } + rver = (struct ec_response_get_cmd_versions *)msg->data; + *mask = rver->version_mask; + ret = 0; +exit: kfree(msg); - return ret; } -- 2.7.4