Messages in this thread Patch in this message | | | From | Tzung-Bi Shih <> | Subject | [PATCH v4 21/21] platform/chrome: cros_ec_proto: handle empty payload in getting wake mask | Date | Thu, 9 Jun 2022 08:49:57 +0000 |
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cros_ec_get_host_event_wake_mask() expects to receive sizeof(struct ec_response_host_event_mask) from send_command(). The payload is valid only if the return value is positive.
Return -EPROTO if send_command() returns 0 in cros_ec_get_host_event_wake_mask().
Reviewed-by: Guenter Roeck <groeck@chromium.org> Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org> --- Changes from v3: - Add R-b tag.
drivers/platform/chrome/cros_ec_proto.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-)
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index 760a6da0965a..ef942e8d0e8f 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -256,19 +256,23 @@ static int cros_ec_get_host_event_wake_mask(struct cros_ec_device *ec_dev, uint3 msg->insize = sizeof(*r); ret = send_command(ec_dev, msg); - if (ret >= 0) { - mapped = cros_ec_map_error(msg->result); - if (mapped) { - ret = mapped; - goto exit; - } + if (ret < 0) + goto exit; + + mapped = cros_ec_map_error(msg->result); + if (mapped) { + ret = mapped; + goto exit; } - if (ret > 0) { - r = (struct ec_response_host_event_mask *)msg->data; - *mask = r->mask; - ret = 0; + + if (ret == 0) { + ret = -EPROTO; + goto exit; } + r = (struct ec_response_host_event_mask *)msg->data; + *mask = r->mask; + ret = 0; exit: kfree(msg); return ret; -- 2.36.1.255.ge46751e96f-goog
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