diff options
Diffstat (limited to 'drivers/misc/cros_ec.c')
| -rw-r--r-- | drivers/misc/cros_ec.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/misc/cros_ec.c b/drivers/misc/cros_ec.c index 7b20ffcfa2..5846e76c49 100644 --- a/drivers/misc/cros_ec.c +++ b/drivers/misc/cros_ec.c @@ -154,7 +154,9 @@ static int prepare_proto3_response_buffer(struct cros_ec_dev *dev, int din_len) * @param dev CROS-EC device * @param dinp Returns pointer to response data * @param din_len Maximum size of response in bytes - * @return number of bytes of response data, or <0 if error + * @return number of bytes of response data, or <0 if error. Note that error + * codes can be from errno.h or -ve EC_RES_INVALID_CHECKSUM values (and they + * overlap!) */ static int handle_proto3_response(struct cros_ec_dev *dev, uint8_t **dinp, int din_len) @@ -228,7 +230,7 @@ static int send_command_proto3(struct cros_ec_dev *dev, #ifdef CONFIG_DM_CROS_EC ops = dm_cros_ec_get_ops(dev->dev); - rv = ops->packet(dev->dev, out_bytes, in_bytes); + rv = ops->packet ? ops->packet(dev->dev, out_bytes, in_bytes) : -ENOSYS; #else switch (dev->interface) { #ifdef CONFIG_CROS_EC_SPI @@ -320,7 +322,7 @@ static int send_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, * If not NULL, it will be updated to point to the data * and will always be double word aligned (64-bits) * @param din_len Maximum size of response in bytes - * @return number of bytes in response, or -1 on error + * @return number of bytes in response, or -ve on error */ static int ec_command_inptr(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, const void *dout, int dout_len, uint8_t **dinp, @@ -387,7 +389,7 @@ static int ec_command_inptr(struct cros_ec_dev *dev, uint8_t cmd, * It not NULL, it is a place for ec_command() to copy the * data to. * @param din_len Maximum size of response in bytes - * @return number of bytes in response, or -1 on error + * @return number of bytes in response, or -ve on error */ static int ec_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, const void *dout, int dout_len, |