提交 9e4d6909 编写于 作者: M Marc Kleine-Budde

can: janz-ican3: cleanup of ican3_to_can_frame and can_frame_to_ican3

This patch cleans up the ICAN3 to Linux CAN frame and vice versa
conversion functions:

- RX: Use get_can_dlc() to limit the dlc value.
- RX+TX: Don't copy the whole frame, only copy the amount of bytes
  specified in cf->can_dlc.
Acked-by: NIra W. Snyder <iws@ovro.caltech.edu>
Tested-by: NIra W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
上级 007890d7
......@@ -811,10 +811,10 @@ static void ican3_to_can_frame(struct ican3_dev *mod,
cf->can_id |= desc->data[0] << 3;
cf->can_id |= (desc->data[1] & 0xe0) >> 5;
cf->can_dlc = desc->data[1] & ICAN3_CAN_DLC_MASK;
memcpy(cf->data, &desc->data[2], sizeof(cf->data));
cf->can_dlc = get_can_dlc(desc->data[1] & ICAN3_CAN_DLC_MASK);
memcpy(cf->data, &desc->data[2], cf->can_dlc);
} else {
cf->can_dlc = desc->data[0] & ICAN3_CAN_DLC_MASK;
cf->can_dlc = get_can_dlc(desc->data[0] & ICAN3_CAN_DLC_MASK);
if (desc->data[0] & ICAN3_EFF_RTR)
cf->can_id |= CAN_RTR_FLAG;
......@@ -829,7 +829,7 @@ static void ican3_to_can_frame(struct ican3_dev *mod,
cf->can_id |= desc->data[3] >> 5; /* 2-0 */
}
memcpy(cf->data, &desc->data[6], sizeof(cf->data));
memcpy(cf->data, &desc->data[6], cf->can_dlc);
}
}
......@@ -861,7 +861,7 @@ static void can_frame_to_ican3(struct ican3_dev *mod,
}
/* copy the data bits into the descriptor */
memcpy(&desc->data[6], cf->data, sizeof(cf->data));
memcpy(&desc->data[6], cf->data, cf->can_dlc);
}
/*
......
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