[PATCH V5 1/2] can: m_can: fix not set can_dlc for remote frame
From: Dong Aisheng <hidden>
Date: 2014-11-18 11:00:54
Also in:
linux-arm-kernel, netdev
Subsystem:
can network drivers, mcan device driver, the rest · Maintainers:
Marc Kleine-Budde, Vincent Mailhol, Markus Schneider-Pargmann, Linus Torvalds
The original code missed to set the cf->can_dlc in the RTR case, so add it. Signed-off-by: Dong Aisheng <redacted> --- drivers/net/can/m_can/m_can.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 06541f1..2f61676 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c@@ -331,7 +331,7 @@ static void m_can_read_fifo(const struct net_device *dev, struct can_frame *cf, u32 rxfs) { struct m_can_priv *priv = netdev_priv(dev); - u32 id, fgi; + u32 id, fgi, dlc; /* calculate the fifo get index for where to read data */ fgi = (rxfs & RXFS_FGI_MASK) >> RXFS_FGI_OFF;
@@ -341,11 +341,12 @@ static void m_can_read_fifo(const struct net_device *dev, struct can_frame *cf, else cf->can_id = (id >> 18) & CAN_SFF_MASK; + dlc = m_can_fifo_read(priv, fgi, M_CAN_FIFO_DLC); + cf->can_dlc = get_can_dlc((dlc >> 16) & 0x0F); + if (id & RX_BUF_RTR) { cf->can_id |= CAN_RTR_FLAG; } else { - id = m_can_fifo_read(priv, fgi, M_CAN_FIFO_DLC); - cf->can_dlc = get_can_dlc((id >> 16) & 0x0F); *(u32 *)(cf->data + 0) = m_can_fifo_read(priv, fgi, M_CAN_FIFO_DATA(0)); *(u32 *)(cf->data + 4) = m_can_fifo_read(priv, fgi,
--
1.9.1