summaryrefslogtreecommitdiff
path: root/drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c')
-rw-r--r--drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c
index f732556d233a..d3ac865933fd 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c
@@ -16,9 +16,9 @@
#include "mcp251xfd.h"
-static inline bool mcp251xfd_tx_fifo_sta_full(u32 fifo_sta)
+static inline bool mcp251xfd_tx_fifo_sta_empty(u32 fifo_sta)
{
- return !(fifo_sta & MCP251XFD_REG_FIFOSTA_TFNRFNIF);
+ return fifo_sta & MCP251XFD_REG_FIFOSTA_TFERFFIF;
}
static inline int
@@ -122,7 +122,11 @@ mcp251xfd_get_tef_len(struct mcp251xfd_priv *priv, u8 *len_p)
if (err)
return err;
- if (mcp251xfd_tx_fifo_sta_full(fifo_sta)) {
+ /* If the chip says the TX-FIFO is empty, but there are no TX
+ * buffers free in the ring, we assume all have been sent.
+ */
+ if (mcp251xfd_tx_fifo_sta_empty(fifo_sta) &&
+ mcp251xfd_get_tx_free(tx_ring) == 0) {
*len_p = tx_ring->obj_num;
return 0;
}