diff options
Diffstat (limited to 'drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c')
| -rw-r--r-- | drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c index 9657dbf251b0..8126f88d57d7 100644 --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c @@ -207,9 +207,9 @@ mcp251xfd_ring_init_rx(struct mcp251xfd_priv *priv, u16 *base, u8 *fifo_nr) } } -void mcp251xfd_ring_init(struct mcp251xfd_priv *priv) +int mcp251xfd_ring_init(struct mcp251xfd_priv *priv) { - u16 base = 0; + u16 base = 0, ram_used; u8 fifo_nr = 1; netdev_reset_queue(priv->ndev); @@ -217,6 +217,16 @@ void mcp251xfd_ring_init(struct mcp251xfd_priv *priv) mcp251xfd_ring_init_tef(priv, &base); mcp251xfd_ring_init_rx(priv, &base, &fifo_nr); mcp251xfd_ring_init_tx(priv, &base, &fifo_nr); + + ram_used = base - MCP251XFD_RAM_START; + if (ram_used > MCP251XFD_RAM_SIZE) { + netdev_err(priv->ndev, + "Error during ring configuration, using more RAM (%u bytes) than available (%u bytes).\n", + ram_used, MCP251XFD_RAM_SIZE); + return -ENOMEM; + } + + return 0; } void mcp251xfd_ring_free(struct mcp251xfd_priv *priv) |