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| author |   Jacob Keller <jacob.e.keller@intel.com> | 2017-06-07 05:43:04 -0400 |
|---|---|---|
| committer |   Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2017-06-20 18:17:10 -0700 |
| commit | 15d23b4c361f1449d44249bea127d2bdb981aa01 (patch) | |
| tree | 268a22226b6b4a803a36c96650d4c09df6458095 /drivers/net/ethernet/intel/i40e/i40e_common.c | |
| parent | i40e: use dev_dbg instead of dev_info when warning about missing routine (diff) | |
| download | linux-dev-15d23b4c361f1449d44249bea127d2bdb981aa01.tar.xz linux-dev-15d23b4c361f1449d44249bea127d2bdb981aa01.zip | |
i40e: comment that udp_port must be in host byte order
The firmware expects the port number passed when setting up
the UDP tunnel configuration to be in Little Endian format.
The i40e_aq_add_udp_tunnel command byte swaps the value from
host order to Little Endian.
Since commit fe0b0cd97b4f ("i40e: send correct port number to
AdminQ when enabling UDP tunnels") we've correctly
sent the value in host order.
Let's also add a comment to the function explaining that it must
be in host order, as the port numbers are commonly stored as Big
Endian values.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_common.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c index cbad4eba7ae7..8e082a946411 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_common.c +++ b/drivers/net/ethernet/intel/i40e/i40e_common.c @@ -3614,11 +3614,15 @@ i40e_status i40e_aq_get_cee_dcb_config(struct i40e_hw *hw, /** * i40e_aq_add_udp_tunnel * @hw: pointer to the hw struct - * @udp_port: the UDP port to add + * @udp_port: the UDP port to add in Host byte order * @header_len: length of the tunneling header length in DWords * @protocol_index: protocol index type * @filter_index: pointer to filter index * @cmd_details: pointer to command details structure or NULL + * + * Note: Firmware expects the udp_port value to be in Little Endian format, + * and this function will call cpu_to_le16 to convert from Host byte order to + * Little Endian order. **/ i40e_status i40e_aq_add_udp_tunnel(struct i40e_hw *hw, u16 udp_port, u8 protocol_index, |