[dpdk-dev] [PATCH] net/mlx5: fix an uninitialised variable

Thomas Monjalon thomas.monjalon at 6wind.com
Thu Apr 6 13:06:30 CEST 2017

2017-04-06 11:16, Nelio Laranjeiro:
> Since patch "mbuf: structure reorganization" the compiler complains
>  .../drivers/net/mlx5/mlx5_rxtx.c: In function ‘mlx5_rx_burst’:
>  .../drivers/net/mlx5/mlx5_rxtx.c:2082:17: error: ‘len’ may be used
> uninitialized in this function [-Werror=maybe-uninitialized]
> len is not initialised as it will be at the first segment of a received
> packet, but it remains hard for the compiler to determine it.
> Fixes: 9964b965ad69 ("net/mlx5: re-add Rx scatter support")
> Cc: stable at dpdk.org
> Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro at 6wind.com>
> Acked-by: Olivier Matz <olivier.matz at 6wind.com>

Applied, thanks

It is important to note that we see this error only after the mbuf rework
of 17.05, only with GCC, and only when debug is enabled.

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