| Message ID | 20190710130638.1846846-1-arnd@arndb.de (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [net-next] net/mlx5e: avoid uninitialized variable use | expand |
On 7/10/2019 4:06 PM, Arnd Bergmann wrote: > clang points to a variable being used in an unexpected > code path: > > drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c:251:2: warning: variable 'rec_seq_sz' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized] > default: > ^~~~~~~ > drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c:255:46: note: uninitialized use occurs here > skip_static_post = !memcmp(rec_seq, &rn_be, rec_seq_sz); > ^~~~~~~~~~ > > From looking at the function logic, it seems that there is no > sensible way to continue here, so just return early and hope > for the best. > > Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support") > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c > index 3f5f4317a22b..5c08891806f0 100644 > --- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c > +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c > @@ -250,6 +250,7 @@ tx_post_resync_params(struct mlx5e_txqsq *sq, > } > default: > WARN_ON(1); > + return; > } > > skip_static_post = !memcmp(rec_seq, &rn_be, rec_seq_sz); > Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Thanks!
On Wed, Jul 10, 2019 at 03:06:25PM +0200, Arnd Bergmann wrote: > clang points to a variable being used in an unexpected > code path: > > drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c:251:2: warning: variable 'rec_seq_sz' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized] > default: > ^~~~~~~ > drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c:255:46: note: uninitialized use occurs here > skip_static_post = !memcmp(rec_seq, &rn_be, rec_seq_sz); > ^~~~~~~~~~ > > From looking at the function logic, it seems that there is no > sensible way to continue here, so just return early and hope > for the best. > > Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support") > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c > index 3f5f4317a22b..5c08891806f0 100644 > --- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c > +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c > @@ -250,6 +250,7 @@ tx_post_resync_params(struct mlx5e_txqsq *sq, > } > default: > WARN_ON(1); > + return; > } > > skip_static_post = !memcmp(rec_seq, &rn_be, rec_seq_sz); > -- > 2.20.0 > Looks like my identical patch got picked up in net-next: https://git.kernel.org/davem/net-next/c/1ff2f0fa450ea4e4f87793d9ed513098ec6e12be Good to know the fix was the same. Cheers, Nathan
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c index 3f5f4317a22b..5c08891806f0 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c @@ -250,6 +250,7 @@ tx_post_resync_params(struct mlx5e_txqsq *sq, } default: WARN_ON(1); + return; } skip_static_post = !memcmp(rec_seq, &rn_be, rec_seq_sz);
clang points to a variable being used in an unexpected code path: drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c:251:2: warning: variable 'rec_seq_sz' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized] default: ^~~~~~~ drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c:255:46: note: uninitialized use occurs here skip_static_post = !memcmp(rec_seq, &rn_be, rec_seq_sz); ^~~~~~~~~~ From looking at the function logic, it seems that there is no sensible way to continue here, so just return early and hope for the best. Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c | 1 + 1 file changed, 1 insertion(+)