samsung_sm8750/android_kernel_samsung_sm8750
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

gve: handle overflow when reporting TX consumed descriptors

Browse Source 
commit 15970e1b23f5c25db88c613fddf9131de086f28e upstream.

When the tx tail is less than the head (in cases of wraparound), the TX
consumed descriptor statistic in DQ will be reported as
UINT32_MAX - head + tail, which is incorrect. Mask the difference of
head and tail according to the ring size when reporting the statistic.

Cc: stable@vger.kernel.org
Fixes: 2c9198356d ("gve: Add consumed counts to ethtool stats")
Signed-off-by: Joshua Washington <joshwash@google.com>
Signed-off-by: Harshitha Ramamurthy <hramamurthy@google.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250402001037.2717315-1-hramamurthy@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Joshua Washington
2025-04-02 00:10:37 +00:00
committed by Greg Kroah-Hartman
parent bbc702d73f
commit 504464fd01
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/ethernet/google/gve/gve_ethtool.c
View File

@@ -356,7 +356,9 @@ gve_get_ethtool_stats(struct net_device *netdev,
*/
data[i++] = 0;
data[i++] = 0;
data[i++] = tx->dqo_tx.tail - tx->dqo_tx.head;
data[i++] =
(tx->dqo_tx.tail - tx->dqo_tx.head) &
tx->mask;
}
do {
start =