Patch "net: ena: Destroy correct number of xdp queues upon failure" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    net: ena: Destroy correct number of xdp queues upon failure

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-ena-destroy-correct-number-of-xdp-queues-upon-fa.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 274d8893ee8490708358cb255ce0bbbcca6b8ee5
Author: David Arinzon <darinzon@xxxxxxxxxx>
Date:   Mon Dec 11 06:27:58 2023 +0000

    net: ena: Destroy correct number of xdp queues upon failure
    
    [ Upstream commit 41db6f99b5489a0d2ef26afe816ef0c6118d1d47 ]
    
    The ena_setup_and_create_all_xdp_queues() function freed all the
    resources upon failure, after creating only xdp_num_queues queues,
    instead of freeing just the created ones.
    
    In this patch, the only resources that are freed, are the ones
    allocated right before the failure occurs.
    
    Fixes: 548c4940b9f1 ("net: ena: Implement XDP_TX action")
    Signed-off-by: Shahar Itzko <itzko@xxxxxxxxxx>
    Signed-off-by: David Arinzon <darinzon@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20231211062801.27891-2-darinzon@xxxxxxxxxx
    Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 08f4c7f661214..da83580a11391 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -74,6 +74,8 @@ static void ena_unmap_tx_buff(struct ena_ring *tx_ring,
 			      struct ena_tx_buffer *tx_info);
 static int ena_create_io_tx_queues_in_range(struct ena_adapter *adapter,
 					    int first_index, int count);
+static void ena_free_all_io_tx_resources_in_range(struct ena_adapter *adapter,
+						  int first_index, int count);
 
 /* Increase a stat by cnt while holding syncp seqlock on 32bit machines */
 static void ena_increase_stat(u64 *statp, u64 cnt,
@@ -459,23 +461,22 @@ static void ena_init_all_xdp_queues(struct ena_adapter *adapter)
 
 static int ena_setup_and_create_all_xdp_queues(struct ena_adapter *adapter)
 {
+	u32 xdp_first_ring = adapter->xdp_first_ring;
+	u32 xdp_num_queues = adapter->xdp_num_queues;
 	int rc = 0;
 
-	rc = ena_setup_tx_resources_in_range(adapter, adapter->xdp_first_ring,
-					     adapter->xdp_num_queues);
+	rc = ena_setup_tx_resources_in_range(adapter, xdp_first_ring, xdp_num_queues);
 	if (rc)
 		goto setup_err;
 
-	rc = ena_create_io_tx_queues_in_range(adapter,
-					      adapter->xdp_first_ring,
-					      adapter->xdp_num_queues);
+	rc = ena_create_io_tx_queues_in_range(adapter, xdp_first_ring, xdp_num_queues);
 	if (rc)
 		goto create_err;
 
 	return 0;
 
 create_err:
-	ena_free_all_io_tx_resources(adapter);
+	ena_free_all_io_tx_resources_in_range(adapter, xdp_first_ring, xdp_num_queues);
 setup_err:
 	return rc;
 }