This is a note to let you know that I've just added the patch titled
ibmvnic: Fix possibly uninitialized old_num_tx_queues variable warning.
to the 5.10-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:
ibmvnic-fix-possibly-uninitialized-old_num_tx_queues-variable-warning.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6881b07fdd24850def1f03761c66042b983ff86e Mon Sep 17 00:00:00 2001
From: Michal Suchanek <msuchanek@xxxxxxx>
Date: Tue, 2 Mar 2021 20:47:47 +0100
Subject: ibmvnic: Fix possibly uninitialized old_num_tx_queues variable warning.
From: Michal Suchanek <msuchanek@xxxxxxx>
commit 6881b07fdd24850def1f03761c66042b983ff86e upstream.
GCC 7.5 reports:
../drivers/net/ethernet/ibm/ibmvnic.c: In function 'ibmvnic_reset_init':
../drivers/net/ethernet/ibm/ibmvnic.c:5373:51: warning: 'old_num_tx_queues' may be used uninitialized in this function [-Wmaybe-uninitialized]
../drivers/net/ethernet/ibm/ibmvnic.c:5373:6: warning: 'old_num_rx_queues' may be used uninitialized in this function [-Wmaybe-uninitialized]
The variable is initialized only if(reset) and used only if(reset &&
something) so this is a false positive. However, there is no reason to
not initialize the variables unconditionally avoiding the warning.
Fixes: 635e442f4a48 ("ibmvnic: merge ibmvnic_reset_init and ibmvnic_init")
Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>
Reviewed-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/ibm/ibmvnic.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -5176,16 +5176,14 @@ static int ibmvnic_reset_init(struct ibm
{
struct device *dev = &adapter->vdev->dev;
unsigned long timeout = msecs_to_jiffies(20000);
- u64 old_num_rx_queues, old_num_tx_queues;
+ u64 old_num_rx_queues = adapter->req_rx_queues;
+ u64 old_num_tx_queues = adapter->req_tx_queues;
int rc;
adapter->from_passive_init = false;
- if (reset) {
- old_num_rx_queues = adapter->req_rx_queues;
- old_num_tx_queues = adapter->req_tx_queues;
+ if (reset)
reinit_completion(&adapter->init_done);
- }
adapter->init_done_rc = 0;
rc = ibmvnic_send_crq_init(adapter);
Patches currently in stable-queue which might be from msuchanek@xxxxxxx are
queue-5.10/ibmvnic-fix-possibly-uninitialized-old_num_tx_queues-variable-warning.patch
