flow->irq is initialized to 0 which is a valid IRQ. Set it to -EINVAL
in error path of am65_cpsw_nuss_init_rx_chns() so we do not try
to free an unallocated IRQ in am65_cpsw_nuss_remove_rx_chns().
If user tried to change number of RX queues and am65_cpsw_nuss_init_rx_chns()
failed due to any reason, the warning will happen if user tries to change
the number of RX queues after the error condition.
root@am62xx-evm:~# ethtool -L eth0 rx 3
[ 40.385293] am65-cpsw-nuss 8000000.ethernet: set new flow-id-base 19
[ 40.393211] am65-cpsw-nuss 8000000.ethernet: Failed to init rx flow2
netlink error: Invalid argument
root@am62xx-evm:~# ethtool -L eth0 rx 2
[ 82.306427] ------------[ cut here ]------------
[ 82.311075] WARNING: CPU: 0 PID: 378 at kernel/irq/devres.c:144 devm_free_irq+0x84/0x90
[ 82.469770] Call trace:
[ 82.472208] devm_free_irq+0x84/0x90
[ 82.475777] am65_cpsw_nuss_remove_rx_chns+0x6c/0xac [ti_am65_cpsw_nuss]
[ 82.482487] am65_cpsw_nuss_update_tx_rx_chns+0x2c/0x9c [ti_am65_cpsw_nuss]
[ 82.489442] am65_cpsw_set_channels+0x30/0x4c [ti_am65_cpsw_nuss]
[ 82.495531] ethnl_set_channels+0x224/0x2dc
[ 82.499713] ethnl_default_set_doit+0xb8/0x1b8
[ 82.504149] genl_family_rcv_msg_doit+0xc0/0x124
[ 82.508757] genl_rcv_msg+0x1f0/0x284
[ 82.512409] netlink_rcv_skb+0x58/0x130
[ 82.516239] genl_rcv+0x38/0x50
[ 82.519374] netlink_unicast+0x1d0/0x2b0
[ 82.523289] netlink_sendmsg+0x180/0x3c4
[ 82.527205] __sys_sendto+0xe4/0x158
[ 82.530779] __arm64_sys_sendto+0x28/0x38
[ 82.534782] invoke_syscall+0x44/0x100
[ 82.538526] el0_svc_common.constprop.0+0xc0/0xe0
[ 82.543221] do_el0_svc+0x1c/0x28
[ 82.546528] el0_svc+0x28/0x98
[ 82.549578] el0t_64_sync_handler+0xc0/0xc4
[ 82.553752] el0t_64_sync+0x190/0x194
[ 82.557407] ---[ end trace 0000000000000000 ]---
Fixes: da70d184a8c3 ("net: ethernet: ti: am65-cpsw: Introduce multi queue Rx")
Signed-off-by: Roger Quadros <rogerq@kernel.org>
---
drivers/net/ethernet/ti/am65-cpsw-nuss.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 70aea654c79f..ba6db61dd227 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -2441,6 +2441,7 @@ static int am65_cpsw_nuss_init_rx_chns(struct am65_cpsw_common *common)
flow = &rx_chn->flows[i];
flow->id = i;
flow->common = common;
+ flow->irq = -EINVAL;
rx_flow_cfg.ring_rxfdq0_id = fdqring_id;
rx_flow_cfg.rx_cfg.size = max_desc_num;
@@ -2483,6 +2484,7 @@ static int am65_cpsw_nuss_init_rx_chns(struct am65_cpsw_common *common)
if (ret) {
dev_err(dev, "failure requesting rx %d irq %u, %d\n",
i, flow->irq, ret);
+ flow->irq = -EINVAL;
goto err;
}
}
--
2.34.1On Fri, Nov 01, 2024 at 12:18:51PM +0200, Roger Quadros wrote:
> flow->irq is initialized to 0 which is a valid IRQ. Set it to -EINVAL
> in error path of am65_cpsw_nuss_init_rx_chns() so we do not try
> to free an unallocated IRQ in am65_cpsw_nuss_remove_rx_chns().
>
> If user tried to change number of RX queues and am65_cpsw_nuss_init_rx_chns()
> failed due to any reason, the warning will happen if user tries to change
> the number of RX queues after the error condition.
>
> root@am62xx-evm:~# ethtool -L eth0 rx 3
> [ 40.385293] am65-cpsw-nuss 8000000.ethernet: set new flow-id-base 19
> [ 40.393211] am65-cpsw-nuss 8000000.ethernet: Failed to init rx flow2
> netlink error: Invalid argument
> root@am62xx-evm:~# ethtool -L eth0 rx 2
> [ 82.306427] ------------[ cut here ]------------
> [ 82.311075] WARNING: CPU: 0 PID: 378 at kernel/irq/devres.c:144 devm_free_irq+0x84/0x90
> [ 82.469770] Call trace:
> [ 82.472208] devm_free_irq+0x84/0x90
> [ 82.475777] am65_cpsw_nuss_remove_rx_chns+0x6c/0xac [ti_am65_cpsw_nuss]
> [ 82.482487] am65_cpsw_nuss_update_tx_rx_chns+0x2c/0x9c [ti_am65_cpsw_nuss]
> [ 82.489442] am65_cpsw_set_channels+0x30/0x4c [ti_am65_cpsw_nuss]
> [ 82.495531] ethnl_set_channels+0x224/0x2dc
> [ 82.499713] ethnl_default_set_doit+0xb8/0x1b8
> [ 82.504149] genl_family_rcv_msg_doit+0xc0/0x124
> [ 82.508757] genl_rcv_msg+0x1f0/0x284
> [ 82.512409] netlink_rcv_skb+0x58/0x130
> [ 82.516239] genl_rcv+0x38/0x50
> [ 82.519374] netlink_unicast+0x1d0/0x2b0
> [ 82.523289] netlink_sendmsg+0x180/0x3c4
> [ 82.527205] __sys_sendto+0xe4/0x158
> [ 82.530779] __arm64_sys_sendto+0x28/0x38
> [ 82.534782] invoke_syscall+0x44/0x100
> [ 82.538526] el0_svc_common.constprop.0+0xc0/0xe0
> [ 82.543221] do_el0_svc+0x1c/0x28
> [ 82.546528] el0_svc+0x28/0x98
> [ 82.549578] el0t_64_sync_handler+0xc0/0xc4
> [ 82.553752] el0t_64_sync+0x190/0x194
> [ 82.557407] ---[ end trace 0000000000000000 ]---
>
> Fixes: da70d184a8c3 ("net: ethernet: ti: am65-cpsw: Introduce multi queue Rx")
Hi Roger,
I wonder if the problem predates the cited commit and was, rather,
introduced by:
Fixes: 24bc19b05f1f ("net: ethernet: ti: am65-cpsw: Add suspend/resume support")
...
Hi Simon,
On 05/11/2024 15:30, Simon Horman wrote:
> On Fri, Nov 01, 2024 at 12:18:51PM +0200, Roger Quadros wrote:
>> flow->irq is initialized to 0 which is a valid IRQ. Set it to -EINVAL
>> in error path of am65_cpsw_nuss_init_rx_chns() so we do not try
>> to free an unallocated IRQ in am65_cpsw_nuss_remove_rx_chns().
>>
>> If user tried to change number of RX queues and am65_cpsw_nuss_init_rx_chns()
>> failed due to any reason, the warning will happen if user tries to change
>> the number of RX queues after the error condition.
>>
>> root@am62xx-evm:~# ethtool -L eth0 rx 3
>> [ 40.385293] am65-cpsw-nuss 8000000.ethernet: set new flow-id-base 19
>> [ 40.393211] am65-cpsw-nuss 8000000.ethernet: Failed to init rx flow2
>> netlink error: Invalid argument
>> root@am62xx-evm:~# ethtool -L eth0 rx 2
>> [ 82.306427] ------------[ cut here ]------------yes.
>> [ 82.311075] WARNING: CPU: 0 PID: 378 at kernel/irq/devres.c:144 devm_free_irq+0x84/0x90
>> [ 82.469770] Call trace:
>> [ 82.472208] devm_free_irq+0x84/0x90
>> [ 82.475777] am65_cpsw_nuss_remove_rx_chns+0x6c/0xac [ti_am65_cpsw_nuss]
>> [ 82.482487] am65_cpsw_nuss_update_tx_rx_chns+0x2c/0x9c [ti_am65_cpsw_nuss]
>> [ 82.489442] am65_cpsw_set_channels+0x30/0x4c [ti_am65_cpsw_nuss]
>> [ 82.495531] ethnl_set_channels+0x224/0x2dc
>> [ 82.499713] ethnl_default_set_doit+0xb8/0x1b8
>> [ 82.504149] genl_family_rcv_msg_doit+0xc0/0x124
>> [ 82.508757] genl_rcv_msg+0x1f0/0x284
>> [ 82.512409] netlink_rcv_skb+0x58/0x130
>> [ 82.516239] genl_rcv+0x38/0x50
>> [ 82.519374] netlink_unicast+0x1d0/0x2b0
>> [ 82.523289] netlink_sendmsg+0x180/0x3c4
>> [ 82.527205] __sys_sendto+0xe4/0x158
>> [ 82.530779] __arm64_sys_sendto+0x28/0x38
>> [ 82.534782] invoke_syscall+0x44/0x100
>> [ 82.538526] el0_svc_common.constprop.0+0xc0/0xe0
>> [ 82.543221] do_el0_svc+0x1c/0x28
>> [ 82.546528] el0_svc+0x28/0x98
>> [ 82.549578] el0t_64_sync_handler+0xc0/0xc4
>> [ 82.553752] el0t_64_sync+0x190/0x194
>> [ 82.557407] ---[ end trace 0000000000000000 ]---
>>
>> Fixes: da70d184a8c3 ("net: ethernet: ti: am65-cpsw: Introduce multi queue Rx")
>
> Hi Roger,
>
> I wonder if the problem predates the cited commit and was, rather,
> introduced by:
>
> Fixes: 24bc19b05f1f ("net: ethernet: ti: am65-cpsw: Add suspend/resume support")
Partly yes. But at that commit AM65_CPSW_MAX_RX_FLOWS is 1 so there is no
opportunity for user to change the number of RX queues.
--
cheers,
-roger
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