[Intel-wired-lan] [PATCH v2 1/4] Revert "igb: Disable threaded IRQ for igb_msix_other"
Przemek Kitszel
przemyslaw.kitszel at intel.com
Fri Nov 8 12:20:28 UTC 2024
On 11/6/24 12:14, Wander Lairson Costa wrote:
> This reverts commit 338c4d3902feb5be49bfda530a72c7ab860e2c9f.
>
> Sebastian noticed the ISR indirectly acquires spin_locks, which are
> sleeping locks under PREEMPT_RT, which leads to kernel splats.
I don't like to slow things down, but it would be great to have a Link:
to the report, and the (minified) splat attached.
>
> Fixes: 338c4d3902feb ("igb: Disable threaded IRQ for igb_msix_other")
> Reported-by: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
> Signed-off-by: Wander Lairson Costa <wander at redhat.com>
>
> ---
>
> Changelog:
>
> v2: Add the Fixes tag
> Signed-off-by: Wander Lairson Costa <wander at redhat.com>
> ---
> drivers/net/ethernet/intel/igb/igb_main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
> index b83df5f94b1f5..f1d0881687233 100644
> --- a/drivers/net/ethernet/intel/igb/igb_main.c
> +++ b/drivers/net/ethernet/intel/igb/igb_main.c
> @@ -907,7 +907,7 @@ static int igb_request_msix(struct igb_adapter *adapter)
> int i, err = 0, vector = 0, free_vector = 0;
>
> err = request_irq(adapter->msix_entries[vector].vector,
> - igb_msix_other, IRQF_NO_THREAD, netdev->name, adapter);
> + igb_msix_other, 0, netdev->name, adapter);
> if (err)
> goto err_out;
>
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