Re: [PATCH] wifi: ath11k: fix warning when unbinding

[Rameshkumar Sundaram]

On 4/20/2026 4:31 PM, Jose Ignacio Tornos Martinez wrote:
> If there is an error during some initialization related to firmware,
> the buffers dp->tx_ring[i].tx_status are released.
> However this is released again when the device is unbinded (ath11k_pci),
> and we get:
> WARNING: CPU: 0 PID: 6231 at mm/slub.c:4368 free_large_kmalloc+0x57/0x90
> Call Trace:
> free_large_kmalloc
> ath11k_dp_free
> ath11k_core_deinit
> ath11k_pci_remove
> ...
>
> The issue is always reproducible from a VM because the MSI addressing
> initialization is failing.
>
> In order to fix the issue, just set the buffers to NULL after releasing in
> order to avoid the double free.
>
> Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@xxxxxxxxxx>

Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@xxxxxxxxxxxxxxxx>