Re: [PATCH] net: qrtr: resend HELLO on MHI resume

[Manivannan Sadhasivam]

+ netdev

On Wed, Sep 09, 2026 at 01:58:44PM +0800, Daniel J Blueman wrote:
> Since the MHI HELLO exchange was relocated, it is sent only at device
> registration. During a suspend-resume cycle, the firmware in WiFi
> cards such as WCN7850 indefinitely waits for another HELLO,
> triggering:
> 
>   ath12k_wifi7_pci 0004:01:00.0: timeout while waiting for restart complete
>   ath12k_wifi7_pci 0004:01:00.0: failed to resume core: -110
> 
> Fix this by triggering the handshake from resume_early in the MHI
> transport.
> 
> Validated on Qualcomm X1E-801800 on Lenovo Slim 7x across 10
> suspend-resume cycles.
> 
> Fixes: 544d85de4dc2 ("net: qrtr: Send HELLO message on endpoint register")
> Signed-off-by: Daniel J Blueman <daniel@xxxxxxxxx>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>

Since this patch fixes a regression in linux-next, it'd be good to get it merged
asap.

- Mani

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