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From: Takashi Iwai <tiwai@suse.de>
To: Thorsten Leemhuis <regressions@leemhuis.info>
Cc: Daniel J Blueman <daniel@quora.org>,
	Manivannan Sadhasivam <mani@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Simon Horman <horms@kernel.org>,
	Chris Lew <christopher.lew@oss.qualcomm.com>,
	Pranav Mahesh Phansalkar <pranav.phansalkar@oss.qualcomm.com>,
	Deepak Kumar Singh <deepak.singh@oss.qualcomm.com>,
	linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Linux kernel regressions list <regressions@lists.linux.dev>,
	Takashi Iwai <tiwai@suse.de>
Subject: Re: [PATCH] net: qrtr: resend HELLO on MHI resume
Date: Mon, 14 Sep 2026 11:39:59 +0200	[thread overview]
Message-ID: <877bkop3ww.wl-tiwai@suse.de> (raw)
In-Reply-To: <260eee02-29d3-478f-9a39-d67adfefe862@leemhuis.info>

On Mon, 14 Sep 2026 11:04:25 +0200,
Thorsten Leemhuis wrote:
> 
> On 9/9/26 07:58, 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.
> 
> For the record: Takashi ran into this regression as well and provided a
> different fix, but withdrew it after I pointed out this fix, which
> worked for Takashi. For details see:
> https://lore.kernel.org/all/87mrtkpd2q.wl-tiwai@suse.de/

Yep, feel free to take my tested-by tag, too:

Tested-by: Takashi Iwai <tiwai@suse.de>


thanks,

Takashi

  reply	other threads:[~2026-09-14  9:40 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-09  5:58 Daniel J Blueman
2026-09-11 10:44 ` Manivannan Sadhasivam
2026-09-15 10:48   ` Vlastimil Babka
2026-09-14  9:04 ` Thorsten Leemhuis
2026-09-14  9:39   ` Takashi Iwai [this message]
2026-09-15 10:11   ` Vlastimil Babka
2026-09-15 10:45     ` Vlastimil Babka (SUSE)

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