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Mon, 14 Sep 2026 09:39:59 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 2kxiO+/Ap2opZQAAD6G6ig (envelope-from ); Mon, 14 Sep 2026 09:39:59 +0000 Date: Mon, 14 Sep 2026 11:39:59 +0200 Message-ID: <877bkop3ww.wl-tiwai@suse.de> From: Takashi Iwai To: Thorsten Leemhuis Cc: Daniel J Blueman , Manivannan Sadhasivam , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Chris Lew , Pranav Mahesh Phansalkar , Deepak Kumar Singh , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Linux kernel regressions list , Takashi Iwai Subject: Re: [PATCH] net: qrtr: resend HELLO on MHI resume In-Reply-To: <260eee02-29d3-478f-9a39-d67adfefe862@leemhuis.info> References: <20260909055846.16539-1-daniel@quora.org> <260eee02-29d3-478f-9a39-d67adfefe862@leemhuis.info> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Spam-Score: -3.30 X-Spam-Level: X-Spamd-Result: default: False [-3.30 / 50.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-0.993]; MIME_GOOD(-0.10)[text/plain]; URIBL_BLOCKED(0.00)[suse.de:mid,suse.de:email,imap1.dmz-prg2.suse.org:helo]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; ARC_NA(0.00)[]; RCPT_COUNT_TWELVE(0.00)[15]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:mid,suse.de:email] X-Spam-Flag: NO 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 thanks, Takashi