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([2001:1a48:8:903::e14]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48724593f5asm20453529f8f.28.2026.09.21.00.58.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 21 Sep 2026 00:58:33 -0700 (PDT) Message-ID: <71362ec5-ba7f-411f-b2d8-6913a08be8af@suse.com> Date: Mon, 21 Sep 2026 09:58:32 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] net: qrtr: resend HELLO on MHI resume Content-Language: en-US To: Manivannan Sadhasivam , Daniel J Blueman , netdev@vger.kernel.org Cc: "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 References: <20260909055846.16539-1-daniel@quora.org> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.com; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSFWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmNvbT7CwZcEEwEKAEECGwMFCwkIBwMFFQoJCAsFFgIDAQAC HgECF4ACGQEWIQSpQNQ0mSwujpkQPVAiT6fnzIKmZAUCZ8ga5gUJGtCBUAAKCRAiT6fnzIKm ZLljEACddSH94E+dD+XU0h0o3OgLczf/MeMYW00ZaK5FsnIPbxf/VdQHXd7KcvIFTdpc7X6O 53MlUbUoymNLhhJdEa8EEaH9F9FEGD6fL7DRoE35gxwxSnCGlvffktvD2oeKH0NKPMam1vNu 3Imq5RA5n4Nfw3hMQzmi7JXI8eFyy9h7GVcyjhDnb2WsLGAQIAKSGqlfdmrkEelhaIoTEMQ9 cDIZPGhmDGcdHXuEwRWk5qZGOGoH8AsJz5SXEWe00PB4qyKnhzhkD6c20eFL9qBC/54IVFvS qk1rZGON2NnNQtGwR9i5ghThKo9ALgbS1ha7IsnsyElpnM4Xa5VcFxNTQZlNqWch57lkFihA LATi0USes50huWtgjTMGbaVgud5w5ScGEexVQKc7uGUK6TiCKxmp209VcWqH6NoM3gbekYad XQzw3ykgIgJzTQNPffw56kIwJLOzooglFujThxw3w8+SN8k1znU5X4vpJCkoIB24rGevPTMd f8uf/6lA7o2O1HbDnOAwDIkUdZqurRU1YBHRFf2Me7z/DyMPbkUNcaGFQ/hZopC4ch7j12GM smzuUQ/3WkwHGeuzGHJZqZyVAX+86gXXx16OURuwrfsbWMkDAo9nTVQzl5UsWrCYE/N9dhkl uAge7mIix4uRKlIYHfSA6o7N+cXY16V+zFHlmd6LOM7ATQRbGTU1AQgAn0H6UrFiWcovkh6E XVcl+SeqyO6JHOPm+e9Wu0Vw+VIUvXZVUVVQLa1PQDUi6j00ChlcR66g9/V0sPIcSutacPKf dKYOBvzd4rlhL8rfrdEsQw5ApZxrA8kYZVMhFmBRKAa6wos25moTlMKpCWzTH84+WO5+ziCT sTUZASAToz3RdunTD+vQcHj0GqNTPAHK63sfbAB2I0BslZkXkY1RLb/YhuA6E7JyEd2pilZO rIuBGl/5q2qSakgnAVFWFBR/DO27JuAksYnq+aH8vI0xGvwn75KqSk4UzAkDzWSmO4ZHuahK tQgZNsMYV+PGayRBX9b9zbldzopoLBdqHc4njQARAQABwsF8BBgBCgAmAhsMFiEEqUDUNJks Lo6ZED1QIk+n58yCpmQFAmfIHFQFCRYU6J8ACgkQIk+n58yCpmS2PA//bqN1LfcotmArgEls a+0EGZSQlYgK48pm8WAeTXTngudP9IJ4SuKYHR5RNjHcBeqN+Me0zxRqYzRb8nGanHEkDyf4 Im8DQM8d6vbyU+FcPmG4skud4kgS1zMHnlVdSXfSIwKC/hKgdHG8aBV7545Lz9X6Iohea+94 wneD0aw/hqF+QWewGZhWJriWAZtvEkzNjQOi4U9F/trLten/x7bpphDSnDMKJtITbtzATT1D q7o7VpIUK1nCTQALMuMjKCdi8OdU/+V+R3O40PXWvX8qrvqYapVbZ+9KqT74FsuB0Ya9uXwg BF2Q6cRuETZk5vqaqKxzqoQZCO8AOz/58j6O2RHNy/mZEN+7tJ5Tsq42zVJ4jxsT8b9Yplav CMsnBgDeRWhcbYhCyttoL7nYISyWg4kQYZ/PwIV3OuNv2f8iKYsxNsRuClOAF82+gvqOy1/1 pprFjy8uo2pkoOrb63aOP3vO5VHnRKgra6dqNcaZ+c6J4H+nEJGi2SkHAUJz5oBzuThvPudL vPA/SK8sKoM01IRxSihev/S/5WLazXB1PGemOCbvzC1IjWJJraxiDJ5IygokapUa2RP7+WBR 22skQ3SSl6G107QgWKSyTOGWEaRmV53vxQLVjXuCmzSSasTL60zq5yGrT4/DYQVSNEUiUbG4 pYekxJujNeEDkUlky0Y= In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/18/26 19:05, Manivannan Sadhasivam wrote: > + 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 > > Reviewed-by: Manivannan Sadhasivam > > Since this patch fixes a regression in linux-next, it'd be good to get it merged > asap. Linus merged it directly for rc4 as 6a5719cc3ef2 ("net: qrtr: resend HELLO on MHI resume") > - Mani >