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[146.241.15.169]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-436e9e62116sm166347825e9.35.2025.01.14.00.49.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Jan 2025 00:49:56 -0800 (PST) Message-ID: <44a21765-1283-4e79-b24a-fb672399250d@redhat.com> Date: Tue, 14 Jan 2025 09:49:55 +0100 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] net: wwan: iosm: Fix hibernation by re-binding the driver around it To: "Maciej S. Szmigiero" , M Chetan Kumar , Loic Poulain , Sergey Ryazanov , Johannes Berg , Bjorn Helgaas Cc: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , "Rafael J . Wysocki" , netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org References: Content-Language: en-US From: Paolo Abeni In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 1/9/25 12:33 AM, Maciej S. Szmigiero wrote: @@ -530,3 +531,56 @@ void ipc_pcie_kfree_skb(struct iosm_pcie *ipc_pcie, struct sk_buff *skb) > IPC_CB(skb)->mapping = 0; > dev_kfree_skb(skb); > } > + > +static int pm_notify(struct notifier_block *nb, unsigned long mode, void *_unused) > +{ > + if (mode == PM_HIBERNATION_PREPARE || mode == PM_RESTORE_PREPARE) { > + if (pci_registered) { Out of sheer ignorance on my side, why 'mode == PM_RESTORE_PREPARE' is required above? Isn't the driver already unregistered by the previous PM_HIBERNATION_PREPARE call? Thanks, Paolo