[PATCH v1 03/11] PCI/PM: Set current_state to D3cold if the device is not accessible

From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux PCI <linux-pci@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Linux PM <linux-pm@vger.kernel.org>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Bjorn Helgaas <helgaas@kernel.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Anders Roxell <anders.roxell@linaro.org>
Subject: [PATCH v1 03/11] PCI/PM: Set current_state to D3cold if the device is not accessible
Date: Thu, 05 May 2022 20:04:07 +0200	[thread overview]
Message-ID: <10104376.nUPlyArG6x@kreacher> (raw)
In-Reply-To: <4738492.GXAFRqVoOG@kreacher>

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Make pci_power_up() and pci_set_low_power_state() change current_state
to PCI_D3cold when the device is not accessible along the lines of
pci_update_current_state().

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/pci/pci.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-pm/drivers/pci/pci.c
===================================================================

--- linux-pm.orig/drivers/pci/pci.c
+++ linux-pm/drivers/pci/pci.c
@@ -1207,6 +1207,7 @@ int pci_power_up(struct pci_dev *dev)
 	if (PCI_POSSIBLE_ERROR(pmcsr)) {
 		pci_err(dev, "Unable to change power state from %s to D0, device inaccessible\n",
 			pci_power_name(dev->current_state));
+		dev->current_state = PCI_D3cold;
 		return -EIO;
 	}
 
@@ -1335,6 +1336,7 @@ static int pci_set_low_power_state(struc
 		pci_err(dev, "Unable to change power state from %s to %s, device inaccessible\n",
 			pci_power_name(dev->current_state),
 			pci_power_name(state));
+		dev->current_state = PCI_D3cold;
 		return -EIO;
 	}
 



