linux-kernel - [PATCH 5/8] pci: Add reset_slot option to pci_dev

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130507232447.24653.68433.stgit@bling.home>
Date:	Tue, 07 May 2013 17:24:47 -0600
From:	Alex Williamson <alex.williamson@...hat.com>
To:	bhelgaas@...gle.com
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 5/8] pci: Add reset_slot option to pci_dev_reset

If the hotplug controller provides a way to reset a slot, use that
before a direct parent bus reset.

Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
---
 drivers/pci/pci.c |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index d0f313f..f5035f5 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -22,6 +22,7 @@
 #include <linux/interrupt.h>
 #include <linux/device.h>
 #include <linux/pm_runtime.h>
+#include <linux/pci_hotplug.h>
 #include <asm-generic/pci-bridge.h>
 #include <asm/setup.h>
 #include "pci.h"
@@ -3251,6 +3252,20 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
 	return 0;
 }
 
+static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe)
+{
+	struct pci_dev *pdev;
+
+	if (dev->subordinate || !dev->slot)
+		return -ENOTTY;
+
+	list_for_each_entry(pdev, &dev->bus->devices, bus_list)
+		if (pdev != dev && pdev->slot == dev->slot)
+			return -ENOTTY;
+
+	return pci_hp_reset_slot(dev->slot->hotplug, probe);
+}
+
 static int __pci_dev_reset(struct pci_dev *dev, int probe)
 {
 	int rc;
@@ -3273,6 +3288,10 @@ static int __pci_dev_reset(struct pci_dev *dev, int probe)
 	if (rc != -ENOTTY)
 		goto done;
 
+	rc = pci_dev_reset_slot_function(dev, probe);
+	if (rc != -ENOTTY)
+		goto done;
+
 	rc = pci_parent_bus_reset(dev, probe);
 done:
 	return rc;

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/