From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, David Daney <david.daney@cavium.com>,
Jan Glauber <jglauber@cavium.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Alex Williamson <alex.williamson@redhat.com>,
Sasha Levin <alexander.levin@verizon.com>
Subject: [PATCH 3.18 31/38] PCI: Avoid bus reset if bridge itself is broken
Date: Fri, 22 Dec 2017 09:46:44 +0100 [thread overview]
Message-ID: <20171222084453.423843214@linuxfoundation.org> (raw)
In-Reply-To: <20171222084451.623495387@linuxfoundation.org>
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: David Daney <david.daney@cavium.com>
[ Upstream commit 357027786f3523d26f42391aa4c075b8495e5d28 ]
When checking to see if a PCI bus can safely be reset, we previously
checked to see if any of the children had their PCI_DEV_FLAGS_NO_BUS_RESET
flag set. Children marked with that flag are known not to behave well
after a bus reset.
Some PCIe root port bridges also do not behave well after a bus reset,
sometimes causing the devices behind the bridge to become unusable.
Add a check for PCI_DEV_FLAGS_NO_BUS_RESET being set in the bridge device
to allow these bridges to be flagged, and prevent their secondary buses
from being reset.
Signed-off-by: David Daney <david.daney@cavium.com>
[jglauber@cavium.com: fixed typo]
Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/pci/pci.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3580,6 +3580,10 @@ static bool pci_bus_resetable(struct pci
{
struct pci_dev *dev;
+
+ if (bus->self && (bus->self->dev_flags & PCI_DEV_FLAGS_NO_BUS_RESET))
+ return false;
+
list_for_each_entry(dev, &bus->devices, bus_list) {
if (dev->dev_flags & PCI_DEV_FLAGS_NO_BUS_RESET ||
(dev->subordinate && !pci_bus_resetable(dev->subordinate)))
next prev parent reply other threads:[~2017-12-22 8:48 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-22 8:46 [PATCH 3.18 00/38] 3.18.90-stable review Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 01/38] arm64: Initialise high_memory global variable earlier Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 02/38] ALSA: hda - add support for docking station for HP 820 G2 Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 03/38] cpuidle: Validate cpu_dev in cpuidle_add_sysfs() Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 04/38] r8152: fix the list rx_done may be used without initialization Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 05/38] crypto: deadlock between crypto_alg_sem/rtnl_mutex/genl_mutex Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 07/38] usb: gadget: f_uvc: Sanity check wMaxPacketSize for SuperSpeed Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 08/38] usb: gadget: udc: remove pointer dereference after free Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 09/38] netfilter: nfnl_cthelper: fix runtime expectation policy updates Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 10/38] netfilter: nfnl_cthelper: Fix memory leak Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 11/38] scsi: lpfc: Fix PT2PT PRLI reject Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 14/38] hwmon: (asus_atk0110) fix uninitialized data access Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 15/38] i2c: mux: pca954x: Add missing pca9546 definition to chip_desc Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 16/38] HID: xinmo: fix for out of range for THT 2P arcade controller Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 17/38] s390/qeth: no ETH header for outbound AF_IUCV Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 18/38] net: Do not allow negative values for busy_read and busy_poll sysctl interfaces Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 19/38] i40e: Do not enable NAPI on q_vectors that have no rings Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 20/38] irda: vlsi_ir: fix check for DMA mapping errors Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 21/38] netfilter: nfnl_cthelper: fix a race when walk the nf_ct_helper_hash table Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 22/38] netfilter: nf_nat_snmp: Fix panic when snmp_trap_helper fails to register Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 23/38] ARM: dts: am335x-evmsk: adjust mmc2 param to allow suspend Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 24/38] isdn: kcapi: avoid uninitialized data Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 25/38] xhci: plat: Register shutdown for xhci_plat Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 26/38] ARM: dma-mapping: disallow dma_get_sgtable() for non-kernel managed memory Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 27/38] cpuidle: powernv: Pass correct drv->cpumask for registration Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 28/38] backlight: pwm_bl: Fix overflow condition Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 29/38] crypto: crypto4xx - increase context and scatter ring buffer elements Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 30/38] net: phy: at803x: Change error to EINVAL for invalid MAC Greg Kroah-Hartman
2017-12-22 8:46 ` Greg Kroah-Hartman [this message]
2017-12-22 8:46 ` [PATCH 3.18 32/38] scsi: cxgb4i: fix Tx skb leak Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 33/38] PCI: Create SR-IOV virtfn/physfn links before attaching driver Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 34/38] igb: check memory allocation failure Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 35/38] PCI/AER: Report non-fatal errors only to the affected endpoint Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 36/38] scsi: lpfc: Fix secure firmware updates Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 37/38] scsi: lpfc: PLOGI failures during NPIV testing Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 3.18 38/38] fm10k: ensure we process SM mbx when processing VF mbx Greg Kroah-Hartman
2017-12-22 17:53 ` [PATCH 3.18 00/38] 3.18.90-stable review Guenter Roeck
2017-12-23 9:18 ` Greg Kroah-Hartman
2017-12-22 21:12 ` Shuah Khan
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