+++ /dev/null
-From 23584c1ed3e15a6f4bfab8dc5a88d94ab929ee12 Mon Sep 17 00:00:00 2001
-From: Lukas Wunner <lukas@wunner.de>
-Date: Wed, 17 Nov 2021 23:22:09 +0100
-Subject: PCI: pciehp: Fix infinite loop in IRQ handler upon power fault
-
-From: Lukas Wunner <lukas@wunner.de>
-
-commit 23584c1ed3e15a6f4bfab8dc5a88d94ab929ee12 upstream.
-
-The Power Fault Detected bit in the Slot Status register differs from
-all other hotplug events in that it is sticky: It can only be cleared
-after turning off slot power. Per PCIe r5.0, sec. 6.7.1.8:
-
- If a power controller detects a main power fault on the hot-plug slot,
- it must automatically set its internal main power fault latch [...].
- The main power fault latch is cleared when software turns off power to
- the hot-plug slot.
-
-The stickiness used to cause interrupt storms and infinite loops which
-were fixed in 2009 by commits 5651c48cfafe ("PCI pciehp: fix power fault
-interrupt storm problem") and 99f0169c17f3 ("PCI: pciehp: enable
-software notification on empty slots").
-
-Unfortunately in 2020 the infinite loop issue was inadvertently
-reintroduced by commit 8edf5332c393 ("PCI: pciehp: Fix MSI interrupt
-race"): The hardirq handler pciehp_isr() clears the PFD bit until
-pciehp's power_fault_detected flag is set. That happens in the IRQ
-thread pciehp_ist(), which never learns of the event because the hardirq
-handler is stuck in an infinite loop. Fix by setting the
-power_fault_detected flag already in the hardirq handler.
-
-Link: https://bugzilla.kernel.org/show_bug.cgi?id=214989
-Link: https://lore.kernel.org/linux-pci/DM8PR11MB5702255A6A92F735D90A4446868B9@DM8PR11MB5702.namprd11.prod.outlook.com
-Fixes: 8edf5332c393 ("PCI: pciehp: Fix MSI interrupt race")
-Link: https://lore.kernel.org/r/66eaeef31d4997ceea357ad93259f290ededecfd.1637187226.git.lukas@wunner.de
-Reported-by: Joseph Bao <joseph.bao@intel.com>
-Tested-by: Joseph Bao <joseph.bao@intel.com>
-Signed-off-by: Lukas Wunner <lukas@wunner.de>
-Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
-Cc: stable@vger.kernel.org # v4.19+
-Cc: Stuart Hayes <stuart.w.hayes@gmail.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- drivers/pci/hotplug/pciehp_hpc.c | 7 ++++---
- 1 file changed, 4 insertions(+), 3 deletions(-)
-
---- a/drivers/pci/hotplug/pciehp_hpc.c
-+++ b/drivers/pci/hotplug/pciehp_hpc.c
-@@ -642,6 +642,8 @@ read_status:
- */
- if (ctrl->power_fault_detected)
- status &= ~PCI_EXP_SLTSTA_PFD;
-+ else if (status & PCI_EXP_SLTSTA_PFD)
-+ ctrl->power_fault_detected = true;
-
- events |= status;
- if (!events) {
-@@ -651,7 +653,7 @@ read_status:
- }
-
- if (status) {
-- pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, events);
-+ pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, status);
-
- /*
- * In MSI mode, all event bits must be zero before the port
-@@ -725,8 +727,7 @@ static irqreturn_t pciehp_ist(int irq, v
- }
-
- /* Check Power Fault Detected */
-- if ((events & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) {
-- ctrl->power_fault_detected = 1;
-+ if (events & PCI_EXP_SLTSTA_PFD) {
- ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl));
- pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
- PCI_EXP_SLTCTL_ATTN_IND_ON);
powerpc-64s-radix-fix-huge-vmap-false-positive.patch
pci-xgene-fix-ib-window-setup.patch
pci-pciehp-use-down_read-write_nested-reset_lock-to-fix-lockdep-errors.patch
-pci-pciehp-fix-infinite-loop-in-irq-handler-upon-power-fault.patch
pci-pci-bridge-emul-make-expansion-rom-base-address-register-read-only.patch
pci-pci-bridge-emul-properly-mark-reserved-pcie-bits-in-pci-config-space.patch
pci-pci-bridge-emul-fix-definitions-of-reserved-bits.patch
+++ /dev/null
-From 23584c1ed3e15a6f4bfab8dc5a88d94ab929ee12 Mon Sep 17 00:00:00 2001
-From: Lukas Wunner <lukas@wunner.de>
-Date: Wed, 17 Nov 2021 23:22:09 +0100
-Subject: PCI: pciehp: Fix infinite loop in IRQ handler upon power fault
-
-From: Lukas Wunner <lukas@wunner.de>
-
-commit 23584c1ed3e15a6f4bfab8dc5a88d94ab929ee12 upstream.
-
-The Power Fault Detected bit in the Slot Status register differs from
-all other hotplug events in that it is sticky: It can only be cleared
-after turning off slot power. Per PCIe r5.0, sec. 6.7.1.8:
-
- If a power controller detects a main power fault on the hot-plug slot,
- it must automatically set its internal main power fault latch [...].
- The main power fault latch is cleared when software turns off power to
- the hot-plug slot.
-
-The stickiness used to cause interrupt storms and infinite loops which
-were fixed in 2009 by commits 5651c48cfafe ("PCI pciehp: fix power fault
-interrupt storm problem") and 99f0169c17f3 ("PCI: pciehp: enable
-software notification on empty slots").
-
-Unfortunately in 2020 the infinite loop issue was inadvertently
-reintroduced by commit 8edf5332c393 ("PCI: pciehp: Fix MSI interrupt
-race"): The hardirq handler pciehp_isr() clears the PFD bit until
-pciehp's power_fault_detected flag is set. That happens in the IRQ
-thread pciehp_ist(), which never learns of the event because the hardirq
-handler is stuck in an infinite loop. Fix by setting the
-power_fault_detected flag already in the hardirq handler.
-
-Link: https://bugzilla.kernel.org/show_bug.cgi?id=214989
-Link: https://lore.kernel.org/linux-pci/DM8PR11MB5702255A6A92F735D90A4446868B9@DM8PR11MB5702.namprd11.prod.outlook.com
-Fixes: 8edf5332c393 ("PCI: pciehp: Fix MSI interrupt race")
-Link: https://lore.kernel.org/r/66eaeef31d4997ceea357ad93259f290ededecfd.1637187226.git.lukas@wunner.de
-Reported-by: Joseph Bao <joseph.bao@intel.com>
-Tested-by: Joseph Bao <joseph.bao@intel.com>
-Signed-off-by: Lukas Wunner <lukas@wunner.de>
-Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
-Cc: stable@vger.kernel.org # v4.19+
-Cc: Stuart Hayes <stuart.w.hayes@gmail.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- drivers/pci/hotplug/pciehp_hpc.c | 7 ++++---
- 1 file changed, 4 insertions(+), 3 deletions(-)
-
---- a/drivers/pci/hotplug/pciehp_hpc.c
-+++ b/drivers/pci/hotplug/pciehp_hpc.c
-@@ -642,6 +642,8 @@ read_status:
- */
- if (ctrl->power_fault_detected)
- status &= ~PCI_EXP_SLTSTA_PFD;
-+ else if (status & PCI_EXP_SLTSTA_PFD)
-+ ctrl->power_fault_detected = true;
-
- events |= status;
- if (!events) {
-@@ -651,7 +653,7 @@ read_status:
- }
-
- if (status) {
-- pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, events);
-+ pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, status);
-
- /*
- * In MSI mode, all event bits must be zero before the port
-@@ -725,8 +727,7 @@ static irqreturn_t pciehp_ist(int irq, v
- }
-
- /* Check Power Fault Detected */
-- if ((events & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) {
-- ctrl->power_fault_detected = 1;
-+ if (events & PCI_EXP_SLTSTA_PFD) {
- ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl));
- pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
- PCI_EXP_SLTCTL_ATTN_IND_ON);
drm-i915-display-ehl-update-voltage-swing-table.patch
pci-xgene-fix-ib-window-setup.patch
pci-pciehp-use-down_read-write_nested-reset_lock-to-fix-lockdep-errors.patch
-pci-pciehp-fix-infinite-loop-in-irq-handler-upon-power-fault.patch
pci-pci-bridge-emul-make-expansion-rom-base-address-register-read-only.patch
pci-pci-bridge-emul-properly-mark-reserved-pcie-bits-in-pci-config-space.patch
pci-pci-bridge-emul-fix-definitions-of-reserved-bits.patch
+++ /dev/null
-From 23584c1ed3e15a6f4bfab8dc5a88d94ab929ee12 Mon Sep 17 00:00:00 2001
-From: Lukas Wunner <lukas@wunner.de>
-Date: Wed, 17 Nov 2021 23:22:09 +0100
-Subject: PCI: pciehp: Fix infinite loop in IRQ handler upon power fault
-
-From: Lukas Wunner <lukas@wunner.de>
-
-commit 23584c1ed3e15a6f4bfab8dc5a88d94ab929ee12 upstream.
-
-The Power Fault Detected bit in the Slot Status register differs from
-all other hotplug events in that it is sticky: It can only be cleared
-after turning off slot power. Per PCIe r5.0, sec. 6.7.1.8:
-
- If a power controller detects a main power fault on the hot-plug slot,
- it must automatically set its internal main power fault latch [...].
- The main power fault latch is cleared when software turns off power to
- the hot-plug slot.
-
-The stickiness used to cause interrupt storms and infinite loops which
-were fixed in 2009 by commits 5651c48cfafe ("PCI pciehp: fix power fault
-interrupt storm problem") and 99f0169c17f3 ("PCI: pciehp: enable
-software notification on empty slots").
-
-Unfortunately in 2020 the infinite loop issue was inadvertently
-reintroduced by commit 8edf5332c393 ("PCI: pciehp: Fix MSI interrupt
-race"): The hardirq handler pciehp_isr() clears the PFD bit until
-pciehp's power_fault_detected flag is set. That happens in the IRQ
-thread pciehp_ist(), which never learns of the event because the hardirq
-handler is stuck in an infinite loop. Fix by setting the
-power_fault_detected flag already in the hardirq handler.
-
-Link: https://bugzilla.kernel.org/show_bug.cgi?id=214989
-Link: https://lore.kernel.org/linux-pci/DM8PR11MB5702255A6A92F735D90A4446868B9@DM8PR11MB5702.namprd11.prod.outlook.com
-Fixes: 8edf5332c393 ("PCI: pciehp: Fix MSI interrupt race")
-Link: https://lore.kernel.org/r/66eaeef31d4997ceea357ad93259f290ededecfd.1637187226.git.lukas@wunner.de
-Reported-by: Joseph Bao <joseph.bao@intel.com>
-Tested-by: Joseph Bao <joseph.bao@intel.com>
-Signed-off-by: Lukas Wunner <lukas@wunner.de>
-Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
-Cc: stable@vger.kernel.org # v4.19+
-Cc: Stuart Hayes <stuart.w.hayes@gmail.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- drivers/pci/hotplug/pciehp_hpc.c | 7 ++++---
- 1 file changed, 4 insertions(+), 3 deletions(-)
-
---- a/drivers/pci/hotplug/pciehp_hpc.c
-+++ b/drivers/pci/hotplug/pciehp_hpc.c
-@@ -642,6 +642,8 @@ read_status:
- */
- if (ctrl->power_fault_detected)
- status &= ~PCI_EXP_SLTSTA_PFD;
-+ else if (status & PCI_EXP_SLTSTA_PFD)
-+ ctrl->power_fault_detected = true;
-
- events |= status;
- if (!events) {
-@@ -651,7 +653,7 @@ read_status:
- }
-
- if (status) {
-- pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, events);
-+ pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, status);
-
- /*
- * In MSI mode, all event bits must be zero before the port
-@@ -725,8 +727,7 @@ static irqreturn_t pciehp_ist(int irq, v
- }
-
- /* Check Power Fault Detected */
-- if ((events & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) {
-- ctrl->power_fault_detected = 1;
-+ if (events & PCI_EXP_SLTSTA_PFD) {
- ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl));
- pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
- PCI_EXP_SLTCTL_ATTN_IND_ON);
drm-i915-display-ehl-update-voltage-swing-table.patch
pci-xgene-fix-ib-window-setup.patch
pci-pciehp-use-down_read-write_nested-reset_lock-to-fix-lockdep-errors.patch
-pci-pciehp-fix-infinite-loop-in-irq-handler-upon-power-fault.patch
pci-pci-bridge-emul-make-expansion-rom-base-address-register-read-only.patch
pci-pci-bridge-emul-properly-mark-reserved-pcie-bits-in-pci-config-space.patch
pci-pci-bridge-emul-fix-definitions-of-reserved-bits.patch
+++ /dev/null
-From 23584c1ed3e15a6f4bfab8dc5a88d94ab929ee12 Mon Sep 17 00:00:00 2001
-From: Lukas Wunner <lukas@wunner.de>
-Date: Wed, 17 Nov 2021 23:22:09 +0100
-Subject: PCI: pciehp: Fix infinite loop in IRQ handler upon power fault
-
-From: Lukas Wunner <lukas@wunner.de>
-
-commit 23584c1ed3e15a6f4bfab8dc5a88d94ab929ee12 upstream.
-
-The Power Fault Detected bit in the Slot Status register differs from
-all other hotplug events in that it is sticky: It can only be cleared
-after turning off slot power. Per PCIe r5.0, sec. 6.7.1.8:
-
- If a power controller detects a main power fault on the hot-plug slot,
- it must automatically set its internal main power fault latch [...].
- The main power fault latch is cleared when software turns off power to
- the hot-plug slot.
-
-The stickiness used to cause interrupt storms and infinite loops which
-were fixed in 2009 by commits 5651c48cfafe ("PCI pciehp: fix power fault
-interrupt storm problem") and 99f0169c17f3 ("PCI: pciehp: enable
-software notification on empty slots").
-
-Unfortunately in 2020 the infinite loop issue was inadvertently
-reintroduced by commit 8edf5332c393 ("PCI: pciehp: Fix MSI interrupt
-race"): The hardirq handler pciehp_isr() clears the PFD bit until
-pciehp's power_fault_detected flag is set. That happens in the IRQ
-thread pciehp_ist(), which never learns of the event because the hardirq
-handler is stuck in an infinite loop. Fix by setting the
-power_fault_detected flag already in the hardirq handler.
-
-Link: https://bugzilla.kernel.org/show_bug.cgi?id=214989
-Link: https://lore.kernel.org/linux-pci/DM8PR11MB5702255A6A92F735D90A4446868B9@DM8PR11MB5702.namprd11.prod.outlook.com
-Fixes: 8edf5332c393 ("PCI: pciehp: Fix MSI interrupt race")
-Link: https://lore.kernel.org/r/66eaeef31d4997ceea357ad93259f290ededecfd.1637187226.git.lukas@wunner.de
-Reported-by: Joseph Bao <joseph.bao@intel.com>
-Tested-by: Joseph Bao <joseph.bao@intel.com>
-Signed-off-by: Lukas Wunner <lukas@wunner.de>
-Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
-Cc: stable@vger.kernel.org # v4.19+
-Cc: Stuart Hayes <stuart.w.hayes@gmail.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- drivers/pci/hotplug/pciehp_hpc.c | 7 ++++---
- 1 file changed, 4 insertions(+), 3 deletions(-)
-
---- a/drivers/pci/hotplug/pciehp_hpc.c
-+++ b/drivers/pci/hotplug/pciehp_hpc.c
-@@ -577,6 +577,8 @@ read_status:
- */
- if (ctrl->power_fault_detected)
- status &= ~PCI_EXP_SLTSTA_PFD;
-+ else if (status & PCI_EXP_SLTSTA_PFD)
-+ ctrl->power_fault_detected = true;
-
- events |= status;
- if (!events) {
-@@ -586,7 +588,7 @@ read_status:
- }
-
- if (status) {
-- pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, events);
-+ pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, status);
-
- /*
- * In MSI mode, all event bits must be zero before the port
-@@ -660,8 +662,7 @@ static irqreturn_t pciehp_ist(int irq, v
- }
-
- /* Check Power Fault Detected */
-- if ((events & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) {
-- ctrl->power_fault_detected = 1;
-+ if (events & PCI_EXP_SLTSTA_PFD) {
- ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl));
- pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
- PCI_EXP_SLTCTL_ATTN_IND_ON);
drm-etnaviv-limit-submit-sizes.patch
drm-nouveau-kms-nv04-use-vzalloc-for-nv04_display.patch
drm-bridge-analogix_dp-make-psr-exit-block-less.patch
-pci-pciehp-fix-infinite-loop-in-irq-handler-upon-power-fault.patch
pci-pci-bridge-emul-properly-mark-reserved-pcie-bits-in-pci-config-space.patch
pci-pci-bridge-emul-correctly-set-pcie-capabilities.patch
pci-pci-bridge-emul-set-pci_status_cap_list-for-pcie-device.patch
projects / thirdparty / kernel / stable-queue.git / commitdiff
