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authorLinus Torvalds <torvalds@linux-foundation.org>2022-02-11 12:55:17 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-02-11 12:55:17 -0800
commitadccc16ea3c5fb205bdec0133d08e799aa6cc9ea (patch)
tree05b0817d6e5025d249f3c639baa015519e466d59 /drivers/pci
parent1d41d2e82623b40ee27811fe9ea38bafe2e722e9 (diff)
parent075b7d363c675ef7fa03918881caeca3458e2a96 (diff)
downloadlinux-adccc16ea3c5fb205bdec0133d08e799aa6cc9ea.tar.bz2
Merge tag 'pci-v5.17-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull pci fix from Bjorn Helgaas: "Revert a commit that reduced the number of IRQs used but resulted in interrupt storms (Bjorn Helgaas)" * tag 'pci-v5.17-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: Revert "PCI/portdrv: Do not setup up IRQs if there are no users"
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pcie/portdrv_core.c47
1 files changed, 17 insertions, 30 deletions
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index bda630889f95..604feeb84ee4 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -166,6 +166,9 @@ static int pcie_init_service_irqs(struct pci_dev *dev, int *irqs, int mask)
{
int ret, i;
+ for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
+ irqs[i] = -1;
+
/*
* If we support PME but can't use MSI/MSI-X for it, we have to
* fall back to INTx or other interrupts, e.g., a system shared
@@ -314,10 +317,8 @@ static int pcie_device_init(struct pci_dev *pdev, int service, int irq)
*/
int pcie_port_device_register(struct pci_dev *dev)
{
- int status, capabilities, irq_services, i, nr_service;
- int irqs[PCIE_PORT_DEVICE_MAXSERVICES] = {
- [0 ... PCIE_PORT_DEVICE_MAXSERVICES-1] = -1
- };
+ int status, capabilities, i, nr_service;
+ int irqs[PCIE_PORT_DEVICE_MAXSERVICES];
/* Enable PCI Express port device */
status = pci_enable_device(dev);
@@ -330,32 +331,18 @@ int pcie_port_device_register(struct pci_dev *dev)
return 0;
pci_set_master(dev);
-
- irq_services = 0;
- if (IS_ENABLED(CONFIG_PCIE_PME))
- irq_services |= PCIE_PORT_SERVICE_PME;
- if (IS_ENABLED(CONFIG_PCIEAER))
- irq_services |= PCIE_PORT_SERVICE_AER;
- if (IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE))
- irq_services |= PCIE_PORT_SERVICE_HP;
- if (IS_ENABLED(CONFIG_PCIE_DPC))
- irq_services |= PCIE_PORT_SERVICE_DPC;
- irq_services &= capabilities;
-
- if (irq_services) {
- /*
- * Initialize service IRQs. Don't use service devices that
- * require interrupts if there is no way to generate them.
- * However, some drivers may have a polling mode (e.g.
- * pciehp_poll_mode) that can be used in the absence of IRQs.
- * Allow them to determine if that is to be used.
- */
- status = pcie_init_service_irqs(dev, irqs, irq_services);
- if (status) {
- irq_services &= PCIE_PORT_SERVICE_HP;
- if (!irq_services)
- goto error_disable;
- }
+ /*
+ * Initialize service irqs. Don't use service devices that
+ * require interrupts if there is no way to generate them.
+ * However, some drivers may have a polling mode (e.g. pciehp_poll_mode)
+ * that can be used in the absence of irqs. Allow them to determine
+ * if that is to be used.
+ */
+ status = pcie_init_service_irqs(dev, irqs, capabilities);
+ if (status) {
+ capabilities &= PCIE_PORT_SERVICE_HP;
+ if (!capabilities)
+ goto error_disable;
}
/* Allocate child services if any */