From: Juxin Gao gaojuxin@loongson.cn
LoongArch inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I7AHL9
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Signed-off-by: Juxin Gao gaojuxin@loongson.cn Signed-off-by: Hongchen Zhang zhanghongchen@loongson.cn --- drivers/pci/msi/msi.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c index ef1d8857a51b..8298d02a667b 100644 --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -402,12 +402,32 @@ static int msi_capability_init(struct pci_dev *dev, int nvec, return ret; }
+#ifdef CONFIG_LOONGARCH +static unsigned int pci_irq_numbers = 32; + +static int __init pci_irq_limit(char *str) +{ + get_option(&str, &pci_irq_numbers); + + if (pci_irq_numbers == 0) + pci_irq_numbers = 32; + return 0; +} + +early_param("pci_irq_limit", pci_irq_limit); +#endif + int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, struct irq_affinity *affd) { int nvec; int rc;
+#ifdef CONFIG_LOONGARCH + if (maxvec > 32) + maxvec = pci_irq_numbers; +#endif + if (!pci_msi_supported(dev, minvec) || dev->current_state != PCI_D0) return -EINVAL;
@@ -778,6 +798,11 @@ int __pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, int { int hwsize, rc, nvec = maxvec;
+#ifdef CONFIG_LOONGARCH + if (maxvec > 32) + nvec = pci_irq_numbers; +#endif + if (maxvec < minvec) return -ERANGE;