[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH] PCI/MSI: msix_setup_msi_descs: Restore logic for msi_attrib.can_mask
From: Josef Johansson <josef@xxxxxxxxxxx> PCI/MSI: msix_setup_msi_descs: Restore logic for msi_attrib.can_mask Commit 71020a3c0dff4 ("PCI/MSI: Use msi_add_msi_desc()") modifies the logic of checking msi_attrib.can_mask, without any reason. This commits restores that logic. Fixes: 71020a3c0dff4 ("PCI/MSI: Use msi_add_msi_desc()") Signed-off-by: Josef Johansson <josef@xxxxxxxxxxx> --- Trying to fix a NULL BUG in the NVMe MSIX implementation I stumbled upon this code, which ironically was what my last MSI patch resulted into. I don't see any reason why this logic was change, nor do I have the possibility to see if anything works with my patch or without, since the kernel crashes in other places. As such this is still untested, but as far as I can tell it should restore functionality. Re-sending since it was rejected by linux-pci@xxxxxxxxxxxxxxx due to HTML contents. Sorry about that. CC xen-devel since it very much relates to Xen kernel (via pci_msi_ignore_mask). --- diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c index c19c7ca58186..146e7b9a01cc 100644 --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -526,7 +526,7 @@ static int msix_setup_msi_descs(struct pci_dev *dev, void __iomem *base, desc.pci.msi_attrib.can_mask = !pci_msi_ignore_mask && !desc.pci.msi_attrib.is_virtual; - if (!desc.pci.msi_attrib.can_mask) { + if (desc.pci.msi_attrib.can_mask) { addr = pci_msix_desc_addr(&desc); desc.pci.msix_ctrl = readl(addr + PCI_MSIX_ENTRY_VECTOR_CTRL); } -- 2.31.1
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