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[RFC,v2,01/29] PCI/MSI/s390: Fix single MSI only check

Message ID 8792c33c7b28f2f07bb03009e50b3cf544c4ee04.1382103786.git.agordeev@redhat.com
State Superseded
Headers show

Commit Message

Alexander Gordeev Oct. 18, 2013, 5:12 p.m. UTC 
Multiple MSIs have never been supported on s390 architecture,
but the platform code fails to report single MSI only.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/pci/pci.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
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Patch

diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index f17a834..c79c6e4 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -427,6 +427,8 @@  int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
 	pr_debug("%s: requesting %d MSI-X interrupts...", __func__, nvec);
 	if (type != PCI_CAP_ID_MSIX && type != PCI_CAP_ID_MSI)
 		return -EINVAL;
+	if (type == PCI_CAP_ID_MSI && nvec > 1)
+		return 1;
 	msi_vecs = min(nvec, ZPCI_MSI_VEC_MAX);
 	msi_vecs = min_t(unsigned int, msi_vecs, CONFIG_PCI_NR_MSI);