[PATCH RFC 51/77] mthca: Update MSI/MSI-X interrupts enablement code
From: Alexander Gordeev <hidden>
Date: 2013-10-02 16:36:26
Also in:
linux-ide, linux-mips, linux-pci, linux-rdma, linux-s390, linux-scsi, lkml, netdev
Subsystem:
infiniband subsystem, the rest · Maintainers:
Jason Gunthorpe, Leon Romanovsky, Linus Torvalds
As result of recent re-design of the MSI/MSI-X interrupts enabling pattern this driver has to be updated to use the new technique to obtain a optimal number of MSI/MSI-X interrupts required. Signed-off-by: Alexander Gordeev <redacted> --- drivers/infiniband/hw/mthca/mthca_main.c | 16 +++++++++++----- 1 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c
index 87897b9..3d44ca4 100644
--- a/drivers/infiniband/hw/mthca/mthca_main.c
+++ b/drivers/infiniband/hw/mthca/mthca_main.c@@ -854,17 +854,23 @@ static int mthca_enable_msi_x(struct mthca_dev *mdev) struct msix_entry entries[3]; int err; + err = pci_msix_table_size(mdev->pdev); + if (err < 0) + return err; + if (err < ARRAY_SIZE(entries)) { + mthca_info(mdev, "Only %d MSI-X vectors available, " + "not using MSI-X\n", err); + + return -ENOSPC; + } + entries[0].entry = 0; entries[1].entry = 1; entries[2].entry = 2; err = pci_enable_msix(mdev->pdev, entries, ARRAY_SIZE(entries)); - if (err) { - if (err > 0) - mthca_info(mdev, "Only %d MSI-X vectors available, " - "not using MSI-X\n", err); + if (err) return err; - } mdev->eq_table.eq[MTHCA_EQ_COMP ].msi_x_vector = entries[0].vector; mdev->eq_table.eq[MTHCA_EQ_ASYNC].msi_x_vector = entries[1].vector;
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1.7.7.6