From 7276883f1f98cd0a92fdc049f69bdc0912f7fc16 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Wed, 9 Jul 2014 12:46:39 +0200 Subject: [PATCH] misc/GenWQE: fix pci_enable_msi usage GenWQE used to call pci_enable_msi_block to allocate a desired number of MSI's. If that was not possible pci_enable_msi_block returned with a smaller number which might be possible to allocate. GenWQE then called pci_enable_msi_block with that number. Since commit a30d0108b "GenWQE: Use pci_enable_msi_exact() instead of pci_enable_msi_block()" pci_enable_msi_exact is used which fails if the desired number of MSI's was not possible to allocate. Change GenWQE to use pci_enable_msi_range to restore the old behavior. Signed-off-by: Sebastian Ott Reviewed-by: Alexander Gordeev Signed-off-by: Greg Kroah-Hartman --- drivers/misc/genwqe/card_ddcb.c | 4 +--- drivers/misc/genwqe/card_utils.c | 10 ++++++---- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/misc/genwqe/card_ddcb.c b/drivers/misc/genwqe/card_ddcb.c index f0de6153bea2..dc9851a5540e 100644 --- a/drivers/misc/genwqe/card_ddcb.c +++ b/drivers/misc/genwqe/card_ddcb.c @@ -1251,9 +1251,7 @@ int genwqe_setup_service_layer(struct genwqe_dev *cd) } rc = genwqe_set_interrupt_capability(cd, GENWQE_MSI_IRQS); - if (rc > 0) - rc = genwqe_set_interrupt_capability(cd, rc); - if (rc != 0) { + if (rc) { rc = -ENODEV; goto stop_kthread; } diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c index 4a500582eef0..a6400f09229c 100644 --- a/drivers/misc/genwqe/card_utils.c +++ b/drivers/misc/genwqe/card_utils.c @@ -728,10 +728,12 @@ int genwqe_set_interrupt_capability(struct genwqe_dev *cd, int count) int rc; struct pci_dev *pci_dev = cd->pci_dev; - rc = pci_enable_msi_exact(pci_dev, count); - if (rc == 0) - cd->flags |= GENWQE_FLAG_MSI_ENABLED; - return rc; + rc = pci_enable_msi_range(pci_dev, 1, count); + if (rc < 0) + return rc; + + cd->flags |= GENWQE_FLAG_MSI_ENABLED; + return 0; } /**