summaryrefslogtreecommitdiffstats
path: root/arch/s390/pci
diff options
context:
space:
mode:
authorSebastian Ott <sebott@linux.vnet.ibm.com>2014-10-29 19:12:04 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-11-03 13:30:12 +0100
commitb19148f6e2d90738ecf0c2eeeb9bdbae25c59e9b (patch)
treeed783c217e3f45029b243f615ce4e3ca239efcc7 /arch/s390/pci
parentf318a1229bd8d377282ddb37158812073701a22b (diff)
downloadop-kernel-dev-b19148f6e2d90738ecf0c2eeeb9bdbae25c59e9b.zip
op-kernel-dev-b19148f6e2d90738ecf0c2eeeb9bdbae25c59e9b.tar.gz
s390/pci: improve irq number check for msix
s390s arch_setup_msi_irqs function ensures that we don't return with more irqs than the PCI architecture allows and that a single PCI function doesn't consume more irqs than the kernel is configured for. At least the last check doesn't help much and should take the sum of all irqs into account. Since that's already done by irq_alloc_desc we can remove this check. As for the first check we should use the value provided by the firmware which can be less than what the PCI architecture allows. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/pci')
-rw-r--r--arch/s390/pci/pci.c3
-rw-r--r--arch/s390/pci/pci_clp.c1
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 2fa7b14..47a4568 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -369,8 +369,7 @@ int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
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);
+ msi_vecs = min_t(unsigned int, nvec, zdev->max_msi);
/* Allocate adapter summary indicator bit */
rc = -EIO;
diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c
index 6e22a24..d6e411e 100644
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -62,6 +62,7 @@ static void clp_store_query_pci_fngrp(struct zpci_dev *zdev,
zdev->tlb_refresh = response->refresh;
zdev->dma_mask = response->dasm;
zdev->msi_addr = response->msia;
+ zdev->max_msi = response->noi;
zdev->fmb_update = response->mui;
switch (response->version) {
OpenPOWER on IntegriCloud