| From | Alexander Gordeev <> | Subject | [PATCH v2 1/9] ahci: Fix broken fallback to single MSI mode | Date | Fri, 17 Jan 2014 17:02:15 +0100 |
| |
Commit 7b92b4f ("PCI/MSI: Remove pci_enable_msi_block_auto()") introduced a regression - in case multiple MSIs initialization fails the code falls back to INTx rather than to single MSI.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com> --- drivers/ata/ahci.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 8516f4d..df24eef4 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1117,8 +1117,10 @@ int ahci_init_interrupts(struct pci_dev *pdev, unsigned int n_ports, nvec = rc; rc = pci_enable_msi_block(pdev, nvec); - if (rc) + if (rc < 0) goto intx; + else if (rc > 0) + goto single_msi; return nvec; -- 1.7.7.6
|