diff options
| author | Alexander Gordeev | 2014-01-17 17:02:15 +0100 |
|---|---|---|
| committer | Bjorn Helgaas | 2014-02-14 14:22:40 -0700 |
| commit | bc03fd3a8a95a13ecce413790f75f6e1a0f54d27 (patch) | |
| tree | 0cae63355cf967a728688a0bd96461dd79283a93 | |
| parent | f7fc32cb2073902b3ee67d036656889ea75ffcb7 (diff) | |
ahci: Fix broken fallback to single MSI mode
Commit 7b92b4f61ec4 ("PCI/MSI: Remove pci_enable_msi_block_auto()")
introduced a regression: if multiple MSI initialization fails, the code
falls back to INTx rather than to single MSI.
Fixes: 7b92b4f61ec4 ("PCI/MSI: Remove pci_enable_msi_block_auto()")
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | 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 dc2756fb6f33..3c5f35ef7e55 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1170,8 +1170,10 @@ static 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; |