diff options
| author | Javier Achirica <jachirica@gmail.com> | 2026-04-03 12:30:03 +0200 |
|---|---|---|
| committer | Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com> | 2026-05-12 19:57:13 +0530 |
| commit | 86f6dc05ea051fa03ebc03174bc00f734593465d (patch) | |
| tree | 2b94a4e694767c59f613df80b3e9ffc03736f335 | |
| parent | 254f49634ee16a731174d2ae34bc50bd5f45e731 (diff) | |
bus: mhi: host: pci_generic: Round up nr_irqs to power of two
When an MHI device uses standard MSI, the PCI core requires the allocated
number of vectors to be a strict power of two. But devices will only ask
for the irqs they need, so they might not be properly aligned.
Make sure a power-of-2 number of vectors is requested.
Signed-off-by: Javier Achirica <jachirica@gmail.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Link: https://patch.msgid.link/CACixm21q7b_diEx5COZxVZm9EhZ0hnakM_WBjEWcCsznfWeniw@mail.gmail.com
| -rw-r--r-- | drivers/bus/mhi/host/pci_generic.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c index 750da3dbb4c6..7efcbcf5a59e 100644 --- a/drivers/bus/mhi/host/pci_generic.c +++ b/drivers/bus/mhi/host/pci_generic.c @@ -1189,7 +1189,8 @@ static int mhi_pci_get_irqs(struct mhi_controller *mhi_cntrl, */ mhi_cntrl->nr_irqs = 1 + mhi_cntrl_config->num_events; - nr_vectors = pci_alloc_irq_vectors(pdev, 1, mhi_cntrl->nr_irqs, PCI_IRQ_MSIX | PCI_IRQ_MSI); + nr_vectors = pci_alloc_irq_vectors(pdev, 1, roundup_pow_of_two(mhi_cntrl->nr_irqs), + PCI_IRQ_MSIX | PCI_IRQ_MSI); if (nr_vectors < 0) { dev_err(&pdev->dev, "Error allocating MSI vectors %d\n", nr_vectors); |