Milan KrsticandHauke Mehrtens
862a4edfa6
Fixes 5G modem issues in TCL LINKHUB HH500V introduced with 738876e
(torvalds/linux@2ef3886)
Signed-off-by: Milan Krstic <milan.krstic@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22985
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
31 lines
1.3 KiB
Diff
31 lines
1.3 KiB
Diff
From 86f6dc05ea051fa03ebc03174bc00f734593465d Mon Sep 17 00:00:00 2001
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From: Javier Achirica <jachirica@gmail.com>
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Date: Fri, 3 Apr 2026 12:30:03 +0200
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Subject: bus: mhi: host: pci_generic: Round up nr_irqs to power of two
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When an MHI device uses standard MSI, the PCI core requires the allocated
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number of vectors to be a strict power of two. But devices will only ask
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for the irqs they need, so they might not be properly aligned.
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Make sure a power-of-2 number of vectors is requested.
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Signed-off-by: Javier Achirica <jachirica@gmail.com>
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Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
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Link: https://patch.msgid.link/CACixm21q7b_diEx5COZxVZm9EhZ0hnakM_WBjEWcCsznfWeniw@mail.gmail.com
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---
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drivers/bus/mhi/host/pci_generic.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/bus/mhi/host/pci_generic.c
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+++ b/drivers/bus/mhi/host/pci_generic.c
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@@ -1139,7 +1139,8 @@ static int mhi_pci_get_irqs(struct mhi_c
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*/
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mhi_cntrl->nr_irqs = 1 + mhi_cntrl_config->num_events;
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- nr_vectors = pci_alloc_irq_vectors(pdev, 1, mhi_cntrl->nr_irqs, PCI_IRQ_MSIX | PCI_IRQ_MSI);
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+ nr_vectors = pci_alloc_irq_vectors(pdev, 1, roundup_pow_of_two(mhi_cntrl->nr_irqs),
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+ PCI_IRQ_MSIX | PCI_IRQ_MSI);
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if (nr_vectors < 0) {
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dev_err(&pdev->dev, "Error allocating MSI vectors %d\n",
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nr_vectors);
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