linux-kernel - [RESEND PATCH] misc: bcm-vk: Specify the minimum number of IRQ vecs

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Message-Id: <20220812094011.4064729-1-leitao@debian.org>
Date:   Fri, 12 Aug 2022 02:40:11 -0700
From:   Breno Leitao <leitao@...ian.org>
To:     arnd@...db.de, gregkh@...uxfoundation.org
Cc:     scott.branden@...adcom.com, bcm-kernel-feedback-list@...adcom.com,
        linux-kernel@...r.kernel.org, Kernel-team@...com
Subject: [RESEND PATCH] misc: bcm-vk: Specify the minimum number of IRQ vecs

During bcm_vk_probe(), pci_alloc_irq_vectors() is called passing the
number of IRQ vectors as 1, but, later, check how many IRQ vectors it
got, and fails if it is smaller than VK_MSIX_IRQ_MIN_REQ.

The most appropriated way to do it is setting the 'min_vecs' param as
VK_MSIX_IRQ_MIN_REQ, instead of one. pci_alloc_irq_vectors() should
know the requirements when called.

The test was done by just loading this module on a machine with a
Valkyrie offload engine hardware.

Signed-off-by: Breno Leitao <leitao@...ian.org>
Acked-by: Scott Branden <scott.branden@...adcom.com>
---
 drivers/misc/bcm-vk/bcm_vk_dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/bcm-vk/bcm_vk_dev.c b/drivers/misc/bcm-vk/bcm_vk_dev.c
index a3a82ebbc699..d4a96137728d 100644
--- a/drivers/misc/bcm-vk/bcm_vk_dev.c
+++ b/drivers/misc/bcm-vk/bcm_vk_dev.c
@@ -1339,7 +1339,7 @@ static int bcm_vk_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	pci_set_drvdata(pdev, vk);

 	irq = pci_alloc_irq_vectors(pdev,
-				    1,
+				    VK_MSIX_IRQ_MIN_REQ,
 				    VK_MSIX_IRQ_MAX,
 				    PCI_IRQ_MSI | PCI_IRQ_MSIX);

-- 
2.30.2