linux-kernel - [PATCH 1/1] PCI/IDE: Fix using wrong VF ID for RID range calculation

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Message-Id: <20260111080631.506487-1-ming.li@zohomail.com>
Date: Sun, 11 Jan 2026 16:06:31 +0800
From: Li Ming <ming.li@...omail.com>
To: dan.j.williams@...el.com
Cc: linux-pci@...r.kernel.org,
	linux-coco@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Li Ming <ming.li@...omail.com>
Subject: [PATCH 1/1] PCI/IDE: Fix using wrong VF ID for RID range calculation

When allocate a new IDE stream for a pci device in SR-IOV case, the RID
range of the new IDE stream should cover all VFs of the device. VF id
range of a pci device is [0 - (num_VFs - 1)], so should use (num_VFs - )
as the last VF's ID.

Fixes: 1e4d2ff3ae45 ("PCI/IDE: Add IDE establishment helpers")
Signed-off-by: Li Ming <ming.li@...omail.com>
---
 drivers/pci/ide.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/ide.c b/drivers/pci/ide.c
index 26f7cc94ec31..9629f3ceb213 100644
--- a/drivers/pci/ide.c
+++ b/drivers/pci/ide.c
@@ -283,8 +283,8 @@ struct pci_ide *pci_ide_stream_alloc(struct pci_dev *pdev)
 	/* for SR-IOV case, cover all VFs */
 	num_vf = pci_num_vf(pdev);
 	if (num_vf)
-		rid_end = PCI_DEVID(pci_iov_virtfn_bus(pdev, num_vf),
-				    pci_iov_virtfn_devfn(pdev, num_vf));
+		rid_end = PCI_DEVID(pci_iov_virtfn_bus(pdev, num_vf - 1),
+				    pci_iov_virtfn_devfn(pdev, num_vf - 1));
 	else
 		rid_end = pci_dev_id(pdev);
 
-- 
2.34.1