linux-kernel - [PATCH 2/2] PCI: add support for dynamic ID when checking for duplicate IDs

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Date:   Wed, 21 Oct 2020 16:10:30 +0800
From:   Zhenzhong Duan <zhenzhong.duan@...il.com>
To:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Cc:     bhelgaas@...gle.com, Zhenzhong Duan <zhenzhong.duan@...il.com>
Subject: [PATCH 2/2] PCI: add support for dynamic ID when checking for duplicate IDs

When a device ID data is writen to /sys/bus/pci/drivers/.../new_id,
only static ID table is checked for duplicate and multiple dynamic id
entries of same kind are allowed to be dynamically linked.

Fix it by calling pci_match_device() which checks both dynamic and static IDs.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...il.com>
---
 drivers/pci/pci-driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index bd9cfd1..751c605 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -125,7 +125,7 @@ static ssize_t new_id_store(struct device_driver *driver, const char *buf,
 		pdev->subsystem_device = subdevice;
 		pdev->class = class;
 
-		if (pci_match_id(pdrv->id_table, pdev))
+		if (pci_match_device(pdrv, pdev))
 			retval = -EEXIST;
 
 		kfree(pdev);
-- 
1.8.3.1