linux-kernel - [PATCH v2 3/5] mei: pxp: match without driver name

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Date:   Tue, 14 Nov 2023 12:08:41 +0200
From:   Alexander Usyskin <alexander.usyskin@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lucas De Marchi <lucas.demarchi@...el.com>,
        Daniele Ceraolo Spurio <daniele.ceraolospurio@...el.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc:     Tomas Winkler <tomas.winkler@...el.com>,
        Alexander Usyskin <alexander.usyskin@...el.com>,
        Vitaly Lubart <vitaly.lubart@...el.com>,
        intel-xe@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 3/5] mei: pxp: match without driver name

Remove dependency on i915 driver name in component_match function.
Use PCI header information to match Intel graphics device.

Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
---
 drivers/misc/mei/pxp/mei_pxp.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/mei/pxp/mei_pxp.c b/drivers/misc/mei/pxp/mei_pxp.c
index 2dcb9169e404..e74b2facfdf9 100644
--- a/drivers/misc/mei/pxp/mei_pxp.c
+++ b/drivers/misc/mei/pxp/mei_pxp.c
@@ -12,6 +12,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/mei.h>
 #include <linux/mei_cl_bus.h>
@@ -154,12 +155,21 @@ static int mei_pxp_component_match(struct device *dev, int subcomponent,
 				   void *data)
 {
 	struct device *base = data;
+	struct pci_dev *pdev;
 
 	if (!dev)
 		return 0;
 
-	if (!dev->driver || strcmp(dev->driver->name, "i915") ||
-	    subcomponent != I915_COMPONENT_PXP)
+	if (!dev_is_pci(dev))
+		return 0;
+
+	pdev = to_pci_dev(dev);
+
+	if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8) ||
+	    pdev->vendor != PCI_VENDOR_ID_INTEL)
+		return 0;
+
+	if (subcomponent != I915_COMPONENT_PXP)
 		return 0;
 
 	base = base->parent;
-- 
2.34.1