From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Tue, 26 May 2009 13:46:10 +0000 (+0200)
Subject: virtio: enhance id_matching for virtio drivers
X-Git-Tag: firefly_0821_release~13959^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e3353853730eb99c56b7b0aed1667d51c0e3699a;p=firefly-linux-kernel-4.4.55.git

virtio: enhance id_matching for virtio drivers

This patch allows a virtio driver to use VIRTIO_DEV_ANY_ID for the
device id. This will be used by a test module that can be bound to
any virtio device.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---

diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 22642a255d32..3a43ebf83a49 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -58,7 +58,7 @@ static struct device_attribute virtio_dev_attrs[] = {
 static inline int virtio_id_match(const struct virtio_device *dev,
 				  const struct virtio_device_id *id)
 {
-	if (id->device != dev->id.device)
+	if (id->device != dev->id.device && id->device != VIRTIO_DEV_ANY_ID)
 		return 0;
 
 	return id->vendor == VIRTIO_DEV_ANY_ID || id->vendor == dev->id.vendor;
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index a3344285ccf4..40e0045876ee 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -641,7 +641,7 @@ static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
 	id->vendor = TO_NATIVE(id->vendor);
 
 	strcpy(alias, "virtio:");
-	ADD(alias, "d", 1, id->device);
+	ADD(alias, "d", id->device != VIRTIO_DEV_ANY_ID, id->device);
 	ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
 
 	add_wildcard(alias);