Re: [PATCH v6 1/3] rpmsg: core: Add wildcard match for name service

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On 5/15/20 3:56 PM, Mathieu Poirier wrote:
Adding the capability to supplement the base definition published
by an rpmsg_driver with a postfix description so that it is possible
for several entity to use the same service.

Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Acked-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>

Going back to my review and testing done back on v2,

Acked-by: Suman Anna <s-anna@xxxxxx>

regards
Suman

---
  drivers/rpmsg/rpmsg_core.c | 20 +++++++++++++++++++-
  1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index a6361cad608b..5e01e8dede6b 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -399,7 +399,25 @@ ATTRIBUTE_GROUPS(rpmsg_dev);
  static inline int rpmsg_id_match(const struct rpmsg_device *rpdev,
  				  const struct rpmsg_device_id *id)
  {
-	return strncmp(id->name, rpdev->id.name, RPMSG_NAME_SIZE) == 0;
+	size_t len = min_t(size_t, strlen(id->name), RPMSG_NAME_SIZE);
+
+	/*
+	 * Allow for wildcard matches.  For example if rpmsg_driver::id_table
+	 * is:
+	 *
+	 * static struct rpmsg_device_id rpmsg_driver_sample_id_table[] = {
+	 *      { .name = "rpmsg-client-sample" },
+	 *      { },
+	 * }
+	 *
+	 * Then it is possible to support "rpmsg-client-sample*", i.e:
+	 *	rpmsg-client-sample
+	 *	rpmsg-client-sample_instance0
+	 *	rpmsg-client-sample_instance1
+	 *	...
+	 *	rpmsg-client-sample_instanceX
+	 */
+	return strncmp(id->name, rpdev->id.name, len) == 0;
  }
/* match rpmsg channel and rpmsg driver */





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