From: Roland Dreier <roland@topspin.com>
Date: Sat, 16 Apr 2005 22:26:11 +0000 (-0700)
Subject: [PATCH] IB: Fix user MAD registrations with class 0
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0df3bb131f789f5929f7a239869e9945e4a5a734;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] IB: Fix user MAD registrations with class 0

Fix handling of MAD agent registrations with mgmt_class == 0.  In this case
ib_umad should pass a NULL registration request to the MAD core rather than a
request with mgmt_class set to 0.

Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 54b4f33b0bf9..56b9c2fa2ecc 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -389,15 +389,17 @@ static int ib_umad_reg_agent(struct ib_umad_file *file, unsigned long arg)
 	goto out;
 
 found:
-	req.mgmt_class         = ureq.mgmt_class;
-	req.mgmt_class_version = ureq.mgmt_class_version;
-	memcpy(req.method_mask, ureq.method_mask, sizeof req.method_mask);
-	memcpy(req.oui,         ureq.oui,         sizeof req.oui);
+	if (ureq.mgmt_class) {
+		req.mgmt_class         = ureq.mgmt_class;
+		req.mgmt_class_version = ureq.mgmt_class_version;
+		memcpy(req.method_mask, ureq.method_mask, sizeof req.method_mask);
+		memcpy(req.oui,         ureq.oui,         sizeof req.oui);
+	}
 
 	agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
 				      ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
-				      &req, 0, send_handler, recv_handler,
-				      file);
+				      ureq.mgmt_class ? &req : NULL,
+				      0, send_handler, recv_handler, file);
 	if (IS_ERR(agent)) {
 		ret = PTR_ERR(agent);
 		goto out;