git: 9front

Download patch

ref: f4cd802657b89270653c95d224156ff78981d7ca
parent: 106cbc54a185bca1efa644f3aed97a4b3e5e35eb
author: aiju <devnull@localhost>
date: Fri Jan 10 15:43:24 EST 2020 

dont spin on MDIO


--- a/sys/src/9/cycv/ethercycv.c
+++ b/sys/src/9/cycv/ethercycv.c
@@ -87,18 +87,22 @@
 static void
 mdwrite(Ctlr *c, int r, u16int v)
 {
-	while((c->r[GMII_ADDRESS] & 1<<0) != 0);
+	while((c->r[GMII_ADDRESS] & 1<<0) != 0)
+		tsleep(&up->sleep, return0, nil, 1);
 	c->r[GMII_DATA] = v;
 	c->r[GMII_ADDRESS] = 1<<11 | (r&31)<<6 | 1<<1 | 1<<0;
-	while((c->r[GMII_ADDRESS] & 1<<0) != 0);
+	while((c->r[GMII_ADDRESS] & 1<<0) != 0)
+		tsleep(&up->sleep, return0, nil, 1);
 }
 
 static u16int
 mdread(Ctlr *c, int r)
 {
-	while((c->r[GMII_ADDRESS] & 1<<0) != 0);
+	while((c->r[GMII_ADDRESS] & 1<<0) != 0)
+		tsleep(&up->sleep, return0, nil, 1);
 	c->r[GMII_ADDRESS] = 1<<11 | (r&31)<<6 | 1<<0;
-	while((c->r[GMII_ADDRESS] & 1<<0) != 0);
+	while((c->r[GMII_ADDRESS] & 1<<0) != 0)
+		tsleep(&up->sleep, return0, nil, 1);
 	return c->r[GMII_DATA];
 }
 
-- 
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