shithub: riscv

Download patch

ref: ffd9c39d1c019c9592b8b8981a463afa040c7f98
parent: 9ab87f6241ef1b3bb6b179b109b016a383eed6a8
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];
 }