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nusb/usbd: retry opendevtata() a few times on attach (work around mnt-reform trackball)

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this is a known and already fixed issue with version the following version
of the mnt-reform trackball firmware:

55ca5bf848
This commit is contained in:
cinap_lenrek 2022-06-18 23:37:12 +00:00
parent 2b1ecbe87d
commit 990ceeef3b
1 changed files with 7 additions and 2 deletions
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7
sys/src/cmd/nusb/usbd/hub.c
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@ -355,6 +355,7 @@ portattach(Hub *h, int p, u32int sts)
char *sp;
int mp;
int nr;
int i;
d = h->dev;
pp = &h->port[p];
@ -421,9 +422,13 @@ portattach(Hub *h, int p, u32int sts)
nd->isusb3 = h->dev->isusb3;
if(usbdebug > 2)
devctl(nd, "debug 1");
if(opendevdata(nd, ORDWR) < 0){
for(i=0;; i++){
if(opendevdata(nd, ORDWR) >= 0)
break;
fprint(2, "%s: %s: opendevdata: %r\n", argv0, nd->dir);
if(i >= 4)
goto Fail;
sleep(500);
}
if(usbcmd(nd, Rh2d|Rstd|Rdev, Rsetaddress, nd->id, 0, nil, 0) < 0){
dprint(2, "%s: %s: port %d: setaddress: %r\n", argv0, d->dir, p);