diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2022-06-18 23:37:12 +0000 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2022-06-18 23:37:12 +0000 |
| commit | 990ceeef3bfd9d56e2e6dd39cf5ac185b1a2de08 (patch) | |
| tree | bebd25b1cdb8640b1d9bcc8e44f8107a4de004f7 /sys/src | |
| parent | 2b1ecbe87da757ddb12e38239773a05f816d03ae (diff) | |
nusb/usbd: retry opendevtata() a few times on attach (work around mnt-reform trackball)
this is a known and already fixed issue with version the following version
of the mnt-reform trackball firmware:
https://source.mnt.re/reform/reform/-/commit/55ca5bf848b57cdf6e7243fc1018411f6c8ab9b5
Diffstat (limited to 'sys/src')
| -rw-r--r-- | sys/src/cmd/nusb/usbd/hub.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sys/src/cmd/nusb/usbd/hub.c b/sys/src/cmd/nusb/usbd/hub.c index 1a484625d..e04a4aedc 100644 --- a/sys/src/cmd/nusb/usbd/hub.c +++ b/sys/src/cmd/nusb/usbd/hub.c @@ -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); - goto Fail; + 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); |