diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2018-10-06 00:29:05 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2018-10-06 00:29:05 +0200 |
| commit | f9839ed0a29a0598fa383f9c5e8d5c366f93596a (patch) | |
| tree | 6ead35c7a7cf83d8b75c7f9d9c26b110c81b1856 /sys/src/9/pc/usbehcipc.c | |
| parent | 83876083c9bba29e01ce1a82cba77d84f6382f07 (diff) | |
usbehci, usbxhci: add *noehcihandoff= and *noxhcihandoff= parameters
on Samsung ATIV Smart PC Pro XE00T1C-A01CL, the EHCI handoff
causes the system to freeze in UEFI mode as soon as we assert
the os semaphore bit.
until a general solution is found, provide these parameters to
disable the handoff for now as it seems to otherwise work fine.
Diffstat (limited to 'sys/src/9/pc/usbehcipc.c')
| -rw-r--r-- | sys/src/9/pc/usbehcipc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/9/pc/usbehcipc.c b/sys/src/9/pc/usbehcipc.c index 082117c31..29a49bb6f 100644 --- a/sys/src/9/pc/usbehcipc.c +++ b/sys/src/9/pc/usbehcipc.c @@ -41,7 +41,7 @@ getehci(Ctlr* ctlr) off = ehciecap(ctlr, Clegacy); if(off == -1) return; - if(pcicfgr8(ctlr->pcidev, off+CLbiossem) != 0){ + if(getconf("*noehcihandoff") == nil && pcicfgr8(ctlr->pcidev, off+CLbiossem) != 0){ dprint("ehci %#p: bios active, taking over...\n", ctlr->capio); pcicfgw8(ctlr->pcidev, off+CLossem, 1); for(i = 0; i < 100; i++){ |