ref: f5ff6d6f34e2cab60722a8a2e8444436c969bfeb
parent: 56d9f57dc8afd8ef4c6d54a10c958446dd2d7fbe
author: cinap_lenrek <cinap_lenrek@gmx.de>
date: Fri Feb 22 07:23:01 EST 2013
sdiahci: prevent nil pointer dereference on spurious interrupt status on some controllers, we get bogus interrupt indication for non present drives. ack the irq but ignore.
--- a/sys/src/9/pc/sdiahci.c
+++ b/sys/src/9/pc/sdiahci.c
@@ -1201,7 +1201,7 @@
cause &= ~m;
d = c->rawdrive + i;
ilock(d);
- if(d->port->isr && c->hba->pi & m)
+ if(d->port != nil && d->port->isr && c->hba->pi & m)
updatedrive(d);
c->hba->isr = m;
iunlock(d);
--
⑨