diff options
| author | cinap_lenrek <cinap_lenrek@gmx.de> | 2013-02-22 12:23:01 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@gmx.de> | 2013-02-22 12:23:01 +0100 |
| commit | f5ff6d6f34e2cab60722a8a2e8444436c969bfeb (patch) | |
| tree | b7309d51cbb708cd46ac7da2f0c46a0faccfaf0a /sys/src/9/pc/sdiahci.c | |
| parent | 56d9f57dc8afd8ef4c6d54a10c958446dd2d7fbe (diff) | |
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.
Diffstat (limited to 'sys/src/9/pc/sdiahci.c')
| -rw-r--r-- | sys/src/9/pc/sdiahci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/9/pc/sdiahci.c b/sys/src/9/pc/sdiahci.c index 8db494b42..6657785df 100644 --- a/sys/src/9/pc/sdiahci.c +++ b/sys/src/9/pc/sdiahci.c @@ -1201,7 +1201,7 @@ iainterrupt(Ureg *u, void *a) 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); |