ilo-pona/xv6-65oo2
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Activity

The driver should free descriptors, not interrupt handler. This

Browse source 
avoids handler freeing descriptors before driver sees that the request
has completed.
This commit is contained in:
Frans Kaashoek 2019-07-30 08:13:03 -04:00
parent 5304310452
commit f1bb53c690
1 changed files with 3 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
kernel/virtio_disk.c
View file

@ -239,6 +239,9 @@ virtio_disk_rw(struct buf *b, int write)
sleep(b, &vdisk_lock);
}
info[idx[0]].b = 0;
free_chain(idx[0]);
release(&vdisk_lock);
}
@ -256,9 +259,6 @@ virtio_disk_intr()
info[id].status = 1;
wakeup(info[id].b);
info[id].b = 0;
free_chain(id);
used_idx = (used_idx + 1) % NUM;
}