hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

blkfront: do not create a PV cdrom device if xen_hvm_guest 

It is not possible to unplug emulated cdrom devices, and PV cdroms don't
handle media insert, eject and stream, so we are better off disabling PV
cdroms when running as a Xen HVM guest.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Stefano Stabellini 2010-07-29 14:53:16 +01:00 committed by Jeremy Fitzhardinge
parent c7f52cdc2f
commit b98a409b80
1 changed files with 24 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/block/xen-blkfront.c
View File

@ -738,21 +738,34 @@ static int blkfront_probe(struct xenbus_device *dev,
} }
} }
/* no unplug has been done: do not hook devices != xen vbds */ if (xen_hvm_domain()) {
if (xen_hvm_domain() && (xen_platform_pci_unplug & XEN_UNPLUG_IGNORE)) { char *type;
int major; int len;
/* no unplug has been done: do not hook devices != xen vbds */
if (xen_platform_pci_unplug & XEN_UNPLUG_IGNORE) {
int major;
if (!VDEV_IS_EXTENDED(vdevice)) if (!VDEV_IS_EXTENDED(vdevice))
major = BLKIF_MAJOR(vdevice); major = BLKIF_MAJOR(vdevice);
else else
major = XENVBD_MAJOR; major = XENVBD_MAJOR;
if (major != XENVBD_MAJOR) { if (major != XENVBD_MAJOR) {
printk(KERN_INFO printk(KERN_INFO
"%s: HVM does not support vbd %d as xen block device\n", "%s: HVM does not support vbd %d as xen block device\n",
__FUNCTION__, vdevice); __FUNCTION__, vdevice);
return -ENODEV;
}
}
/* do not create a PV cdrom device if we are an HVM guest */
type = xenbus_read(XBT_NIL, dev->nodename, "device-type", &len);
if (IS_ERR(type))
return -ENODEV;
if (strncmp(type, "cdrom", 5) == 0) {
kfree(type);
return -ENODEV; return -ENODEV;
} }
kfree(type);
} }
info = kzalloc(sizeof(*info), GFP_KERNEL); info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info) { if (!info) {