korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-30 15:44:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

virtio: fixes on top of 4.4-rc5

Browse Source 
This includes a single fix for virtio ccw error handling.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQEcBAABAgAGBQJWdmeoAAoJECgfDbjSjVRpArwIAKuaWLdfu6Aj25QkiENb5PFu
 JghRoy8P1SdGTqNdjbvG1XkxI072rWfrvU+cmVx9GbeZgusWtbeiTeBNT/jXnH/5
 hodG9YdUEZOh2WhROQ+Fo7t1vzqvBWHuU9YdrBnHDbdFQ8300CgNTOsdih2rlEfT
 t5/R3BEE0DXGTXTc3vO35+DVXzX8PA2FD18W7trrAjN7M5DdhCu98Q2VcvMZY/D6
 aSBDPMJZxR0YcRPE97w0dZMLePCYkfmoLryVCVVXm5VZq6zXc7Dhm6ND0/oH+0DB
 f4jxjapNUy+RAmE378ACsVwT992TTk49ZGZjbt4ttGOfFYDTrErrDkCq9QaZX7o=
 =xgGU
 -----END PGP SIGNATURE-----

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio fix from Michael Tsirkin:
 "This includes a single fix for virtio ccw error handling"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio/s390: handle error values in irb
This commit is contained in:
Linus Torvalds 2015-12-22 15:37:19 -08:00
commit ea82813190
1 changed files with 39 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

66
drivers/s390/virtio/virtio_ccw.c
View File

@ -984,32 +984,9 @@ static struct virtqueue *virtio_ccw_vq_by_ind(struct virtio_ccw_device *vcdev,
return vq;
}
static void virtio_ccw_int_handler(struct ccw_device *cdev,
unsigned long intparm,
struct irb *irb)
static void virtio_ccw_check_activity(struct virtio_ccw_device *vcdev,
__u32 activity)
{
__u32 activity = intparm & VIRTIO_CCW_INTPARM_MASK;
struct virtio_ccw_device *vcdev = dev_get_drvdata(&cdev->dev);
int i;
struct virtqueue *vq;
if (!vcdev)
return;
/* Check if it's a notification from the host. */
if ((intparm == 0) &&
(scsw_stctl(&irb->scsw) ==
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))) {
/* OK */
}
if (irb_is_error(irb)) {
/* Command reject? */
if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
(irb->ecw[0] & SNS0_CMD_REJECT))
vcdev->err = -EOPNOTSUPP;
else
/* Map everything else to -EIO. */
vcdev->err = -EIO;
}
if (vcdev->curr_io & activity) {
switch (activity) {
case VIRTIO_CCW_DOING_READ_FEAT:
@ -1029,12 +1006,47 @@ static void virtio_ccw_int_handler(struct ccw_device *cdev,
break;
default:
/* don't know what to do... */
dev_warn(&cdev->dev, "Suspicious activity '%08x'\n",
activity);
dev_warn(&vcdev->cdev->dev,
"Suspicious activity '%08x'\n", activity);
WARN_ON(1);
break;
}
}
}
static void virtio_ccw_int_handler(struct ccw_device *cdev,
unsigned long intparm,
struct irb *irb)
{
__u32 activity = intparm & VIRTIO_CCW_INTPARM_MASK;
struct virtio_ccw_device *vcdev = dev_get_drvdata(&cdev->dev);
int i;
struct virtqueue *vq;
if (!vcdev)
return;
if (IS_ERR(irb)) {
vcdev->err = PTR_ERR(irb);
virtio_ccw_check_activity(vcdev, activity);
/* Don't poke around indicators, something's wrong. */
return;
}
/* Check if it's a notification from the host. */
if ((intparm == 0) &&
(scsw_stctl(&irb->scsw) ==
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))) {
/* OK */
}
if (irb_is_error(irb)) {
/* Command reject? */
if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
(irb->ecw[0] & SNS0_CMD_REJECT))
vcdev->err = -EOPNOTSUPP;
else
/* Map everything else to -EIO. */
vcdev->err = -EIO;
}
virtio_ccw_check_activity(vcdev, activity);
for_each_set_bit(i, &vcdev->indicators,
sizeof(vcdev->indicators) * BITS_PER_BYTE) {
/* The bit clear must happen before the vring kick. */