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authorAlan Brady <alan.brady@intel.com>2017-10-12 00:49:43 +0300
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2017-10-14 00:27:13 +0300
commit17a9422de78c3a59b490b400f555635c477f1476 (patch)
tree0ff591f465bceac88b9a28bc499253ea0d70189e /include/linux/avf
parent8fdb69dd383f1f937f7e2f1f24efe97c5268a84c (diff)
downloadlinux-17a9422de78c3a59b490b400f555635c477f1476.tar.xz
i40e/i40evf: don't trust VF to reset itself
When using 'ethtool -L' on a VF to change number of requested queues from PF, we shouldn't trust the VF to reset itself after making the request. Doing it that way opens the door for a potentially malicious VF to do nasty things to the PF which should never be the case. This makes it such that after VF makes a successful request, PF will then reset the VF to institute required changes. Only if the request fails will PF send a message back to VF letting it know the request was unsuccessful. Testing-hints: There should be no real functional changes. This is simply hardening against a potentially malicious VF. Signed-off-by: Alan Brady <alan.brady@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'include/linux/avf')
-rw-r--r--include/linux/avf/virtchnl.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/avf/virtchnl.h b/include/linux/avf/virtchnl.h
index 60e5d90cb18a..3ce61342fa31 100644
--- a/include/linux/avf/virtchnl.h
+++ b/include/linux/avf/virtchnl.h
@@ -333,8 +333,8 @@ struct virtchnl_vsi_queue_config_info {
* additional queues must be negotiated. This is a best effort request as it
* is possible the PF does not have enough queues left to support the request.
* If the PF cannot support the number requested it will respond with the
- * maximum number it is able to support; otherwise it will respond with the
- * number requested.
+ * maximum number it is able to support. If the request is successful, PF will
+ * then reset the VF to institute required changes.
*/
/* VF resource request */