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Subject: Re: [virtio] [PATCH] pci: strengthen requirement of the correct subsystem id


On 28.10.19 17:12, Michael S. Tsirkin wrote:
If a hardware implementation of virtio does not have
the correct subsystem id, then drivers can't report
ir properly, or detect and work around bugs.

s/ir/it.

Jan

Change the requirement from MAY to SHOULD.

We can't make it a MUST since we did not require this
historically.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
  content.tex | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/content.tex b/content.tex
index 4bcb728..8f1518c 100644
--- a/content.tex
+++ b/content.tex
@@ -562,7 +562,7 @@ \subsection{PCI Device Discovery}\label{sec:Virtio Transport Options / Virtio Ov
  For example, the network card device with the Virtio Device ID 1
  has the PCI Device ID 0x1041 or the Transitional PCI Device ID 0x1000.
-The PCI Subsystem Vendor ID and the PCI Subsystem Device ID MAY reflect
+The PCI Subsystem Vendor ID and the PCI Subsystem Device ID SHOULD reflect
  the PCI Vendor and Device ID of the environment (for informational purposes by the driver).
Non-transitional devices SHOULD have a PCI Device ID in the range


--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux


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