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* [PATCH v2] net/vmxnet3: fix a missing vmxnet3 register command
@ 2024-04-18  6:36 Ronak Doshi
  2024-04-19  8:35 ` Ferruh Yigit
  0 siblings, 1 reply; 3+ messages in thread
From: Ronak Doshi @ 2024-04-18  6:36 UTC (permalink / raw)
  To: Jochen Behrens, Ronak Doshi; +Cc: dev, Ronak Doshi, stable

Vmxnet3 uses capability registers to advertise the supported
capabilities of UPT device. It uses DCR0_REG command register
for this purpose. However, the register command enum misses
one command which technically is not used by dpdk vmxnet3
driver yet. This can cause issue for commands added later.

This patch fixes this issue by adding a reserved
command in its place.

Fixes: 5241d61bd865 ("net/vmxnet3: support capability registers")
Cc: stable@dpdk.org

Signed-off-by: Ronak Doshi <ronak.doshi@broadcom.com>
--
Change log
v2: fixed typo
---
 drivers/net/vmxnet3/base/vmxnet3_defs.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/vmxnet3/base/vmxnet3_defs.h b/drivers/net/vmxnet3/base/vmxnet3_defs.h
index 24c235876e..a6bb281d8d 100644
--- a/drivers/net/vmxnet3/base/vmxnet3_defs.h
+++ b/drivers/net/vmxnet3/base/vmxnet3_defs.h
@@ -126,6 +126,7 @@ typedef enum {
    VMXNET3_CMD_RESERVED7,
    VMXNET3_CMD_RESERVED8,
    VMXNET3_CMD_GET_MAX_QUEUES_CONF,
+   VMXNET3_CMD_RESERVED11,
    VMXNET3_CMD_GET_MAX_CAPABILITIES,
    VMXNET3_CMD_GET_DCR0_REG,
 } Vmxnet3_Cmd;
-- 
2.11.0


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH v2] net/vmxnet3: fix a missing vmxnet3 register command
  2024-04-18  6:36 [PATCH v2] net/vmxnet3: fix a missing vmxnet3 register command Ronak Doshi
@ 2024-04-19  8:35 ` Ferruh Yigit
  2024-04-22 17:48   ` Ronak Doshi
  0 siblings, 1 reply; 3+ messages in thread
From: Ferruh Yigit @ 2024-04-19  8:35 UTC (permalink / raw)
  To: Ronak Doshi, Jochen Behrens, Ronak Doshi; +Cc: dev, stable

On 4/18/2024 7:36 AM, Ronak Doshi wrote:
> Vmxnet3 uses capability registers to advertise the supported
> capabilities of UPT device. It uses DCR0_REG command register
> for this purpose. However, the register command enum misses
> one command which technically is not used by dpdk vmxnet3
> driver yet. This can cause issue for commands added later.
> 
> This patch fixes this issue by adding a reserved
> command in its place.
> 
> Fixes: 5241d61bd865 ("net/vmxnet3: support capability registers")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Ronak Doshi <ronak.doshi@broadcom.com>
> --
> Change log
> v2: fixed typo
> ---
>  drivers/net/vmxnet3/base/vmxnet3_defs.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/vmxnet3/base/vmxnet3_defs.h b/drivers/net/vmxnet3/base/vmxnet3_defs.h
> index 24c235876e..a6bb281d8d 100644
> --- a/drivers/net/vmxnet3/base/vmxnet3_defs.h
> +++ b/drivers/net/vmxnet3/base/vmxnet3_defs.h
> @@ -126,6 +126,7 @@ typedef enum {
>     VMXNET3_CMD_RESERVED7,
>     VMXNET3_CMD_RESERVED8,
>     VMXNET3_CMD_GET_MAX_QUEUES_CONF,
> +   VMXNET3_CMD_RESERVED11,
>     VMXNET3_CMD_GET_MAX_CAPABILITIES,
>     VMXNET3_CMD_GET_DCR0_REG,
>  } Vmxnet3_Cmd;

Hi Ronak,

Thank you for the patch.

What is the fixed from user perspective, what is the impact.

I can see two commands effected from missing enum, they are GET_DCR0_REG
& GET_MAX_CAPABILITIES.
Was user not able to read capabilities, or get random capabilities, from
device up until now?
If so what were these capabilities and how user impacted from missing them?
Can you please detail the impact more in the commit log?



^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH v2] net/vmxnet3: fix a missing vmxnet3 register command
  2024-04-19  8:35 ` Ferruh Yigit
@ 2024-04-22 17:48   ` Ronak Doshi
  0 siblings, 0 replies; 3+ messages in thread
From: Ronak Doshi @ 2024-04-22 17:48 UTC (permalink / raw)
  To: Ferruh Yigit; +Cc: Jochen Behrens, Ronak Doshi, dev, stable

[-- Attachment #1: Type: text/plain, Size: 2861 bytes --]

Basically it will just provide incorrect information. With the enum being
misaligned due to missing command, GET_DCR0_REG and GET_MAX_CAPABILITIES
will just lead to incorrect commands being issued.

Thanks,
Ronak


On Fri, Apr 19, 2024 at 1:35 AM Ferruh Yigit <ferruh.yigit@amd.com> wrote:

> On 4/18/2024 7:36 AM, Ronak Doshi wrote:
> > Vmxnet3 uses capability registers to advertise the supported
> > capabilities of UPT device. It uses DCR0_REG command register
> > for this purpose. However, the register command enum misses
> > one command which technically is not used by dpdk vmxnet3
> > driver yet. This can cause issue for commands added later.
> >
> > This patch fixes this issue by adding a reserved
> > command in its place.
> >
> > Fixes: 5241d61bd865 ("net/vmxnet3: support capability registers")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Ronak Doshi <ronak.doshi@broadcom.com>
> > --
> > Change log
> > v2: fixed typo
> > ---
> >  drivers/net/vmxnet3/base/vmxnet3_defs.h | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/net/vmxnet3/base/vmxnet3_defs.h
> b/drivers/net/vmxnet3/base/vmxnet3_defs.h
> > index 24c235876e..a6bb281d8d 100644
> > --- a/drivers/net/vmxnet3/base/vmxnet3_defs.h
> > +++ b/drivers/net/vmxnet3/base/vmxnet3_defs.h
> > @@ -126,6 +126,7 @@ typedef enum {
> >     VMXNET3_CMD_RESERVED7,
> >     VMXNET3_CMD_RESERVED8,
> >     VMXNET3_CMD_GET_MAX_QUEUES_CONF,
> > +   VMXNET3_CMD_RESERVED11,
> >     VMXNET3_CMD_GET_MAX_CAPABILITIES,
> >     VMXNET3_CMD_GET_DCR0_REG,
> >  } Vmxnet3_Cmd;
>
> Hi Ronak,
>
> Thank you for the patch.
>
> What is the fixed from user perspective, what is the impact.
>
> I can see two commands effected from missing enum, they are GET_DCR0_REG
> & GET_MAX_CAPABILITIES.
> Was user not able to read capabilities, or get random capabilities, from
> device up until now?
> If so what were these capabilities and how user impacted from missing them?
> Can you please detail the impact more in the commit log?
>
>
>

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^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2024-04-22 17:48 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2024-04-18  6:36 [PATCH v2] net/vmxnet3: fix a missing vmxnet3 register command Ronak Doshi
2024-04-19  8:35 ` Ferruh Yigit
2024-04-22 17:48   ` Ronak Doshi

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