2021-05-03 11:34:46

by Michal Suchánek

Subject: [PATCH] ibmvnic: remove default label from to_string switch

This way the compiler warns when a new value is added to the enum but
not the string transation like:

drivers/net/ethernet/ibm/ibmvnic.c: In function 'adapter_state_to_string':
drivers/net/ethernet/ibm/ibmvnic.c:832:2: warning: enumeration value 'VNIC_FOOBAR' not handled in switch [-Wswitch]
switch (state) {
^~~~~~
drivers/net/ethernet/ibm/ibmvnic.c: In function 'reset_reason_to_string':
drivers/net/ethernet/ibm/ibmvnic.c:1935:2: warning: enumeration value 'VNIC_RESET_FOOBAR' not handled in switch [-Wswitch]
switch (reason) {
^~~~~~

Signed-off-by: Michal Suchanek <[email protected]>
---
drivers/net/ethernet/ibm/ibmvnic.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 5788bb956d73..4d439413f6d9 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -846,9 +846,8 @@ static const char *adapter_state_to_string(enum vnic_state state)
return "REMOVING";
case VNIC_REMOVED:
return "REMOVED";
- default:
- return "UNKNOWN";
}
+ return "UNKNOWN";
}

static int ibmvnic_login(struct net_device *netdev)
@@ -1946,9 +1945,8 @@ static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason)
return "TIMEOUT";
case VNIC_RESET_CHANGE_PARAM:
return "CHANGE_PARAM";
- default:
- return "UNKNOWN";
}
+ return "UNKNOWN";
}

/*
--
2.26.2

2021-05-03 18:23:12

by Lijun Pan

Subject: Re: [PATCH] ibmvnic: remove default label from to_string switch

On Mon, May 3, 2021 at 5:54 AM Michal Suchanek <[email protected]> wrote:
>
> This way the compiler warns when a new value is added to the enum but
> not the string transation like:

s/transation/translation/

This trick works.
Since the original code does not generate gcc warnings/errors, should
this patch be sent to net-next as an improvement?

>
> drivers/net/ethernet/ibm/ibmvnic.c: In function 'adapter_state_to_string':
> drivers/net/ethernet/ibm/ibmvnic.c:832:2: warning: enumeration value 'VNIC_FOOBAR' not handled in switch [-Wswitch]
> switch (state) {
> ^~~~~~
> drivers/net/ethernet/ibm/ibmvnic.c: In function 'reset_reason_to_string':
> drivers/net/ethernet/ibm/ibmvnic.c:1935:2: warning: enumeration value 'VNIC_RESET_FOOBAR' not handled in switch [-Wswitch]
> switch (reason) {
> ^~~~~~
>
> Signed-off-by: Michal Suchanek <[email protected]>
> ---

Acked-by: Lijun Pan <[email protected]>

> drivers/net/ethernet/ibm/ibmvnic.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
> index 5788bb956d73..4d439413f6d9 100644
> --- a/drivers/net/ethernet/ibm/ibmvnic.c
> +++ b/drivers/net/ethernet/ibm/ibmvnic.c
> @@ -846,9 +846,8 @@ static const char *adapter_state_to_string(enum vnic_state state)
> return "REMOVING";
> case VNIC_REMOVED:
> return "REMOVED";
> - default:
> - return "UNKNOWN";
> }
> + return "UNKNOWN";
> }
>
> static int ibmvnic_login(struct net_device *netdev)
> @@ -1946,9 +1945,8 @@ static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason)
> return "TIMEOUT";
> case VNIC_RESET_CHANGE_PARAM:
> return "CHANGE_PARAM";
> - default:
> - return "UNKNOWN";
> }
> + return "UNKNOWN";
> }
>
> /*
> --
> 2.26.2
>

2021-05-03 20:50:10

by David Miller

Subject: Re: [PATCH] ibmvnic: remove default label from to_string switch

From: Lijun Pan <[email protected]>
Date: Mon, 3 May 2021 13:21:00 -0500

> On Mon, May 3, 2021 at 5:54 AM Michal Suchanek <[email protected]> wrote:
>>
>> This way the compiler warns when a new value is added to the enum but
>> not the string transation like:
>
> s/transation/translation/
>
> This trick works.
> Since the original code does not generate gcc warnings/errors, should
> this patch be sent to net-next as an improvement?

Yes.

2021-05-04 05:45:19

by Michal Suchánek

Subject: [PATCH v2 net-next] ibmvnic: remove default label from to_string switch

This way the compiler warns when a new value is added to the enum but
not to the string translation like:

drivers/net/ethernet/ibm/ibmvnic.c: In function 'adapter_state_to_string':
drivers/net/ethernet/ibm/ibmvnic.c:832:2: warning: enumeration value 'VNIC_FOOBAR' not handled in switch [-Wswitch]
switch (state) {
^~~~~~
drivers/net/ethernet/ibm/ibmvnic.c: In function 'reset_reason_to_string':
drivers/net/ethernet/ibm/ibmvnic.c:1935:2: warning: enumeration value 'VNIC_RESET_FOOBAR' not handled in switch [-Wswitch]
switch (reason) {
^~~~~~

Signed-off-by: Michal Suchanek <[email protected]>
---
v2: Fix typo in commit message
---
drivers/net/ethernet/ibm/ibmvnic.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 5788bb956d73..4d439413f6d9 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -846,9 +846,8 @@ static const char *adapter_state_to_string(enum vnic_state state)
return "REMOVING";
case VNIC_REMOVED:
return "REMOVED";
- default:
- return "UNKNOWN";
}
+ return "UNKNOWN";
}

static int ibmvnic_login(struct net_device *netdev)
@@ -1946,9 +1945,8 @@ static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason)
return "TIMEOUT";
case VNIC_RESET_CHANGE_PARAM:
return "CHANGE_PARAM";
- default:
- return "UNKNOWN";
}
+ return "UNKNOWN";
}

/*
--
2.26.2

2021-05-04 19:20:55

by Michal Suchánek

Subject: [PATCH v2 net-next resend] ibmvnic: remove default label from to_string switch

This way the compiler warns when a new value is added to the enum but
not to the string translation like:

drivers/net/ethernet/ibm/ibmvnic.c: In function 'adapter_state_to_string':
drivers/net/ethernet/ibm/ibmvnic.c:832:2: warning: enumeration value 'VNIC_FOOBAR' not handled in switch [-Wswitch]
switch (state) {
^~~~~~
drivers/net/ethernet/ibm/ibmvnic.c: In function 'reset_reason_to_string':
drivers/net/ethernet/ibm/ibmvnic.c:1935:2: warning: enumeration value 'VNIC_RESET_FOOBAR' not handled in switch [-Wswitch]
switch (reason) {
^~~~~~

Signed-off-by: Michal Suchanek <[email protected]>
Acked-by: Lijun Pan <[email protected]>
---
v2: Fix typo in commit message
---
drivers/net/ethernet/ibm/ibmvnic.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 5788bb956d73..4d439413f6d9 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -846,9 +846,8 @@ static const char *adapter_state_to_string(enum vnic_state state)
return "REMOVING";
case VNIC_REMOVED:
return "REMOVED";
- default:
- return "UNKNOWN";
}
+ return "UNKNOWN";
}

static int ibmvnic_login(struct net_device *netdev)
@@ -1946,9 +1945,8 @@ static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason)
return "TIMEOUT";
case VNIC_RESET_CHANGE_PARAM:
return "CHANGE_PARAM";
- default:
- return "UNKNOWN";
}
+ return "UNKNOWN";
}

/*
--
2.26.2

2021-05-04 19:42:34

by Lijun Pan

Subject: Re: [PATCH v2 net-next resend] ibmvnic: remove default label from to_string switch

On Tue, May 4, 2021 at 2:19 PM Michal Suchanek <[email protected]> wrote:
>
> This way the compiler warns when a new value is added to the enum but
> not to the string translation like:
>
> drivers/net/ethernet/ibm/ibmvnic.c: In function 'adapter_state_to_string':
> drivers/net/ethernet/ibm/ibmvnic.c:832:2: warning: enumeration value 'VNIC_FOOBAR' not handled in switch [-Wswitch]
> switch (state) {
> ^~~~~~
> drivers/net/ethernet/ibm/ibmvnic.c: In function 'reset_reason_to_string':
> drivers/net/ethernet/ibm/ibmvnic.c:1935:2: warning: enumeration value 'VNIC_RESET_FOOBAR' not handled in switch [-Wswitch]
> switch (reason) {
> ^~~~~~
>
> Signed-off-by: Michal Suchanek <[email protected]>
> Acked-by: Lijun Pan <[email protected]>
> ---
> v2: Fix typo in commit message
> ---

Hi Michal,

Thank you for reposting the patch and including the Ack-by tag. I
think you need to wait till next Tuesday or so when net-next reopens,
then you can repost the patch.
http://vger.kernel.org/~davem/net-next.html.

Thanks,
Lijun