[PATCH iwl-net] i40e: Report MFS in decimal base instead of hex

[PATCH iwl-net] i40e: Report MFS in decimal base instead of hex

[Erwan Velu]

If the MFS is set below the default (0x2600), a warning message is
reported like the following :

	MFS for port 1 has been set below the default: 600

This message is a bit confusing as the number shown here (600) is in
fact an hexa number: 0x600 = 1536

Without any explicit "0x" prefix, this message is read like the MFS is
set to 600 bytes.

MFS, as per MTUs, are usually expressed in decimal base.

This commit reports both current and default MFS values in decimal
so it's less confusing for end-users.

A typical warning message looks like the following :

	MFS for port 1 (1536) has been set below the default (9728)

Signed-off-by: Erwan Velu <e.velu@criteo.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 85ecf2f3de18..9a142562db38 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -16106,8 +16106,8 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	val = FIELD_GET(I40E_PRTGL_SAH_MFS_MASK,
 			rd32(&pf->hw, I40E_PRTGL_SAH));
 	if (val < MAX_FRAME_SIZE_DEFAULT)
-		dev_warn(&pdev->dev, "MFS for port %x has been set below the default: %x\n",
-			 pf->hw.port, val);
+		dev_warn(&pdev->dev, "MFS for port %x (%d) has been set below the default (%d)\n",
+			 pf->hw.port, val, MAX_FRAME_SIZE_DEFAULT);
 
 	/* Add a filter to drop all Flow control frames from any VSI from being
 	 * transmitted. By doing so we stop a malicious VF from sending out
-- 
2.44.0

Re: [PATCH iwl-net] i40e: Report MFS in decimal base instead of hex

[Simon Horman]

On Tue, Mar 19, 2024 at 03:16:55PM +0100, Erwan Velu wrote:
> If the MFS is set below the default (0x2600), a warning message is
> reported like the following :
> 
> 	MFS for port 1 has been set below the default: 600
> 
> This message is a bit confusing as the number shown here (600) is in
> fact an hexa number: 0x600 = 1536
> 
> Without any explicit "0x" prefix, this message is read like the MFS is
> set to 600 bytes.
> 
> MFS, as per MTUs, are usually expressed in decimal base.
> 
> This commit reports both current and default MFS values in decimal
> so it's less confusing for end-users.
> 
> A typical warning message looks like the following :
> 
> 	MFS for port 1 (1536) has been set below the default (9728)
> 

Hi Erwan,

If this is for (iwl-)net, then it should probably have a Fixes tag.
I expect it is sufficient to respond to this email with an appropriate tag.

> Signed-off-by: Erwan Velu <e.velu@criteo.com>

That not withstanding, this looks good to me.

Reviewed-by: Simon Horman <horms@kernel.org>

...

RE: [Intel-wired-lan] [PATCH iwl-net] i40e: Report MFS in decimal base instead of hex

[Brelinski, Tony]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of
> Erwan Velu
> Sent: Tuesday, March 19, 2024 7:17 AM
> Cc: Velu, Erwan <e.velu@criteo.com>; linux-kernel@vger.kernel.org; Eric
> Dumazet <edumazet@google.com>; netdev@vger.kernel.org; Nguyen,
> Anthony L <anthony.l.nguyen@intel.com>; intel-wired-lan@lists.osuosl.org;
> Jakub Kicinski <kuba@kernel.org>; Paolo Abeni <pabeni@redhat.com>; David
> S. Miller <davem@davemloft.net>
> Subject: [Intel-wired-lan] [PATCH iwl-net] i40e: Report MFS in decimal base
> instead of hex
> 
> If the MFS is set below the default (0x2600), a warning message is reported
> like the following :
> 
> 	MFS for port 1 has been set below the default: 600
> 
> This message is a bit confusing as the number shown here (600) is in fact an
> hexa number: 0x600 = 1536
> 
> Without any explicit "0x" prefix, this message is read like the MFS is set to 600
> bytes.
> 
> MFS, as per MTUs, are usually expressed in decimal base.
> 
> This commit reports both current and default MFS values in decimal so it's less
> confusing for end-users.
> 
> A typical warning message looks like the following :
> 
> 	MFS for port 1 (1536) has been set below the default (9728)
> 
> Signed-off-by: Erwan Velu <e.velu@criteo.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_main.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Tested-by: Tony Brelinski <tony.brelinski@intel.com>