diff mbox

[v2,net,1/6] net: mvneta: add configuration for MBUS windows access protection

Message ID 1448561293-16431-2-git-send-email-mw@semihalf.com
State Superseded, archived
Delegated to: David Miller
Headers show

Commit Message

Marcin Wojtas Nov. 26, 2015, 6:08 p.m. UTC
This commit adds missing configuration of MBUS windows access protection
in mvneta_conf_mbus_windows function - a dedicated variable for that
purpose remained there unused since v3.8 initial mvneta support. Because
of that the register contents were inherited from the bootloader.

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: <stable@vger.kernel.org> # v3.8+
Fixes: c5aff18204da ("net: mvneta: driver for Marvell Armada 370/XP network
unit")
---
 drivers/net/ethernet/marvell/mvneta.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Thomas Petazzoni Nov. 26, 2015, 6:25 p.m. UTC | #1
Marcin,

On Thu, 26 Nov 2015 19:08:08 +0100, Marcin Wojtas wrote:
> This commit adds missing configuration of MBUS windows access protection
> in mvneta_conf_mbus_windows function - a dedicated variable for that
> purpose remained there unused since v3.8 initial mvneta support. Because
> of that the register contents were inherited from the bootloader.
> 
> Signed-off-by: Marcin Wojtas <mw@semihalf.com>
> Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
> Cc: <stable@vger.kernel.org> # v3.8+
> Fixes: c5aff18204da ("net: mvneta: driver for Marvell Armada 370/XP network
> unit")

Is this actually fixing a user visible problem? If not, then I am not
sure it qualifies for stable.

> diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
> index e84c7f2..c4327b9 100644
> --- a/drivers/net/ethernet/marvell/mvneta.c
> +++ b/drivers/net/ethernet/marvell/mvneta.c
> @@ -62,6 +62,7 @@
>  #define MVNETA_WIN_SIZE(w)                      (0x2204 + ((w) << 3))
>  #define MVNETA_WIN_REMAP(w)                     (0x2280 + ((w) << 2))
>  #define MVNETA_BASE_ADDR_ENABLE                 0x2290
> +#define MVNETA_ACCESS_PROTECT_ENABLE		0x2294

Spaces are used for indentation in the definitions of all other
constants in this driver, so I think you should stick with this
convention, at least to remain consistent.

>  #define MVNETA_PORT_CONFIG                      0x2400
>  #define      MVNETA_UNI_PROMISC_MODE            BIT(0)
>  #define      MVNETA_DEF_RXQ(q)                  ((q) << 1)
> @@ -3188,9 +3189,11 @@ static void mvneta_conf_mbus_windows(struct mvneta_port *pp,
>  
>  		win_enable &= ~(1 << i);
>  		win_protect |= 3 << (2 * i);
> +

Unneeded change.

>  	}
>  
>  	mvreg_write(pp, MVNETA_BASE_ADDR_ENABLE, win_enable);
> +	mvreg_write(pp, MVNETA_ACCESS_PROTECT_ENABLE, win_protect);
>  }

Thanks,

Thomas
Marcin Wojtas Nov. 26, 2015, 6:31 p.m. UTC | #2
Hi Thomas,

2015-11-26 19:25 GMT+01:00 Thomas Petazzoni
<thomas.petazzoni@free-electrons.com>:
> Marcin,
>
> On Thu, 26 Nov 2015 19:08:08 +0100, Marcin Wojtas wrote:
>> This commit adds missing configuration of MBUS windows access protection
>> in mvneta_conf_mbus_windows function - a dedicated variable for that
>> purpose remained there unused since v3.8 initial mvneta support. Because
>> of that the register contents were inherited from the bootloader.
>>
>> Signed-off-by: Marcin Wojtas <mw@semihalf.com>
>> Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
>> Cc: <stable@vger.kernel.org> # v3.8+
>> Fixes: c5aff18204da ("net: mvneta: driver for Marvell Armada 370/XP network
>> unit")
>
> Is this actually fixing a user visible problem? If not, then I am not
> sure it qualifies for stable.

Indeed, it's not fixing a visible thing, unless you resume from
suspend to ram. However, the original driver declares and updates
'win_protect ' variable, which have remained unused for past 3 years:)
If you think it's not worth cc'ing stable despite that, I will remove
the notification.

>
>> diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
>> index e84c7f2..c4327b9 100644
>> --- a/drivers/net/ethernet/marvell/mvneta.c
>> +++ b/drivers/net/ethernet/marvell/mvneta.c
>> @@ -62,6 +62,7 @@
>>  #define MVNETA_WIN_SIZE(w)                      (0x2204 + ((w) << 3))
>>  #define MVNETA_WIN_REMAP(w)                     (0x2280 + ((w) << 2))
>>  #define MVNETA_BASE_ADDR_ENABLE                 0x2290
>> +#define MVNETA_ACCESS_PROTECT_ENABLE         0x2294
>
> Spaces are used for indentation in the definitions of all other
> constants in this driver, so I think you should stick with this
> convention, at least to remain consistent.
>

Ok.

>>  #define MVNETA_PORT_CONFIG                      0x2400
>>  #define      MVNETA_UNI_PROMISC_MODE            BIT(0)
>>  #define      MVNETA_DEF_RXQ(q)                  ((q) << 1)
>> @@ -3188,9 +3189,11 @@ static void mvneta_conf_mbus_windows(struct mvneta_port *pp,
>>
>>               win_enable &= ~(1 << i);
>>               win_protect |= 3 << (2 * i);
>> +
>
> Unneeded change.
>

Indeed, my mistake.

Thanks,
Marcin
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diff mbox

Patch

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index e84c7f2..c4327b9 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -62,6 +62,7 @@ 
 #define MVNETA_WIN_SIZE(w)                      (0x2204 + ((w) << 3))
 #define MVNETA_WIN_REMAP(w)                     (0x2280 + ((w) << 2))
 #define MVNETA_BASE_ADDR_ENABLE                 0x2290
+#define MVNETA_ACCESS_PROTECT_ENABLE		0x2294
 #define MVNETA_PORT_CONFIG                      0x2400
 #define      MVNETA_UNI_PROMISC_MODE            BIT(0)
 #define      MVNETA_DEF_RXQ(q)                  ((q) << 1)
@@ -3188,9 +3189,11 @@  static void mvneta_conf_mbus_windows(struct mvneta_port *pp,
 
 		win_enable &= ~(1 << i);
 		win_protect |= 3 << (2 * i);
+
 	}
 
 	mvreg_write(pp, MVNETA_BASE_ADDR_ENABLE, win_enable);
+	mvreg_write(pp, MVNETA_ACCESS_PROTECT_ENABLE, win_protect);
 }
 
 /* Power up the port */