* [PATCH] mwifiex: add module parameter to disable 40MHZ support in 2.4G band
@ 2017-08-03 9:06 Xinming Hu
2017-08-03 9:26 ` Kalle Valo
0 siblings, 1 reply; 5+ messages in thread
From: Xinming Hu @ 2017-08-03 9:06 UTC (permalink / raw)
To: Linux Wireless
Cc: Kalle Valo, Brian Norris, Dmitry Torokhov, rajatja, Zhiyuan Yang,
Tim Song, Cathy Luo, Ganapathi Bhat, Xinming Hu
From: Xinming Hu <huxm@marvell.com>
This patch provide a new module parameter disable_2g4_40m, with
which driver will not report 40M capability for 2.4GHZ to cfg80211.
Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Ganapathi Bhat <gbhat@marvell.com>
---
drivers/net/wireless/marvell/mwifiex/cfg80211.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index 2be7817..820475a 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -25,6 +25,10 @@
static char *reg_alpha2;
module_param(reg_alpha2, charp, 0);
+static bool disable_2g4_40m;
+module_param(disable_2g4_40m, bool, 0000);
+MODULE_PARM_DESC(disable_2g4_40m, "2.4G 40M support disable:1, enable:0");
+
static const struct ieee80211_iface_limit mwifiex_ap_sta_limits[] = {
{
.max = 3, .types = BIT(NL80211_IFTYPE_STATION) |
@@ -2755,7 +2759,7 @@ static void mwifiex_setup_vht_caps(struct ieee80211_sta_vht_cap *vht_info,
*/
static void
mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
- struct mwifiex_private *priv)
+ struct mwifiex_private *priv, int disable_40m)
{
int rx_mcs_supp;
struct ieee80211_mcs_info mcs_set;
@@ -2769,7 +2773,7 @@ static void mwifiex_setup_vht_caps(struct ieee80211_sta_vht_cap *vht_info,
memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
/* Fill HT capability information */
- if (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
+ if (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap) && !disable_40m)
ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
else
ht_info->cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
@@ -2779,7 +2783,7 @@ static void mwifiex_setup_vht_caps(struct ieee80211_sta_vht_cap *vht_info,
else
ht_info->cap &= ~IEEE80211_HT_CAP_SGI_20;
- if (ISSUPP_SHORTGI40(adapter->hw_dot_11n_dev_cap))
+ if (ISSUPP_SHORTGI40(adapter->hw_dot_11n_dev_cap) && !disable_40m)
ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
else
ht_info->cap &= ~IEEE80211_HT_CAP_SGI_40;
@@ -2799,7 +2803,8 @@ static void mwifiex_setup_vht_caps(struct ieee80211_sta_vht_cap *vht_info,
else
ht_info->cap &= ~IEEE80211_HT_CAP_GRN_FLD;
- if (ISENABLED_40MHZ_INTOLERANT(adapter->hw_dot_11n_dev_cap))
+ if (ISENABLED_40MHZ_INTOLERANT(adapter->hw_dot_11n_dev_cap) &&
+ !disable_40m)
ht_info->cap |= IEEE80211_HT_CAP_40MHZ_INTOLERANT;
else
ht_info->cap &= ~IEEE80211_HT_CAP_40MHZ_INTOLERANT;
@@ -2819,7 +2824,7 @@ static void mwifiex_setup_vht_caps(struct ieee80211_sta_vht_cap *vht_info,
memset(&mcs[rx_mcs_supp], 0,
sizeof(struct ieee80211_mcs_info) - rx_mcs_supp);
if (priv->bss_mode == NL80211_IFTYPE_STATION ||
- ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
+ (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap) && !disable_40m))
/* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
SETHT_MCS32(mcs_set.rx_mask);
@@ -2974,14 +2979,15 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
if (ret)
goto err_sta_init;
- mwifiex_setup_ht_caps(&wiphy->bands[NL80211_BAND_2GHZ]->ht_cap, priv);
- if (adapter->is_hw_11ac_capable)
+ mwifiex_setup_ht_caps(&wiphy->bands[NL80211_BAND_2GHZ]->ht_cap, priv,
+ disable_2g4_40m);
+ if (adapter->is_hw_11ac_capable && !disable_2g4_40m)
mwifiex_setup_vht_caps(
&wiphy->bands[NL80211_BAND_2GHZ]->vht_cap, priv);
if (adapter->config_bands & BAND_A)
mwifiex_setup_ht_caps(
- &wiphy->bands[NL80211_BAND_5GHZ]->ht_cap, priv);
+ &wiphy->bands[NL80211_BAND_5GHZ]->ht_cap, priv, 0);
if ((adapter->config_bands & BAND_A) && adapter->is_hw_11ac_capable)
mwifiex_setup_vht_caps(
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] mwifiex: add module parameter to disable 40MHZ support in 2.4G band
2017-08-03 9:06 [PATCH] mwifiex: add module parameter to disable 40MHZ support in 2.4G band Xinming Hu
@ 2017-08-03 9:26 ` Kalle Valo
2017-08-03 9:49 ` Arend van Spriel
0 siblings, 1 reply; 5+ messages in thread
From: Kalle Valo @ 2017-08-03 9:26 UTC (permalink / raw)
To: Xinming Hu
Cc: Linux Wireless, Brian Norris, Dmitry Torokhov, rajatja,
Zhiyuan Yang, Tim Song, Cathy Luo, Ganapathi Bhat, Xinming Hu
Xinming Hu <huxinming820@gmail.com> writes:
> From: Xinming Hu <huxm@marvell.com>
>
> This patch provide a new module parameter disable_2g4_40m, with
> which driver will not report 40M capability for 2.4GHZ to cfg80211.
>
> Signed-off-by: Xinming Hu <huxm@marvell.com>
> Signed-off-by: Cathy Luo <cluo@marvell.com>
> Signed-off-by: Ganapathi Bhat <gbhat@marvell.com>
> ---
> drivers/net/wireless/marvell/mwifiex/cfg80211.c | 22 ++++++++++++++--------
> 1 file changed, 14 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
> index 2be7817..820475a 100644
> --- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
> +++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
> @@ -25,6 +25,10 @@
> static char *reg_alpha2;
> module_param(reg_alpha2, charp, 0);
>
> +static bool disable_2g4_40m;
> +module_param(disable_2g4_40m, bool, 0000);
This is bool, good.
> +MODULE_PARM_DESC(disable_2g4_40m, "2.4G 40M support disable:1, enable:0");
This is not really a readable description for someone not familiar with
Wi-Fi, maybe this instead:
"disable 40 Mhz channels on 2.4 GHz band (disable:1, enable:0)"
> @@ -2755,7 +2759,7 @@ static void mwifiex_setup_vht_caps(struct ieee80211_sta_vht_cap *vht_info,
> */
> static void
> mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
> - struct mwifiex_private *priv)
> + struct mwifiex_private *priv, int disable_40m)
But here you use int, that's a bit strange. Why not bool?
--
Kalle Valo
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] mwifiex: add module parameter to disable 40MHZ support in 2.4G band
2017-08-03 9:26 ` Kalle Valo
@ 2017-08-03 9:49 ` Arend van Spriel
2017-08-03 9:59 ` Kalle Valo
0 siblings, 1 reply; 5+ messages in thread
From: Arend van Spriel @ 2017-08-03 9:49 UTC (permalink / raw)
To: Kalle Valo, Xinming Hu
Cc: Linux Wireless, Brian Norris, Dmitry Torokhov, rajatja,
Zhiyuan Yang, Tim Song, Cathy Luo, Ganapathi Bhat, Xinming Hu
On 03-08-17 11:26, Kalle Valo wrote:
> Xinming Hu <huxinming820@gmail.com> writes:
>
>> From: Xinming Hu <huxm@marvell.com>
>>
>> This patch provide a new module parameter disable_2g4_40m, with
>> which driver will not report 40M capability for 2.4GHZ to cfg80211.
>>
>> Signed-off-by: Xinming Hu <huxm@marvell.com>
>> Signed-off-by: Cathy Luo <cluo@marvell.com>
>> Signed-off-by: Ganapathi Bhat <gbhat@marvell.com>
>> ---
>> drivers/net/wireless/marvell/mwifiex/cfg80211.c | 22 ++++++++++++++--------
>> 1 file changed, 14 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
>> index 2be7817..820475a 100644
>> --- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
>> +++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
>> @@ -25,6 +25,10 @@
>> static char *reg_alpha2;
>> module_param(reg_alpha2, charp, 0);
>>
>> +static bool disable_2g4_40m;
>> +module_param(disable_2g4_40m, bool, 0000);
>
> This is bool, good.
>
>> +MODULE_PARM_DESC(disable_2g4_40m, "2.4G 40M support disable:1, enable:0");
>
> This is not really a readable description for someone not familiar with
> Wi-Fi, maybe this instead:
>
> "disable 40 Mhz channels on 2.4 GHz band (disable:1, enable:0)"
>
>> @@ -2755,7 +2759,7 @@ static void mwifiex_setup_vht_caps(struct ieee80211_sta_vht_cap *vht_info,
>> */
>> static void
>> mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
>> - struct mwifiex_private *priv)
>> + struct mwifiex_private *priv, int disable_40m)
>
> But here you use int, that's a bit strange. Why not bool?
Here is what is in net/wireless/core.c:
static bool cfg80211_disable_40mhz_24ghz;
module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
"Disable 40MHz support in the 2.4GHz band");
which seems exactly the same thing and ends up doing:
/*
* Since cfg80211_disable_40mhz_24ghz is global, we can
* modify the sband's ht data even if the driver uses a
* global structure for that.
*/
if (cfg80211_disable_40mhz_24ghz &&
band == NL80211_BAND_2GHZ &&
sband->ht_cap.ht_supported) {
sband->ht_cap.cap &=
~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
}
Regards,
Arend
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] mwifiex: add module parameter to disable 40MHZ support in 2.4G band
2017-08-03 9:49 ` Arend van Spriel
@ 2017-08-03 9:59 ` Kalle Valo
2017-08-03 10:26 ` Xinming Hu
0 siblings, 1 reply; 5+ messages in thread
From: Kalle Valo @ 2017-08-03 9:59 UTC (permalink / raw)
To: Arend van Spriel
Cc: Xinming Hu, Linux Wireless, Brian Norris, Dmitry Torokhov,
rajatja, Zhiyuan Yang, Tim Song, Cathy Luo, Ganapathi Bhat,
Xinming Hu
Arend van Spriel <arend.vanspriel@broadcom.com> writes:
> On 03-08-17 11:26, Kalle Valo wrote:
>> Xinming Hu <huxinming820@gmail.com> writes:
>>
>>> From: Xinming Hu <huxm@marvell.com>
>>>
>>> This patch provide a new module parameter disable_2g4_40m, with
>>> which driver will not report 40M capability for 2.4GHZ to cfg80211.
>>>
>>> Signed-off-by: Xinming Hu <huxm@marvell.com>
>>> Signed-off-by: Cathy Luo <cluo@marvell.com>
>>> Signed-off-by: Ganapathi Bhat <gbhat@marvell.com>
>>> ---
>>> drivers/net/wireless/marvell/mwifiex/cfg80211.c | 22 ++++++++++++++--------
>>> 1 file changed, 14 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
>>> b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
>>> index 2be7817..820475a 100644
>>> --- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
>>> +++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
>>> @@ -25,6 +25,10 @@
>>> static char *reg_alpha2;
>>> module_param(reg_alpha2, charp, 0);
>>>
>>> +static bool disable_2g4_40m;
>>> +module_param(disable_2g4_40m, bool, 0000);
>>
>> This is bool, good.
>>
>>> +MODULE_PARM_DESC(disable_2g4_40m, "2.4G 40M support disable:1, enable:0");
>>
>> This is not really a readable description for someone not familiar with
>> Wi-Fi, maybe this instead:
>>
>> "disable 40 Mhz channels on 2.4 GHz band (disable:1, enable:0)"
>>
>>> @@ -2755,7 +2759,7 @@ static void mwifiex_setup_vht_caps(struct ieee80211_sta_vht_cap *vht_info,
>>> */
>>> static void
>>> mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
>>> - struct mwifiex_private *priv)
>>> + struct mwifiex_private *priv, int disable_40m)
>>
>> But here you use int, that's a bit strange. Why not bool?
>
> Here is what is in net/wireless/core.c:
>
> static bool cfg80211_disable_40mhz_24ghz;
> module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
> MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
> "Disable 40MHz support in the 2.4GHz band");
>
> which seems exactly the same thing and ends up doing:
>
> /*
> * Since cfg80211_disable_40mhz_24ghz is global, we can
> * modify the sband's ht data even if the driver uses a
> * global structure for that.
> */
> if (cfg80211_disable_40mhz_24ghz &&
> band == NL80211_BAND_2GHZ &&
> sband->ht_cap.ht_supported) {
> sband->ht_cap.cap &=
> ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
> sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
> }
Good catch! So the module parameter for the driver is not needed, right?
--
Kalle Valo
^ permalink raw reply [flat|nested] 5+ messages in thread
* RE: [PATCH] mwifiex: add module parameter to disable 40MHZ support in 2.4G band
2017-08-03 9:59 ` Kalle Valo
@ 2017-08-03 10:26 ` Xinming Hu
0 siblings, 0 replies; 5+ messages in thread
From: Xinming Hu @ 2017-08-03 10:26 UTC (permalink / raw)
To: Kalle Valo, Arend van Spriel
Cc: Xinming Hu, Linux Wireless, Brian Norris, Dmitry Torokhov,
rajatja, Zhiyuan Yang, Tim Song, Cathy Luo, Ganapathi Bhat
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2017-08-03 10:26 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-08-03 9:06 [PATCH] mwifiex: add module parameter to disable 40MHZ support in 2.4G band Xinming Hu
2017-08-03 9:26 ` Kalle Valo
2017-08-03 9:49 ` Arend van Spriel
2017-08-03 9:59 ` Kalle Valo
2017-08-03 10:26 ` Xinming Hu
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