2014-05-13 13:47:36

by Johannes Berg

[permalink] [raw]
Subject: [PATCH 3.15] nl80211: fix NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL API

From: Johannes Berg <[email protected]>

My commit removing that also removed it from the header file
which can break compilation of userspace that needed it, add
it back for API/ABI compatibility purposes (but no code to
implement anything for it.)

Signed-off-by: Johannes Berg <[email protected]>
---
include/uapi/linux/nl80211.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 1ba9d626aa83..194c1eab04d8 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -3856,6 +3856,8 @@ enum nl80211_ap_sme_features {
* @NL80211_FEATURE_CELL_BASE_REG_HINTS: This driver has been tested
* to work properly to suppport receiving regulatory hints from
* cellular base stations.
+ * @NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL: (no longer available, only
+ * here to reserve the value for API/ABI compatibility)
* @NL80211_FEATURE_SAE: This driver supports simultaneous authentication of
* equals (SAE) with user space SME (NL80211_CMD_AUTHENTICATE) in station
* mode
@@ -3897,7 +3899,7 @@ enum nl80211_feature_flags {
NL80211_FEATURE_HT_IBSS = 1 << 1,
NL80211_FEATURE_INACTIVITY_TIMER = 1 << 2,
NL80211_FEATURE_CELL_BASE_REG_HINTS = 1 << 3,
- /* bit 4 is reserved - don't use */
+ NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL = 1 << 4,
NL80211_FEATURE_SAE = 1 << 5,
NL80211_FEATURE_LOW_PRIORITY_SCAN = 1 << 6,
NL80211_FEATURE_SCAN_FLUSH = 1 << 7,
--
2.0.0.rc0



2014-05-13 18:39:12

by Johannes Berg

[permalink] [raw]
Subject: Re: [PATCH 3.15] nl80211: fix NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL API

On Tue, 2014-05-13 at 13:39 -0400, John W. Linville wrote:
> Do we need to preserve the API compatibility?

Well, yes. Even iw uses this, and compiling it fails without it.

johannes


2014-05-13 17:45:13

by John W. Linville

[permalink] [raw]
Subject: Re: [PATCH 3.15] nl80211: fix NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL API

Do we need to preserve the API compatibility?

On Tue, May 13, 2014 at 03:47:28PM +0200, Johannes Berg wrote:
> From: Johannes Berg <[email protected]>
>
> My commit removing that also removed it from the header file
> which can break compilation of userspace that needed it, add
> it back for API/ABI compatibility purposes (but no code to
> implement anything for it.)
>
> Signed-off-by: Johannes Berg <[email protected]>
> ---
> include/uapi/linux/nl80211.h | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
> index 1ba9d626aa83..194c1eab04d8 100644
> --- a/include/uapi/linux/nl80211.h
> +++ b/include/uapi/linux/nl80211.h
> @@ -3856,6 +3856,8 @@ enum nl80211_ap_sme_features {
> * @NL80211_FEATURE_CELL_BASE_REG_HINTS: This driver has been tested
> * to work properly to suppport receiving regulatory hints from
> * cellular base stations.
> + * @NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL: (no longer available, only
> + * here to reserve the value for API/ABI compatibility)
> * @NL80211_FEATURE_SAE: This driver supports simultaneous authentication of
> * equals (SAE) with user space SME (NL80211_CMD_AUTHENTICATE) in station
> * mode
> @@ -3897,7 +3899,7 @@ enum nl80211_feature_flags {
> NL80211_FEATURE_HT_IBSS = 1 << 1,
> NL80211_FEATURE_INACTIVITY_TIMER = 1 << 2,
> NL80211_FEATURE_CELL_BASE_REG_HINTS = 1 << 3,
> - /* bit 4 is reserved - don't use */
> + NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL = 1 << 4,
> NL80211_FEATURE_SAE = 1 << 5,
> NL80211_FEATURE_LOW_PRIORITY_SCAN = 1 << 6,
> NL80211_FEATURE_SCAN_FLUSH = 1 << 7,
> --
> 2.0.0.rc0
>
> --
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--
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