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| author | Andres Salomon <dilinger@collabora.co.uk> | 2010-02-25 19:18:47 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-07-05 11:22:12 -0700 |
| commit | ba0a3584f651a904587e5b13856cfbc6d6ae7e44 (patch) | |
| tree | 800b3efa658127033cb42c776cfeddd904c041f1 /net | |
| parent | afbcfc2833a06d5b847f8c235059e2545bd5ad31 (diff) | |
| download | lwn-ba0a3584f651a904587e5b13856cfbc6d6ae7e44.tar.gz lwn-ba0a3584f651a904587e5b13856cfbc6d6ae7e44.zip | |
mac80211: give warning if building w/out rate ctrl algorithm
commit c2ef355bf3ef0b8006b96128726684fba47ac928 upstream.
I discovered that if EMBEDDED=y, one can accidentally build a mac80211 stack
and drivers w/ no rate control algorithm. For drivers like RTL8187 that don't
supply their own RC algorithms, this will cause ieee80211_register_hw to
fail (making the driver unusable).
This will tell kconfig to provide a warning if no rate control algorithms
have been selected. That'll at least warn the user; users that know that
their drivers supply a rate control algorithm can safely ignore the
warning, and those who don't know (or who expect to be using multiple
drivers) can select a default RC algorithm.
Signed-off-by: Andres Salomon <dilinger@collabora.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig index a952b7f8c648..334c359da5e8 100644 --- a/net/mac80211/Kconfig +++ b/net/mac80211/Kconfig @@ -15,8 +15,12 @@ comment "CFG80211 needs to be enabled for MAC80211" if MAC80211 != n +config MAC80211_HAS_RC + def_bool n + config MAC80211_RC_PID bool "PID controller based rate control algorithm" if EMBEDDED + select MAC80211_HAS_RC ---help--- This option enables a TX rate control algorithm for mac80211 that uses a PID controller to select the TX @@ -24,12 +28,14 @@ config MAC80211_RC_PID config MAC80211_RC_MINSTREL bool "Minstrel" if EMBEDDED + select MAC80211_HAS_RC default y ---help--- This option enables the 'minstrel' TX rate control algorithm choice prompt "Default rate control algorithm" + depends on MAC80211_HAS_RC default MAC80211_RC_DEFAULT_MINSTREL ---help--- This option selects the default rate control algorithm @@ -62,6 +68,9 @@ config MAC80211_RC_DEFAULT endif +comment "Some wireless drivers require a rate control algorithm" + depends on MAC80211_HAS_RC=n + config MAC80211_MESH bool "Enable mac80211 mesh networking (pre-802.11s) support" depends on MAC80211 && EXPERIMENTAL |