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authorAndres Salomon <dilinger@collabora.co.uk>2010-02-25 19:18:47 -0500
committerJohn W. Linville <linville@tuxdriver.com>2010-03-10 17:09:40 -0500
commitc2ef355bf3ef0b8006b96128726684fba47ac928 (patch)
treef2c483da2b117cc708d7d7bce355012a27e3cc67 /net
parent1da3f88222579135569ad52d1c82a7393cf87178 (diff)
downloadlinux-c2ef355bf3ef0b8006b96128726684fba47ac928.tar.bz2
mac80211: give warning if building w/out rate ctrl algorithm
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> Cc: stable@kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/Kconfig9
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