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authorMichael Buesch <mb@bu3sch.de>2009-02-20 12:24:52 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-02-27 14:52:50 -0500
commit2d071ca50e9f20bf0203a7e8dbb1c784934e324d (patch)
tree02038ba172ffe9e483f7f1839c74c4a926e9f3fe /drivers/net
parent20977d3e685abb8b84c385426c39de1fca0a58ac (diff)
b43: Add slot count compiletime assertion
This adds a compiletime assertion for a recently introduced assumption on the slot counts. The tx header cache handling code assumes that the TX slot count can be divided evenly by the number of TX slots per frame. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/wireless/b43/dma.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index 189b2ec1bac..c69b70e0a72 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -842,6 +842,9 @@ struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev,
#endif
if (for_tx) {
+ /* Assumption: B43_TXRING_SLOTS can be divided by TX_SLOTS_PER_FRAME */
+ BUILD_BUG_ON(B43_TXRING_SLOTS % TX_SLOTS_PER_FRAME != 0);
+
ring->txhdr_cache = kcalloc(ring->nr_slots / TX_SLOTS_PER_FRAME,
b43_txhdr_size(dev),
GFP_KERNEL);