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b43: Add slot count compiletime assertion

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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>
This commit is contained in:
Michael Buesch 2009-02-20 12:24:52 +01:00 committed by John W. Linville
parent 20977d3e68
commit 2d071ca50e
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/b43/dma.c
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@ -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);