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brcmsmac: Reduce number of entries in tx DMA rings

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Currently up to 256 frames can be queued for each DMA ring. This is
excessive, and now that we have better flow control we can get by with
less. Experimentation has shown 64 to work well.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Seth Forshee 2012-11-15 08:07:58 -06:00 committed by John W. Linville
parent b05618deb4
commit 75be3e24ee
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/brcm80211/brcmsmac/main.c
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@ -232,8 +232,8 @@
#define MAX_DMA_SEGS 4
/* Max # of entries in Tx FIFO based on 4kb page size */
#define NTXD 256
/* # of entries in Tx FIFO */
#define NTXD 64
/* Max # of entries in Rx FIFO based on 4kb page size */
#define NRXD 256