diff options
| author | Seth Forshee <seth.forshee@canonical.com> | 2012-11-15 18:07:53 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-11-20 23:03:37 +0400 |
| commit | 05f8a6160491ea46636370fbacb4061c341d5d94 (patch) | |
| tree | e59eb3ae6def081b7b67dd31d2a44f91f8de0d61 /drivers/net/wireless/brcm80211/brcmsmac/dma.c | |
| parent | 5c8067caeecbabf8c60dbb73dd517d2a2aad16a5 (diff) | |
| download | linux-05f8a6160491ea46636370fbacb4061c341d5d94.tar.xz | |
brcmsmac: Add helper function for updating txavail count
Use this helper function rather than open-coding the same calculation in
multiple places.
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>
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmsmac/dma.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmsmac/dma.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/dma.c b/drivers/net/wireless/brcm80211/brcmsmac/dma.c index 5e53305bd9a9..6444cf1a2eb8 100644 --- a/drivers/net/wireless/brcm80211/brcmsmac/dma.c +++ b/drivers/net/wireless/brcm80211/brcmsmac/dma.c @@ -1264,6 +1264,17 @@ bool dma_rxreset(struct dma_pub *pub) return status == D64_RS0_RS_DISABLED; } +/* Update count of available tx descriptors based on current DMA state */ +static void dma_update_txavail(struct dma_info *di) +{ + /* + * Available space is number of descriptors less the number of + * active descriptors and the number of queued AMPDU frames. + */ + di->dma.txavail = di->ntxd - ntxdactive(di, di->txin, di->txout) - 1; +} + + /* * !! tx entry routine * WARNING: call must check the return value for error. @@ -1325,7 +1336,7 @@ int dma_txfast(struct dma_pub *pub, struct sk_buff *p, bool commit) di->xmtptrbase + I2B(txout, struct dma64desc)); /* tx flow control */ - di->dma.txavail = di->ntxd - ntxdactive(di, di->txin, di->txout) - 1; + dma_update_txavail(di); return 0; @@ -1412,7 +1423,7 @@ struct sk_buff *dma_getnexttxp(struct dma_pub *pub, enum txd_range range) di->txin = i; /* tx flow control */ - di->dma.txavail = di->ntxd - ntxdactive(di, di->txin, di->txout) - 1; + dma_update_txavail(di); return txp; |