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[02/25] brcmfmac: minor optimization of brcmf_sdbrcm_txpkt() function

Message ID 1364985650-11719-3-git-send-email-arend@broadcom.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Arend van Spriel April 3, 2013, 10:40 a.m. UTC 
When taking care of packet alignment to 64-byte boundary padding may
be added between SDPCM header and CDC data. It clear both SDPCM header
space and padding space. Changed it to only clear padding space. In
filling the SDPCM header it uses unaligned access to set SDPCM software
header, but preceding code assures it is properly aligned.

Signed-off-by: Arend van Spriel <arend@broadcom.com>
Change-Id: Iad22f277f3496440ba4d2db771205714774570ac
Reviewed-on: http://lb-bun-88.bun.broadcom.com:8080/76
Reviewed-by: Franky Lin <frankyl@broadcom.com>
Reviewed-by: Piotr Haber <phaber@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
---
 drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
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Patch

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
index 535a5eb..4fa19b9 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
@@ -1813,8 +1813,7 @@  static int brcmf_sdbrcm_txpkt(struct brcmf_sdio *bus, struct sk_buff *pkt,
 		} else {
 			skb_push(pkt, pad);
 			frame = (u8 *) (pkt->data);
-			/* precondition: pad + SDPCM_HDRLEN <= pkt->len */
-			memset(frame, 0, pad + SDPCM_HDRLEN);
+			memset(frame + SDPCM_HDRLEN, 0, pad);
 		}
 	}
 	/* precondition: pad < BRCMF_SDALIGN */
@@ -1830,8 +1829,8 @@  static int brcmf_sdbrcm_txpkt(struct brcmf_sdio *bus, struct sk_buff *pkt,
 	    (((pad +
 	       SDPCM_HDRLEN) << SDPCM_DOFFSET_SHIFT) & SDPCM_DOFFSET_MASK);
 
-	put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
-	put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));
+	*(((__le32 *) frame) + 1) = cpu_to_le32(swheader);
+	*(((__le32 *) frame) + 2) = 0;
 
 #ifdef DEBUG
 	tx_packets[pkt->priority]++;