brcm80211: fmac: remove alignment check from brcmf_sdioh_request_buffer()

The check for alignment is not valid anymore and can be removed. The
function is collapsed with brcmf_sdioh_request_packet() as a consequence
because it did not add much functionality any longer.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Alwin Beukers <alwin@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c
index 2263d3c..ccb32c0 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c
@@ -229,44 +229,6 @@ brcmf_sdioh_request_data(struct brcmf_sdio_dev *sdiodev, uint write, bool fifo,
        return err_ret;
 }
 
-static int
-brcmf_sdioh_request_packet(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
-                          uint write, uint func, uint addr,
-                          struct sk_buff *pkt)
-{
-       bool fifo = (fix_inc == SDIOH_DATA_FIX);
-       int err_ret = 0;
-       uint pkt_len = pkt->len;
-
-       brcmf_dbg(TRACE, "Enter\n");
-
-       brcmf_pm_resume_wait(sdiodev, &sdiodev->request_packet_wait);
-       if (brcmf_pm_resume_error(sdiodev))
-               return -EIO;
-
-       /* Claim host controller */
-       sdio_claim_host(sdiodev->func[func]);
-
-       pkt_len += 3;
-       pkt_len &= 0xFFFFFFFC;
-
-       err_ret = brcmf_sdioh_request_data(sdiodev, write, fifo, func,
-                                          addr, pkt, pkt_len);
-       if (err_ret) {
-               brcmf_dbg(ERROR, "%s FAILED %p, addr=0x%05x, pkt_len=%d, ERR=0x%08x\n",
-                         write ? "TX" : "RX", pkt, addr, pkt_len, err_ret);
-       } else {
-               brcmf_dbg(TRACE, "%s xfr'd %p, addr=0x%05x, len=%d\n",
-                         write ? "TX" : "RX", pkt, addr, pkt_len);
-       }
-
-       /* Release host controller */
-       sdio_release_host(sdiodev->func[func]);
-
-       brcmf_dbg(TRACE, "Exit\n");
-       return err_ret;
-}
-
 int
 brcmf_sdioh_request_chain(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
                          uint write, uint func, uint addr,
@@ -317,26 +279,15 @@ brcmf_sdioh_request_chain(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
 }
 
 /*
- * This function takes a buffer or packet, and fixes everything up
- * so that in the end, a DMA-able packet is created.
- *
- * A buffer does not have an associated packet pointer,
- * and may or may not be aligned.
- * A packet may consist of a single packet, or a packet chain.
- * If it is a packet chain, then all the packets in the chain
- * must be properly aligned.
- *
- * If the packet data is not aligned, then there may only be
- * one packet, and in this case,  it is copied to a new
- * aligned packet.
- *
+ * This function takes a single DMA-able packet.
  */
 int brcmf_sdioh_request_buffer(struct brcmf_sdio_dev *sdiodev,
                               uint fix_inc, uint write, uint func, uint addr,
                               struct sk_buff *pkt)
 {
        int status;
-       struct sk_buff *mypkt = NULL;
+       uint pkt_len = pkt->len;
+       bool fifo = (fix_inc == SDIOH_DATA_FIX);
 
        brcmf_dbg(TRACE, "Enter\n");
 
@@ -347,40 +298,25 @@ int brcmf_sdioh_request_buffer(struct brcmf_sdio_dev *sdiodev,
        if (brcmf_pm_resume_error(sdiodev))
                return -EIO;
 
-       if (((ulong) (pkt->data) & DMA_ALIGN_MASK) != 0) {
-               /*
-                * Case 2: We have a packet, but it is unaligned.
-                * In this case, we cannot have a chain (pkt->next == NULL)
-                */
-               brcmf_dbg(DATA, "Creating aligned %s Packet, len=%d\n",
-                         write ? "TX" : "RX", pkt->len);
-               mypkt = brcmu_pkt_buf_get_skb(pkt->len);
-               if (!mypkt) {
-                       brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
-                                 pkt->len);
-                       return -EIO;
-               }
-
-               /* For a write, copy the buffer data into the packet. */
-               if (write)
-                       memcpy(mypkt->data, pkt->data, pkt->len);
-
-               status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
-                                                   func, addr, mypkt);
+       /* Claim host controller */
+       sdio_claim_host(sdiodev->func[func]);
 
-               /* For a read, copy the packet data back to the buffer. */
-               if (!write)
-                       memcpy(pkt->data, mypkt->data, mypkt->len);
+       pkt_len += 3;
+       pkt_len &= (uint)~3;
 
-               brcmu_pkt_buf_free_skb(mypkt);
-       } else {                /* case 3: We have a packet and
-                                it is aligned. */
-               brcmf_dbg(DATA, "Aligned %s Packet, direct DMA\n",
-                         write ? "Tx" : "Rx");
-               status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
-                                                   func, addr, pkt);
+       status = brcmf_sdioh_request_data(sdiodev, write, fifo, func,
+                                          addr, pkt, pkt_len);
+       if (status) {
+               brcmf_dbg(ERROR, "%s FAILED %p, addr=0x%05x, pkt_len=%d, ERR=0x%08x\n",
+                         write ? "TX" : "RX", pkt, addr, pkt_len, status);
+       } else {
+               brcmf_dbg(TRACE, "%s xfr'd %p, addr=0x%05x, len=%d\n",
+                         write ? "TX" : "RX", pkt, addr, pkt_len);
        }
 
+       /* Release host controller */
+       sdio_release_host(sdiodev->func[func]);
+
        return status;
 }