mwifiex: claim sdio bus while downloading the firmware

Our 8887 A2 chip can have separate firmware images for
bluetooth and WLAN. We observed an issue during parallel
downloading of these images by btmrvl and mwifiex drivers.

This patch claims sdio bus before starting of the firmware
download in mwifiex and releases it after completion to
fix the problem.

Signed-off-by: Aniket Nagarnaik <[email protected]>
Signed-off-by: Amitkumar Karwar <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>

diff --git a/drivers/net/wireless/mwifiex/sdio.c b/drivers/net/wireless/mwifiex/sdio.c
index 7cef27e9d33fa33a3ad632b54743a5435d348c4b..5d05c6fe642985cd377eefec707d75112f0240ea 100644 (file)
--- a/drivers/net/wireless/mwifiex/sdio.c
+++ b/drivers/net/wireless/mwifiex/sdio.c
@@ -920,6 +920,8 @@ static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
        if (!fwbuf)
                return -ENOMEM;
 
+       sdio_claim_host(card->func);
+
        /* Perform firmware data transfer */
        do {
                /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
@@ -1024,6 +1026,8 @@ static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
                offset += txlen;
        } while (true);
 
+       sdio_release_host(card->func);
+
        mwifiex_dbg(adapter, MSG,
                    "info: FW download over, size %d bytes\n", offset);