rtlwifi: rtl8192cu: Allow retries for USB I/O

The USB driver does not retry reads - allow 10 tries.

Signed-off-by: George <george0505@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.h b/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.h
index 3d5823c..fcc4032 100644 (file)
--- a/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.h
+++ b/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.h
@@ -32,7 +32,7 @@
 
 #define FW_8192C_SIZE                          0x3000
 #define FW_8192C_START_ADDRESS                 0x1000
-#define FW_8192C_END_ADDRESS                   0x3FFF
+#define FW_8192C_END_ADDRESS                   0x1FFF
 #define FW_8192C_PAGE_SIZE                     4096
 #define FW_8192C_POLLING_DELAY                 5
 #define FW_8192C_POLLING_TIMEOUT_COUNT         100

diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c
index b42c2e2..209105c 100644 (file)
--- a/drivers/net/wireless/rtlwifi/usb.c
+++ b/drivers/net/wireless/rtlwifi/usb.c
@@ -33,6 +33,7 @@
 #include "usb.h"
 #include "base.h"
 #include "ps.h"
+#include "rtl8192c/fw_common.h"
 
 #define        REALTEK_USB_VENQT_READ                  0xC0
 #define        REALTEK_USB_VENQT_WRITE                 0x40
@@ -40,6 +41,7 @@
 #define        REALTEK_USB_VENQT_CMD_IDX               0x00
 
 #define REALTEK_USB_VENQT_MAX_BUF_SIZE         254
+#define MAX_USBCTRL_VENDORREQ_TIMES            10
 
 static void usbctrl_async_callback(struct urb *urb)
 {
@@ -99,13 +101,23 @@ static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
        unsigned int pipe;
        int status;
        u8 reqtype;
+       int vendorreq_times = 0;
 
        pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
        reqtype =  REALTEK_USB_VENQT_READ;
 
-       status = usb_control_msg(udev, pipe, request, reqtype, value, index,
-                                pdata, len, 0); /* max. timeout */
-
+       while (++vendorreq_times <= MAX_USBCTRL_VENDORREQ_TIMES) {
+               status = usb_control_msg(udev, pipe, request, reqtype, value,
+                                        index, pdata, len, 0); /*max. timeout*/
+               if (status < 0) {
+                       /* firmware download is checksumed, don't retry */
+                       if ((value >= FW_8192C_START_ADDRESS &&
+                           value <= FW_8192C_END_ADDRESS))
+                               break;
+               } else {
+                       break;
+               }
+       }
        if (status < 0)
                pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
                       value, status, *(u32 *)pdata);