greybus: es2: rename USB vendor-request timeout define

Give the USB vendor-request timeout define a more descriptive name.

Also drop the since-long obsolete comments about allowing "the SVC to do
something" and "SVC messages go down our control pipe".

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --git a/drivers/staging/greybus/es2.c b/drivers/staging/greybus/es2.c
index 66fd92d..3b8d81e 100644 (file)
--- a/drivers/staging/greybus/es2.c
+++ b/drivers/staging/greybus/es2.c
@@ -20,6 +20,9 @@
 #include "connection.h"
 
 
+/* Default timeout for USB vendor requests. */
+#define ES2_USB_CTRL_TIMEOUT   500
+
 /* Default timeout for ARPC CPort requests */
 #define ES2_ARPC_CPORT_TIMEOUT 500
 
@@ -204,8 +207,6 @@ static int cport_to_ep_pair(struct es2_ap_dev *es2, u16 cport_id)
        return es2->cport_to_ep[cport_id];
 }
 
-#define ES2_TIMEOUT    500     /* 500 ms for the SVC to do something */
-
 /* Disable for now until we work all of this out to keep a warning-free build */
 #if 0
 /* Test if the endpoints pair is already mapped to a cport */
@@ -250,7 +251,7 @@ static int map_cport_to_ep(struct es2_ap_dev *es2,
                                 0x00, 0x00,
                                 (char *)cport_to_ep,
                                 sizeof(*cport_to_ep),
-                                ES2_TIMEOUT);
+                                ES2_USB_CTRL_TIMEOUT);
        if (retval == sizeof(*cport_to_ep))
                retval = 0;
        kfree(cport_to_ep);
@@ -280,7 +281,7 @@ static int output_sync(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd)
                                 cmd,
                                 USB_DIR_OUT | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE,
-                                0, 0, data, size, ES2_TIMEOUT);
+                                0, 0, data, size, ES2_USB_CTRL_TIMEOUT);
        if (retval < 0)
                dev_err(&udev->dev, "%s: return error %d\n", __func__, retval);
        else
@@ -716,7 +717,7 @@ static int cport_enable(struct gb_host_device *hd, u16 cport_id,
                                GB_APB_REQUEST_CPORT_FLAGS,
                                USB_DIR_OUT | USB_TYPE_VENDOR |
                                USB_RECIP_INTERFACE, cport_id, 0,
-                               req, sizeof(*req), ES2_TIMEOUT);
+                               req, sizeof(*req), ES2_USB_CTRL_TIMEOUT);
        if (ret != sizeof(*req)) {
                dev_err(&udev->dev, "failed to set cport flags for port %d\n",
                                cport_id);
@@ -754,7 +755,7 @@ static int latency_tag_enable(struct gb_host_device *hd, u16 cport_id)
                                 GB_APB_REQUEST_LATENCY_TAG_EN,
                                 USB_DIR_OUT | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE, cport_id, 0, NULL,
-                                0, ES2_TIMEOUT);
+                                0, ES2_USB_CTRL_TIMEOUT);
 
        if (retval < 0)
                dev_err(&udev->dev, "Cannot enable latency tag for cport %d\n",
@@ -772,7 +773,7 @@ static int latency_tag_disable(struct gb_host_device *hd, u16 cport_id)
                                 GB_APB_REQUEST_LATENCY_TAG_DIS,
                                 USB_DIR_OUT | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE, cport_id, 0, NULL,
-                                0, ES2_TIMEOUT);
+                                0, ES2_USB_CTRL_TIMEOUT);
 
        if (retval < 0)
                dev_err(&udev->dev, "Cannot disable latency tag for cport %d\n",
@@ -790,7 +791,7 @@ static int cport_features_enable(struct gb_host_device *hd, u16 cport_id)
                                 GB_APB_REQUEST_CPORT_FEAT_EN,
                                 USB_DIR_OUT | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE, cport_id, 0, NULL,
-                                0, ES2_TIMEOUT);
+                                0, ES2_USB_CTRL_TIMEOUT);
        if (retval < 0)
                dev_err(&udev->dev, "Cannot enable CPort features for cport %u: %d\n",
                        cport_id, retval);
@@ -807,7 +808,7 @@ static int cport_features_disable(struct gb_host_device *hd, u16 cport_id)
                                 GB_APB_REQUEST_CPORT_FEAT_DIS,
                                 USB_DIR_OUT | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE, cport_id, 0, NULL,
-                                0, ES2_TIMEOUT);
+                                0, ES2_USB_CTRL_TIMEOUT);
        if (retval < 0)
                dev_err(&udev->dev,
                        "Cannot disable CPort features for cport %u: %d\n",
@@ -835,7 +836,7 @@ static int timesync_enable(struct gb_host_device *hd, u8 count,
                                 REQUEST_TIMESYNC_ENABLE,
                                 USB_DIR_OUT | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE, 0, 0, request,
-                                sizeof(*request), ES2_TIMEOUT);
+                                sizeof(*request), ES2_USB_CTRL_TIMEOUT);
        if (retval < 0)
                dev_err(&udev->dev, "Cannot enable timesync %d\n", retval);
 
@@ -853,7 +854,7 @@ static int timesync_disable(struct gb_host_device *hd)
                                 REQUEST_TIMESYNC_DISABLE,
                                 USB_DIR_OUT | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE, 0, 0, NULL,
-                                0, ES2_TIMEOUT);
+                                0, ES2_USB_CTRL_TIMEOUT);
        if (retval < 0)
                dev_err(&udev->dev, "Cannot disable timesync %d\n", retval);
 
@@ -878,7 +879,7 @@ static int timesync_authoritative(struct gb_host_device *hd, u64 *frame_time)
                                 REQUEST_TIMESYNC_AUTHORITATIVE,
                                 USB_DIR_OUT | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE, 0, 0, request,
-                                sizeof(*request), ES2_TIMEOUT);
+                                sizeof(*request), ES2_USB_CTRL_TIMEOUT);
        if (retval < 0)
                dev_err(&udev->dev, "Cannot timesync authoritative out %d\n", retval);
 
@@ -901,7 +902,8 @@ static int timesync_get_last_event(struct gb_host_device *hd, u64 *frame_time)
                                 REQUEST_TIMESYNC_GET_LAST_EVENT,
                                 USB_DIR_IN | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE, 0, 0, response_frame_time,
-                                sizeof(*response_frame_time), ES2_TIMEOUT);
+                                sizeof(*response_frame_time),
+                                ES2_USB_CTRL_TIMEOUT);
 
        if (retval != sizeof(*response_frame_time)) {
                dev_err(&udev->dev, "Cannot get last TimeSync event: %d\n",
@@ -1168,7 +1170,7 @@ static int arpc_send(struct es2_ap_dev *es2, struct arpc *rpc, int timeout)
                                 USB_RECIP_INTERFACE,
                                 0, 0,
                                 rpc->req, le16_to_cpu(rpc->req->size),
-                                ES2_TIMEOUT);
+                                ES2_USB_CTRL_TIMEOUT);
        if (retval != le16_to_cpu(rpc->req->size)) {
                dev_err(&udev->dev,
                        "failed to send ARPC request %d: %d\n",
@@ -1288,7 +1290,6 @@ static void apb_log_get(struct es2_ap_dev *es2, char *buf)
 {
        int retval;
 
-       /* SVC messages go down our control pipe */
        do {
                retval = usb_control_msg(es2->usb_dev,
                                        usb_rcvctrlpipe(es2->usb_dev, 0),
@@ -1297,7 +1298,7 @@ static void apb_log_get(struct es2_ap_dev *es2, char *buf)
                                        0x00, 0x00,
                                        buf,
                                        APB1_LOG_MSG_SIZE,
-                                       ES2_TIMEOUT);
+                                       ES2_USB_CTRL_TIMEOUT);
                if (retval > 0)
                        kfifo_in(&es2->apb_log_fifo, buf, retval);
        } while (retval > 0);
@@ -1424,7 +1425,7 @@ static int apb_get_cport_count(struct usb_device *udev)
                                 GB_APB_REQUEST_CPORT_COUNT,
                                 USB_DIR_IN | USB_TYPE_VENDOR |
                                 USB_RECIP_INTERFACE, 0, 0, cport_count,
-                                sizeof(*cport_count), ES2_TIMEOUT);
+                                sizeof(*cport_count), ES2_USB_CTRL_TIMEOUT);
        if (retval != sizeof(*cport_count)) {
                dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n",
                        retval);