From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 18 Apr 2013 09:57:21 +0000 (+0200)
Subject: usb: better speed mismatch error reporting
X-Git-Tag: v1.5.0-rc0~186^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3b7e759a4110690c9617b1ffa6a7c96a343a330d;p=thirdparty%2Fqemu.git

usb: better speed mismatch error reporting

Report the supported speeds for device and port in the error message.
Also add the speeds to the tracepoint.  And while being at it drop
the redundant error message in usb_desc_attach, usb_device_attach will
report the error anyway.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---

diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index b10c290cf40..d1827be1015 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -417,19 +417,47 @@ void usb_release_port(USBDevice *dev)
     bus->nfree++;
 }
 
+static void usb_mask_to_str(char *dest, size_t size,
+                            unsigned int speedmask)
+{
+    static const struct {
+        unsigned int mask;
+        const char *name;
+    } speeds[] = {
+        { .mask = USB_SPEED_MASK_FULL,  .name = "full"  },
+        { .mask = USB_SPEED_MASK_HIGH,  .name = "high"  },
+        { .mask = USB_SPEED_MASK_SUPER, .name = "super" },
+    };
+    int i, pos = 0;
+
+    for (i = 0; i < ARRAY_SIZE(speeds); i++) {
+        if (speeds[i].mask & speedmask) {
+            pos += snprintf(dest + pos, size - pos, "%s%s",
+                            pos ? "+" : "",
+                            speeds[i].name);
+        }
+    }
+}
+
 int usb_device_attach(USBDevice *dev)
 {
     USBBus *bus = usb_bus_from_device(dev);
     USBPort *port = dev->port;
+    char devspeed[32], portspeed[32];
 
     assert(port != NULL);
     assert(!dev->attached);
-    trace_usb_port_attach(bus->busnr, port->path);
+    usb_mask_to_str(devspeed, sizeof(devspeed), dev->speedmask);
+    usb_mask_to_str(portspeed, sizeof(portspeed), port->speedmask);
+    trace_usb_port_attach(bus->busnr, port->path,
+                          devspeed, portspeed);
 
     if (!(port->speedmask & dev->speedmask)) {
-        error_report("Warning: speed mismatch trying to attach "
-                     "usb device %s to bus %s",
-                     dev->product_desc, bus->qbus.name);
+        error_report("Warning: speed mismatch trying to attach"
+                     " usb device \"%s\" (%s speed)"
+                     " to bus \"%s\", port \"%s\" (%s speed)",
+                     dev->product_desc, devspeed,
+                     bus->qbus.name, port->path, portspeed);
         return -1;
     }
 
diff --git a/hw/usb/desc.c b/hw/usb/desc.c
index b3893813269..fce303e9c88 100644
--- a/hw/usb/desc.c
+++ b/hw/usb/desc.c
@@ -522,8 +522,6 @@ void usb_desc_attach(USBDevice *dev)
     } else if (desc->full && (dev->port->speedmask & USB_SPEED_MASK_FULL)) {
         dev->speed = USB_SPEED_FULL;
     } else {
-        fprintf(stderr, "usb: port/device speed mismatch for \"%s\"\n",
-                usb_device_get_product_desc(dev));
         return;
     }
     usb_desc_setdefaults(dev);
diff --git a/trace-events b/trace-events
index e587487a3bb..ffaa3f472e1 100644
--- a/trace-events
+++ b/trace-events
@@ -277,7 +277,7 @@ usb_packet_state_fault(int bus, const char *port, int ep, void *p, const char *o
 
 # hw/usb/bus.c
 usb_port_claim(int bus, const char *port) "bus %d, port %s"
-usb_port_attach(int bus, const char *port) "bus %d, port %s"
+usb_port_attach(int bus, const char *port, const char *devspeed, const char *portspeed) "bus %d, port %s, devspeed %s, portspeed %s"
 usb_port_detach(int bus, const char *port) "bus %d, port %s"
 usb_port_release(int bus, const char *port) "bus %d, port %s"