1 files changed, 28 insertions, 8 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c b/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c
index afb53b49b31a..72d615a87c36 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c
@@ -948,22 +948,32 @@ static struct i2c_adapter pvr2_i2c_adap_template = {
         .client_unregister = pvr2_i2c_detach_inform,
 };
 
-static void do_i2c_scan(struct pvr2_hdw *hdw)
+
+/* Return true if device exists at given address */
+static int do_i2c_probe(struct pvr2_hdw *hdw, int addr)
 {
         struct i2c_msg msg[1];
-        int i,rc;
+        int rc;
         msg[0].addr = 0;
         msg[0].flags = I2C_M_RD;
         msg[0].len = 0;
         msg[0].buf = NULL;
-        printk("%s: i2c scan beginning\n",hdw->name);
+        msg[0].addr = addr;
+        rc = i2c_transfer(&hdw->i2c_adap, msg, ARRAY_SIZE(msg));
+        return rc == 1;
+}
+
+static void do_i2c_scan(struct pvr2_hdw *hdw)
+{
+        int i;
+        printk(KERN_INFO "%s: i2c scan beginning\n", hdw->name);
         for (i = 0; i < 128; i++) {
-                msg[0].addr = i;
-                rc = i2c_transfer(&hdw->i2c_adap,msg, ARRAY_SIZE(msg));
-                if (rc != 1) continue;
-                printk("%s: i2c scan: found device @ 0x%x\n",hdw->name,i);
+                if (do_i2c_probe(hdw, i)) {
+                        printk(KERN_INFO "%s: i2c scan: found device @ 0x%x\n",
+                               hdw->name, i);
+                }
         }
-        printk("%s: i2c scan done.\n",hdw->name);
+        printk(KERN_INFO "%s: i2c scan done.\n", hdw->name);
 }
 
 void pvr2_i2c_core_init(struct pvr2_hdw *hdw)
@@ -1008,6 +1018,16 @@ void pvr2_i2c_core_init(struct pvr2_hdw *hdw)
         mutex_init(&hdw->i2c_list_lock);
         hdw->i2c_linked = !0;
         i2c_add_adapter(&hdw->i2c_adap);
+        if (hdw->i2c_func[0x18] == i2c_24xxx_ir) {
+                /* Probe for a different type of IR receiver on this
+                   device.  If present, disable the emulated IR receiver. */
+                if (do_i2c_probe(hdw, 0x71)) {
+                        pvr2_trace(PVR2_TRACE_INFO,
+                                   "Device has newer IR hardware;"
+                                   " disabling unneeded virtual IR device");
+                        hdw->i2c_func[0x18] = NULL;
+                }
+        }
         if (i2c_scan) do_i2c_scan(hdw);
 }