diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c
index 82f0c5f..e5ee8bc 100644
--- a/drivers/media/video/em28xx/em28xx-core.c
+++ b/drivers/media/video/em28xx/em28xx-core.c
@@ -139,6 +139,9 @@
 {
 	int ret, byte;
 
+	if (dev->state & DEV_DISCONNECTED)
+		return(-ENODEV);
+
 	em28xx_regdbg("req=%02x, reg=%02x ", req, reg);
 
 	ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req,
@@ -165,6 +168,9 @@
 	u8 val;
 	int ret;
 
+	if (dev->state & DEV_DISCONNECTED)
+		return(-ENODEV);
+
 	em28xx_regdbg("req=%02x, reg=%02x:", req, reg);
 
 	ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req,
@@ -195,7 +201,12 @@
 	int ret;
 
 	/*usb_control_msg seems to expect a kmalloced buffer */
-	unsigned char *bufs = kmalloc(len, GFP_KERNEL);
+	unsigned char *bufs;
+
+	if (dev->state & DEV_DISCONNECTED)
+		return(-ENODEV);
+
+	bufs = kmalloc(len, GFP_KERNEL);
 
 	em28xx_regdbg("req=%02x reg=%02x:", req, reg);
 
@@ -212,7 +223,7 @@
 	ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), req,
 			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 			      0x0000, reg, bufs, len, HZ);
-	mdelay(5);		/* FIXME: magic number */
+	msleep(5);		/* FIXME: magic number */
 	kfree(bufs);
 	return ret;
 }
diff --git a/drivers/media/video/em28xx/em28xx-i2c.c b/drivers/media/video/em28xx/em28xx-i2c.c
index 0591a70..6ca8631 100644
--- a/drivers/media/video/em28xx/em28xx-i2c.c
+++ b/drivers/media/video/em28xx/em28xx-i2c.c
@@ -78,7 +78,7 @@
 		ret = dev->em28xx_read_reg(dev, 0x05);
 		if (ret == 0x80 + len - 1)
 			return len;
-		mdelay(5);
+		msleep(5);
 	}
 	em28xx_warn("i2c write timed out\n");
 	return -EIO;
@@ -138,7 +138,7 @@
 			return -ENODEV;
 		else if (msg == 0x84)
 			return 0;
-		mdelay(5);
+		msleep(5);
 	}
 	return -ENODEV;
 }
@@ -278,9 +278,9 @@
 							   msgs[i].buf,
 							   msgs[i].len,
 							   i == num - 1);
-			if (rc < 0)
-				goto err;
 		}
+		if (rc < 0)
+			goto err;
 		if (i2c_debug>=2)
 			printk("\n");
 	}