---

yaml --- r: 165056 b: refs/heads/master c: 8cd0166 h: refs/heads/master v: v3
git-mirror · Sep 23, 2009 · aa5aa4c · aa5aa4c
1 parent f507255
commit aa5aa4c
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 798199867385417ba6494472e39c016e3340758c
+refs/heads/master: 8cd01664344e983d73a85ce604f7c23f475cf303
diff --git a/trunk/drivers/usb/usb-skeleton.c b/trunk/drivers/usb/usb-skeleton.c
@@ -268,6 +268,11 @@ static ssize_t skel_read(struct file *file, char *buffer, size_t count, loff_t *
 	spin_unlock_irq(&dev->err_lock);
 
 	if (ongoing_io) {
+		/* nonblocking IO shall not wait */
+		if (file->f_flags & O_NONBLOCK) {
+			rv = -EAGAIN;
+			goto exit;
+		}
 		/*
 		 * IO may take forever
 		 * hence wait in an interruptible state
@@ -351,8 +356,9 @@ static ssize_t skel_read(struct file *file, char *buffer, size_t count, loff_t *
 		rv = skel_do_read_io(dev, count);
 		if (rv < 0)
 			goto exit;
-		else
+		else if (!file->f_flags & O_NONBLOCK)
 			goto retry;
+		rv = -EAGAIN;
 	}
 exit:
 	mutex_unlock(&dev->io_mutex);