ftrace: remove redundant test on nsigned

Unsigned `cnt' cannot be less than 0.

---
Or should it be `if (!cnt || cnt > MAX)' and what should MAX be then?

index aa08be6..b83f030 100644
@@ -204,7 +204,7 @@ ftrace_event_write(struct file *file, const char __user *ubuf,
 	char *buf;
 	char ch;
 
-	if (!cnt || cnt < 0)
+	if (!cnt)
 		return 0;
 
 	ret = tracing_update_buffers();

Unsigned `len' cannot be less than 0.

---
Or should it be `if (!buf || len > MAX)' and what should MAX be then?

index d0b1f3f..8f799ee 100644
@@ -73,7 +73,7 @@ static ssize_t sputrace_read(struct file *file, char __user *buf,
 {
 	int error = 0, cnt = 0;
 
-	if (!buf || len < 0)
+	if (!buf)
 		return -EINVAL;
 
 	while (cnt < len) {

Roel,

Thanks for the patch. However, we have a patch from Christoph Hellwig pending that will rework the sputrace code:

http://patchwork.ozlabs.org/patch/28641/

It's currently queued in benh's tree, should be up soon.

Cheers,

Jeremy

The patch is fine, but there's a typo in the title s/nsigned/unsigned

No, note there is another check:

	if (cnt > EVENT_BUF_SIZE)
		cnt = EVENT_BUF_SIZE;