[PATCH v2 11/51] sparc: led: consume the whole write

[Christian Brauner]

led_proc_write() looks at the first eight bytes of a write and returns
that many, so a writer that loops until everything is written, stdio
does, sends the rest as a second command. That one is unknown and
switches the LED off. Return the whole count, the rest is ignored.

Fixes: ee1858d3122d ("[SPARC]: Add sun4m LED driver.")
Signed-off-by: Christian Brauner (Amutable) <brauner at kernel.org>
---
 arch/sparc/kernel/led.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/sparc/kernel/led.c b/arch/sparc/kernel/led.c
index 9b53ac1fe533..a1478de9fe5d 100644
--- a/arch/sparc/kernel/led.c
+++ b/arch/sparc/kernel/led.c
@@ -68,6 +68,7 @@ static int led_proc_open(struct inode *inode, struct file *file)
 static ssize_t led_proc_write(struct file *file, const char __user *buffer,
 			      size_t count, loff_t *ppos)
 {
+	size_t len = count;
 	char *buf = NULL;
 
 	if (count > LED_MAX_LENGTH)
@@ -102,7 +103,7 @@ static ssize_t led_proc_write(struct file *file, const char __user *buffer,
 
 	kfree(buf);
 
-	return count;
+	return len;
 }
 
 static const struct proc_ops led_proc_ops = {

-- 
2.53.0