From 19cdd08ba155dd87ebb87bb39ed097dbee671e0e Mon Sep 17 00:00:00 2001 From: Jan Glauber Date: Fri, 9 Jan 2009 12:14:55 +0100 Subject: [PATCH] [S390] qdio: fix broken pointer in case of CONFIG_DEBUG_FS is disabled If CONFIG_DEBUG_FS is disabled debugfs_create_file returns -ENODEV instead of zero. Since the return value is stored and used at shutdown to remove existing entries an OOPS may be triggered. Add a check of the debugfs_create_file return value and in case of an error set the entry to NULL so it will be ignored at shutdown. Signed-off-by: Jan Glauber Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/qdio_debug.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c index f8a3b6967f69..da7afb04e71f 100644 --- a/drivers/s390/cio/qdio_debug.c +++ b/drivers/s390/cio/qdio_debug.c @@ -169,6 +169,8 @@ static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev) q->nr); debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR, debugfs_root, q, &debugfs_fops); + if (IS_ERR(debugfs_queues[i])) + debugfs_queues[i] = NULL; } void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) -- 2.20.1