From: Luke Kosewski Date: Wed, 1 Jun 2005 07:39:28 +0000 (-0500) Subject: Input: do not corrupt system-wide procfs fops. X-Git-Tag: v2.6.13-rc1~51^2~43^2~9 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=e334016fc1735e491385e14157a0360cd85c321b;p=linux-2.6-omap-h63xx.git Input: do not corrupt system-wide procfs fops. entry->proc_fops is a pointer to struct file_operations. When we call create_proc_entry(...), it pointis to proc_file_operations, deep in fs/proc/generic.c. By adding a 'poll' member to this struct we effectively force the 'poll' member on every file in /proc, which is wrong (they all fail select(...) calls). This patch changes a copy of entry->proc_fops and reassigns it rather than changing the original member. Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/input.c b/drivers/input/input.c index 1885f369e3e..c1dbc04cf54 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -697,6 +697,8 @@ static int input_handlers_read(char *buf, char **start, off_t pos, int count, in return (count > cnt) ? cnt : count; } +static struct file_operations input_fileops; + static int __init input_proc_init(void) { struct proc_dir_entry *entry; @@ -711,6 +713,8 @@ static int __init input_proc_init(void) return -ENOMEM; } entry->owner = THIS_MODULE; + input_fileops = *entry->proc_fops; + entry->proc_fops = &input_fileops; entry->proc_fops->poll = input_devices_poll; entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL); if (entry == NULL) {