[PATCH] at24: make module parameters changeable via sysfs

["Uwe Kleine-König" <u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>]

The respective values are evaluated at each read/write, so no further
action is required than to change the perm argument to module_param.

Note there is no sanity check so root can make the driver effectively
unusable but that's what root is for :-)

Signed-off-by: Uwe Kleine-König <u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/misc/eeprom/at24.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index ab1ad41..8a5a192 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -85,7 +85,7 @@ struct at24_data {
  * This value is forced to be a power of two so that writes align on pages.
  */
 static unsigned io_limit = 128;
-module_param(io_limit, uint, 0);
+module_param(io_limit, uint, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(io_limit, "Maximum bytes per I/O (default 128)");
 
 /*
@@ -93,7 +93,7 @@ MODULE_PARM_DESC(io_limit, "Maximum bytes per I/O (default 128)");
  * it's important to recover from write timeouts.
  */
 static unsigned write_timeout = 25;
-module_param(write_timeout, uint, 0);
+module_param(write_timeout, uint, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(write_timeout, "Time (in ms) to try writes (default 25)");
 
 #define AT24_SIZE_BYTELEN 5
-- 
1.7.10.4