diff options
Diffstat (limited to 'drivers/i2c/i2c-boardinfo.c')
| -rw-r--r-- | drivers/i2c/i2c-boardinfo.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/i2c/i2c-boardinfo.c b/drivers/i2c/i2c-boardinfo.c index ffb35f09df0..a26a34a0664 100644 --- a/drivers/i2c/i2c-boardinfo.c +++ b/drivers/i2c/i2c-boardinfo.c @@ -18,6 +18,7 @@ #include <linux/kernel.h> #include <linux/i2c.h> +#include <linux/rwsem.h> #include "i2c-core.h" @@ -25,7 +26,7 @@ /* These symbols are exported ONLY FOR the i2c core. * No other users will be supported. */ -DEFINE_MUTEX(__i2c_board_lock); +DECLARE_RWSEM(__i2c_board_lock); EXPORT_SYMBOL_GPL(__i2c_board_lock); LIST_HEAD(__i2c_board_list); @@ -63,7 +64,7 @@ i2c_register_board_info(int busnum, { int status; - mutex_lock(&__i2c_board_lock); + down_write(&__i2c_board_lock); /* dynamic bus numbers will be assigned after the last static one */ if (busnum >= __i2c_first_dynamic_bus_num) @@ -84,7 +85,7 @@ i2c_register_board_info(int busnum, list_add_tail(&devinfo->list, &__i2c_board_list); } - mutex_unlock(&__i2c_board_lock); + up_write(&__i2c_board_lock); return status; } |