On Sat, Apr 13, 2019 at 12:32:11PM +0000, Igor Russkikh wrote:
> From: Nikita Danilov <ndani...@aquantia.com>
>
> Since fw ops may be invoked from different threads all its invocation
> must be wrapped by mutex.
Do all fw ops go through hw_atl_utils_fw_rpc_wait()?
My experience with the mv88e6xxx driver is that you forget a lock
somewhere. So we added code in the low level register access to check
the lock has been taken:
if (unlikely(!mutex_is_locked(&chip->reg_lock))) {
dev_err(chip->dev, "Switch registers lock not held!\n");
dump_stack();
}
Andrew
