--- zzzz-none-000/linux-3.10.107/drivers/mfd/mcp-core.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/mfd/mcp-core.c 2021-02-04 17:41:59.000000000 +0000 @@ -137,6 +137,7 @@ void mcp_enable(struct mcp *mcp) { unsigned long flags; + spin_lock_irqsave(&mcp->lock, flags); if (mcp->use_count++ == 0) mcp->ops->enable(mcp);