[PATCH -next 2/4] ipmi: bt: add clock control logic

Andrew Jeffery andrew at aj.id.au
Wed Nov 3 09:14:15 AEDT 2021

On Tue, 2 Nov 2021, at 10:07, jae.hyun.yoo at intel.com wrote:
> From: Jae Hyun Yoo <jae.hyun.yoo at linux.intel.com>
> If LPC BT driver is registered ahead of lpc-ctrl module, LPC BT
> hardware block will be enabled without heart beating of LCLK until
> lpc-ctrl enables the LCLK. This issue causes improper handling on
> host interrupts when the host sends interrupts in that time frame.
> Then kernel eventually forcibly disables the interrupt with
> dumping stack and printing a 'nobody cared this irq' message out.
> To prevent this issue, all LPC sub drivers should enable LCLK
> individually so this patch adds clock control logic into the LPC
> BT driver.
> Fixes: 54f9c4d0778b ("ipmi: add an Aspeed BT IPMI BMC driver")
> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo at linux.intel.com>

Reviewed-by: Andrew Jeffery <andrew at aj.id.au>

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