Re: [PATCH] i2c: designware: Enable interrupt mask workaround for HJMC3001

[Andi Shyti]

Hi Hongbo,

On Wed, Aug 26, 2026 at 03:05:47PM +0800, Hongbo Yao wrote:
> On HJMicro ARM64 servers, the DesignWare I2C controller does not
> retrigger a pending interrupt if the interrupt status changes after
> the current status bits have been cleared.
> 
> The issue is exposed under heavy system load when the corresponding
> SPI is routed across sockets to a core in the remote socket. The
> interrupt is then lost and the I2C transfer times out.
> 
> Enable ACCESS_INTR_MASK for HJMC3001. This toggles DW_IC_INTR_MASK
> before returning from the interrupt handler and retriggers any
> pending interrupt.
> 
> Fixes: 6816ce57c479 ("i2c: designware: Add a new ACPI HID for HJMC01 I2C controller")
> Signed-off-by: Hongbo Yao <andy.xu@xxxxxxxxxxxx>

merged to i2c/i2c-fixes.

Thanks,
Andi