[PATCH v2] i2c: bcm-iproc: Fix bcm_iproc_i2c_isr deadlock issue

[Andi Shyti]

Hi Chengfeng,

On Fri, Jul 07, 2023 at 08:49:41AM +0000, Chengfeng Ye wrote:
> iproc_i2c_rd_reg() and iproc_i2c_wr_reg() are called from both
> interrupt context (e.g. bcm_iproc_i2c_isr) and process context
> (e.g. bcm_iproc_i2c_suspend). Therefore, interrupts should be
> disabled to avoid potential deadlock. To prevent this scenario,
> use spin_lock_irqsave().
> 
> Fixes: 9a1038728037 ("i2c: iproc: add NIC I2C support")
> Signed-off-by: Chengfeng Ye <dg573847474 at gmail.com>

Reviewed-by: Andi Shyti <andi.shyti at kernel.org> 

Thanks,
Andi