Re: [PATCH 1/2] PCI: brcmstb: Add a way to indicate if PCIe bridge is active

[Florian Fainelli]

On 6/13/25 15:08, Jim Quinlan wrote:
> In a future commit, a new handler will be introduced that in part does
> reads and writes to some of the PCIe registers.  When this handler is
> invoked, it is paramount that it does not do these register accesses when
> the PCIe bridge is inactive, as this will cause CPU abort errors.
>
> To solve this we keep a spinlock that guards a variable which indicates
> whether the bridge is on or off.  When the bridge is on, access of the PCIe
> HW registers may proceed.
>
> Since there are multiple ways to reset the bridge, we introduce a general
> function to obtain the spinlock, call the specific function that is used
> for the specific SoC, sets the bridge active indicator variable, and
> releases the spinlock.
>
> Signed-off-by: Jim Quinlan <james.quinlan@xxxxxxxxxxxx>

Reviewed-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
--
Florian