[PATCH v2 02/23] interconnect: fix icc_provider_del() error handling

[Luca Ceresoli]

On Mon,  6 Mar 2023 08:56:30 +0100
Johan Hovold <johan+linaro at kernel.org> wrote:

> The interconnect framework currently expects that providers are only
> removed when there are no users and after all nodes have been removed.
> 
> There is currently nothing that guarantees this to be the case and the
> framework does not do any reference counting, but refusing to remove the
> provider is never correct as that would leave a dangling pointer to a
> resource that is about to be released in the global provider list (e.g.
> accessible through debugfs).
> 
> Replace the current sanity checks with WARN_ON() so that the provider is
> always removed.
> 
> Fixes: 11f1ceca7031 ("interconnect: Add generic on-chip interconnect API")
> Cc: stable at vger.kernel.org      # 5.1: 680f8666baf6: interconnect: Make icc_provider_del() return void
> Reviewed-by: Konrad Dybcio <konrad.dybcio at linaro.org>
> Signed-off-by: Johan Hovold <johan+linaro at kernel.org>

[Tested on i.MX8MP using an MSC SM2-MB-EP1 Board]
Tested-by: Luca Ceresoli <luca.ceresoli at bootlin.com>

-- 
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com