On 9/24/20 7:39 AM, Lee Jones wrote:

On Thu, 03 Sep 2020, Marc Zyngier wrote:

quoted

The name allocated for the regmap_config structure is freed
pretty early, right after the registration of the MMIO region.

Unfortunately, that doesn't follow the life cycle that debugfs
expects, as it can access the name field long after the free
has occured.

Move the free on the error path, and keep it forever otherwise.

Fixes: e15d7f2b81d2 ("mfd: syscon: Use a unique name with regmap_config")
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 drivers/mfd/syscon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Fixed the spelling mistake and applied, thanks.

Marc,
Can you recheck the behavior once on the latest master to see if this patch is
still needed? I see a new patch within the regmap core that is dealing with the
delayed debugfs registration name. This follows the similar design logic I
suggested on your initial submission [1].

Please see commit 94cc89eb8fa5 ("regmap: debugfs: Fix handling of name string
for debugfs init delays") in mainline.

Lee,
I haven't seen this patch in -next yet, so maybe worthwhile to hold it a little
longer.

regards
Suman

[1] https://patchwork.kernel.org/comment/23575471/


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