Hi Loys, Bjorn,
On Tue, Jan 16, 2018 at 08:45:49AM -0800, Bjorn Andersson wrote:
> On Fri 15 Dec 05:40 PST 2017, Loys Ollivier wrote:
>
> > When using other platform architectures, in the init of the qcom_scm
> > driver, of_node_put is called on /firmware if no qcom dt is found.
> > This results in a kernel error: Bad of_node_put() on /firmware.
> >
> > These calls to of_node_put from the qcom_scm init are unnecessary as
> > of_find_matching_node and of_platform_populate are calling it
> > automatically.
> >
> > Remove the calls to of_node_put() on fw_np.
> >
> > Fixes: d0f6fa7ba2d6 ("firmware: qcom: scm: Convert SCM to platform driver")
> > Suggested-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> > Signed-off-by: Loys Ollivier <lollivier@xxxxxxxxxxxx>
>
> Hi Loys,
>
> Your patch is correct! We are however removing all this logic from
> qcom_scm_init() in v4.16.
>
Unfortunately I seem to have carried the same issue to the new place.
I am fine if Loys wants to post the patch for the same. Let me know if you
want me to post, I have one handy(attached for the reference)
Regards,
Sudeep
-->8
>From 7a563a6f793796339ba1b7a167a77f7353bdd58d Mon Sep 17 00:00:00 2001
From: Sudeep Holla <sudeep.holla@xxxxxxx>
Date: Tue, 16 Jan 2018 17:17:28 +0000
Subject: [PATCH] of: platform: fix OF node refcount leak
We need to call of_node_put() for device nodes obtained with
of_find_node_by_path().
Reported-by: Loys Ollivier <lollivier@xxxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Frank Rowand <frowand.list@xxxxxxxxx>
Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx>
---
drivers/of/platform.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 6a01dab597c7..c00d81dfac0b 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -514,8 +514,10 @@ static int __init of_platform_default_populate_init(void)
of_platform_device_create(node, NULL, NULL);
node = of_find_node_by_path("/firmware");
- if (node)
+ if (node) {
of_platform_populate(node, NULL, NULL, NULL);
+ of_node_put(node);
+ }
/* Populate everything else. */
of_platform_default_populate(NULL, NULL, NULL);
--
2.7.4
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