Messages in this thread Patch in this message | | | Date | Wed, 6 Dec 2017 12:06:01 -0800 | From | Stephen Boyd <> | Subject | Re: [PATCH v2] firmware: qcom: scm: Fix incorrect of_node_put call in scm_init |
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On 12/06, 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. > > The call to of_node_put from the qcom_scm init is unnecessary as > of_find_matching_node is calling it automatically. > > Remove this of_node_put(). > > Fixes: d0f6fa7ba2d6 ("firmware: qcom: scm: Convert SCM to platform driver") > Signed-off-by: Loys Ollivier <lollivier@baylibre.com> > ---
This still looks wrong. Especially if of_find_matching_node() is going to look for siblings of the /firmware node for the compatible string for scm device. Why do we check at all? Can't we just delete this and let of_platform_populate() take care of it? BTW, OP-TEE driver seems to have a similar problem.
---8<----
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index af4c75217ea6..440d8f796faa 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -626,23 +626,11 @@ static int __init qcom_scm_init(void) int ret; fw_np = of_find_node_by_name(NULL, "firmware"); - if (!fw_np) - return -ENODEV; - - np = of_find_matching_node(fw_np, qcom_scm_dt_match); - - if (!np) { - of_node_put(fw_np); - return -ENODEV; - } - - of_node_put(np); + return 0; ret = of_platform_populate(fw_np, qcom_scm_dt_match, NULL, NULL); - of_node_put(fw_np); - if (ret) return ret; -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
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