On 9/24/24 7:43 AM, Markus Elfring wrote:
From: Markus Elfring <[email protected]>
Date: Tue, 24 Sep 2024 14:28:35 +0200
An of_node_put(rmem_np) call was immediately used after a pointer check
for a of_reserved_mem_lookup() call in three function implementations.
Thus call such a function only once instead directly before the checks.
This issue was transformed by using the Coccinelle software.
Quick check of all the users of of_reserved_mem_lookup(), they almost
all do the same thing, get the phandle, mem_lookup, then node_put.
Maybe a helper function like this:
struct reserved_mem *of_reserved_mem_region_lookup(const struct device_node
*node, int index)
{
struct device_node *np;
struct reserved_mem *rmem;
np = of_parse_phandle(node, "memory-region", index);
if (!np)
return ERR_PTR(-ENODEV);
rmem = of_reserved_mem_lookup(np);
of_node_put(np);
if (!rmem)
return ERR_PTR(-EINVAL);
return rmem;
}
Added to of_reserved_mem.c would allow us to clean up these cases in
this patch, and then several more spots (and also help force standard
property name usage).
Andrew
Signed-off-by: Markus Elfring <[email protected]>
---
drivers/remoteproc/ti_k3_dsp_remoteproc.c | 6 ++----
drivers/remoteproc/ti_k3_m4_remoteproc.c | 6 ++----
drivers/remoteproc/ti_k3_r5_remoteproc.c | 3 +--
3 files changed, 5 insertions(+), 10 deletions(-)
diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index 8be3f631c192..d08a3a98ada1 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -576,11 +576,9 @@ static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc
*kproc)
return -EINVAL;
rmem = of_reserved_mem_lookup(rmem_np);
- if (!rmem) {
- of_node_put(rmem_np);
- return -EINVAL;
- }
of_node_put(rmem_np);
+ if (!rmem)
+ return -EINVAL;
kproc->rmem[i].bus_addr = rmem->base;
/* 64-bit address regions currently not supported */
diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c
b/drivers/remoteproc/ti_k3_m4_remoteproc.c
index 09f0484a90e1..a16fb165fced 100644
--- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
@@ -433,11 +433,9 @@ static int k3_m4_reserved_mem_init(struct k3_m4_rproc
*kproc)
return -EINVAL;
rmem = of_reserved_mem_lookup(rmem_np);
- if (!rmem) {
- of_node_put(rmem_np);
- return -EINVAL;
- }
of_node_put(rmem_np);
+ if (!rmem)
+ return -EINVAL;
kproc->rmem[i].bus_addr = rmem->base;
/* 64-bit address regions currently not supported */
diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c
b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 747ee467da88..d0ebdd5cfa70 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -1001,12 +1001,11 @@ static int k3_r5_reserved_mem_init(struct k3_r5_rproc
*kproc)
}
rmem = of_reserved_mem_lookup(rmem_np);
+ of_node_put(rmem_np);
if (!rmem) {
- of_node_put(rmem_np);
ret = -EINVAL;
goto unmap_rmem;
}
- of_node_put(rmem_np);
kproc->rmem[i].bus_addr = rmem->base;
/*
--
2.46.1
