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* [PATCH] RISC-V: Fix of_node_* refcount
@ 2018-11-20 23:07 atish.patra
  2018-11-20 23:07 ` Atish Patra
                   ` (3 more replies)
  0 siblings, 4 replies; 6+ messages in thread
From: atish.patra @ 2018-11-20 23:07 UTC (permalink / raw)
  To: linux-riscv

Fix of_node* refcount at various places by using of_node_put.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
 arch/riscv/kernel/cacheinfo.c  | 11 +++++++++++
 arch/riscv/kernel/cpu.c        |  1 +
 arch/riscv/kernel/cpufeature.c |  2 ++
 arch/riscv/kernel/perf_event.c |  1 +
 arch/riscv/kernel/smpboot.c    |  6 +++++-
 5 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/cacheinfo.c b/arch/riscv/kernel/cacheinfo.c
index cb35ffd8..638dee3f 100644
--- a/arch/riscv/kernel/cacheinfo.c
+++ b/arch/riscv/kernel/cacheinfo.c
@@ -28,6 +28,7 @@ static int __init_cache_level(unsigned int cpu)
 {
 	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
 	struct device_node *np = of_cpu_device_node_get(cpu);
+	struct device_node *prev = NULL;
 	int levels = 0, leaves = 0, level;
 
 	if (of_property_read_bool(np, "cache-size"))
@@ -39,7 +40,10 @@ static int __init_cache_level(unsigned int cpu)
 	if (leaves > 0)
 		levels = 1;
 
+	prev = np;
 	while ((np = of_find_next_cache_node(np))) {
+		of_node_put(prev);
+		prev = np;
 		if (!of_device_is_compatible(np, "cache"))
 			break;
 		if (of_property_read_u32(np, "cache-level", &level))
@@ -55,8 +59,10 @@ static int __init_cache_level(unsigned int cpu)
 		levels = level;
 	}
 
+	of_node_put(np);
 	this_cpu_ci->num_levels = levels;
 	this_cpu_ci->num_leaves = leaves;
+
 	return 0;
 }
 
@@ -65,6 +71,7 @@ static int __populate_cache_leaves(unsigned int cpu)
 	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
 	struct cacheinfo *this_leaf = this_cpu_ci->info_list;
 	struct device_node *np = of_cpu_device_node_get(cpu);
+	struct device_node *prev = NULL;
 	int levels = 1, level = 1;
 
 	if (of_property_read_bool(np, "cache-size"))
@@ -74,7 +81,10 @@ static int __populate_cache_leaves(unsigned int cpu)
 	if (of_property_read_bool(np, "d-cache-size"))
 		ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
 
+	prev = np;
 	while ((np = of_find_next_cache_node(np))) {
+		of_node_put(prev);
+		prev = np;
 		if (!of_device_is_compatible(np, "cache"))
 			break;
 		if (of_property_read_u32(np, "cache-level", &level))
@@ -89,6 +99,7 @@ static int __populate_cache_leaves(unsigned int cpu)
 			ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
 		levels = level;
 	}
+	of_node_put(np);
 
 	return 0;
 }
diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
index 3a5a2ee3..7b3eb970 100644
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -155,6 +155,7 @@ static int c_show(struct seq_file *m, void *v)
 	    && strcmp(compat, "riscv"))
 		seq_printf(m, "uarch\t\t: %s\n", compat);
 	seq_puts(m, "\n");
+	of_node_put(node);
 
 	return 0;
 }
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 0339087a..a6e369ed 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -56,8 +56,10 @@ void riscv_fill_hwcap(void)
 
 	if (of_property_read_string(node, "riscv,isa", &isa)) {
 		pr_warning("Unable to find \"riscv,isa\" devicetree entry");
+		of_node_put(node);
 		return;
 	}
+	of_node_put(node);
 
 	for (i = 0; i < strlen(isa); ++i)
 		elf_hwcap |= isa2hwcap[(unsigned char)(isa[i])];
diff --git a/arch/riscv/kernel/perf_event.c b/arch/riscv/kernel/perf_event.c
index a243fae1..667ee70d 100644
--- a/arch/riscv/kernel/perf_event.c
+++ b/arch/riscv/kernel/perf_event.c
@@ -476,6 +476,7 @@ int __init init_hw_perf_events(void)
 
 		if (of_id)
 			riscv_pmu = of_id->data;
+		of_node_put(node);
 	}
 
 	perf_pmu_register(riscv_pmu->pmu, "cpu", PERF_TYPE_RAW);
diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index 18cda0e8..fc185eca 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -57,12 +57,15 @@ void __init setup_smp(void)
 
 	while ((dn = of_find_node_by_type(dn, "cpu"))) {
 		hart = riscv_of_processor_hartid(dn);
-		if (hart < 0)
+		if (hart < 0) {
+			of_node_put(dn);
 			continue;
+		}
 
 		if (hart == cpuid_to_hartid_map(0)) {
 			BUG_ON(found_boot_cpu);
 			found_boot_cpu = 1;
+			of_node_put(dn);
 			continue;
 		}
 
@@ -70,6 +73,7 @@ void __init setup_smp(void)
 		set_cpu_possible(cpuid, true);
 		set_cpu_present(cpuid, true);
 		cpuid++;
+		of_node_put(dn);
 	}
 
 	BUG_ON(!found_boot_cpu);
-- 
2.7.4

^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH] RISC-V: Fix of_node_* refcount
  2018-11-20 23:07 [PATCH] RISC-V: Fix of_node_* refcount atish.patra
@ 2018-11-20 23:07 ` Atish Patra
  2018-12-18 23:55 ` Atish Patra
                   ` (2 subsequent siblings)
  3 siblings, 0 replies; 6+ messages in thread
From: Atish Patra @ 2018-11-20 23:07 UTC (permalink / raw)
  To: linux-riscv
  Cc: anup, palmer, linux-kernel, jeremy.linton, atish.patra,
	sudeep.holla, schwab

Fix of_node* refcount at various places by using of_node_put.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
 arch/riscv/kernel/cacheinfo.c  | 11 +++++++++++
 arch/riscv/kernel/cpu.c        |  1 +
 arch/riscv/kernel/cpufeature.c |  2 ++
 arch/riscv/kernel/perf_event.c |  1 +
 arch/riscv/kernel/smpboot.c    |  6 +++++-
 5 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/cacheinfo.c b/arch/riscv/kernel/cacheinfo.c
index cb35ffd8..638dee3f 100644
--- a/arch/riscv/kernel/cacheinfo.c
+++ b/arch/riscv/kernel/cacheinfo.c
@@ -28,6 +28,7 @@ static int __init_cache_level(unsigned int cpu)
 {
 	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
 	struct device_node *np = of_cpu_device_node_get(cpu);
+	struct device_node *prev = NULL;
 	int levels = 0, leaves = 0, level;
 
 	if (of_property_read_bool(np, "cache-size"))
@@ -39,7 +40,10 @@ static int __init_cache_level(unsigned int cpu)
 	if (leaves > 0)
 		levels = 1;
 
+	prev = np;
 	while ((np = of_find_next_cache_node(np))) {
+		of_node_put(prev);
+		prev = np;
 		if (!of_device_is_compatible(np, "cache"))
 			break;
 		if (of_property_read_u32(np, "cache-level", &level))
@@ -55,8 +59,10 @@ static int __init_cache_level(unsigned int cpu)
 		levels = level;
 	}
 
+	of_node_put(np);
 	this_cpu_ci->num_levels = levels;
 	this_cpu_ci->num_leaves = leaves;
+
 	return 0;
 }
 
@@ -65,6 +71,7 @@ static int __populate_cache_leaves(unsigned int cpu)
 	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
 	struct cacheinfo *this_leaf = this_cpu_ci->info_list;
 	struct device_node *np = of_cpu_device_node_get(cpu);
+	struct device_node *prev = NULL;
 	int levels = 1, level = 1;
 
 	if (of_property_read_bool(np, "cache-size"))
@@ -74,7 +81,10 @@ static int __populate_cache_leaves(unsigned int cpu)
 	if (of_property_read_bool(np, "d-cache-size"))
 		ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
 
+	prev = np;
 	while ((np = of_find_next_cache_node(np))) {
+		of_node_put(prev);
+		prev = np;
 		if (!of_device_is_compatible(np, "cache"))
 			break;
 		if (of_property_read_u32(np, "cache-level", &level))
@@ -89,6 +99,7 @@ static int __populate_cache_leaves(unsigned int cpu)
 			ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
 		levels = level;
 	}
+	of_node_put(np);
 
 	return 0;
 }
diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
index 3a5a2ee3..7b3eb970 100644
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -155,6 +155,7 @@ static int c_show(struct seq_file *m, void *v)
 	    && strcmp(compat, "riscv"))
 		seq_printf(m, "uarch\t\t: %s\n", compat);
 	seq_puts(m, "\n");
+	of_node_put(node);
 
 	return 0;
 }
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 0339087a..a6e369ed 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -56,8 +56,10 @@ void riscv_fill_hwcap(void)
 
 	if (of_property_read_string(node, "riscv,isa", &isa)) {
 		pr_warning("Unable to find \"riscv,isa\" devicetree entry");
+		of_node_put(node);
 		return;
 	}
+	of_node_put(node);
 
 	for (i = 0; i < strlen(isa); ++i)
 		elf_hwcap |= isa2hwcap[(unsigned char)(isa[i])];
diff --git a/arch/riscv/kernel/perf_event.c b/arch/riscv/kernel/perf_event.c
index a243fae1..667ee70d 100644
--- a/arch/riscv/kernel/perf_event.c
+++ b/arch/riscv/kernel/perf_event.c
@@ -476,6 +476,7 @@ int __init init_hw_perf_events(void)
 
 		if (of_id)
 			riscv_pmu = of_id->data;
+		of_node_put(node);
 	}
 
 	perf_pmu_register(riscv_pmu->pmu, "cpu", PERF_TYPE_RAW);
diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index 18cda0e8..fc185eca 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -57,12 +57,15 @@ void __init setup_smp(void)
 
 	while ((dn = of_find_node_by_type(dn, "cpu"))) {
 		hart = riscv_of_processor_hartid(dn);
-		if (hart < 0)
+		if (hart < 0) {
+			of_node_put(dn);
 			continue;
+		}
 
 		if (hart == cpuid_to_hartid_map(0)) {
 			BUG_ON(found_boot_cpu);
 			found_boot_cpu = 1;
+			of_node_put(dn);
 			continue;
 		}
 
@@ -70,6 +73,7 @@ void __init setup_smp(void)
 		set_cpu_possible(cpuid, true);
 		set_cpu_present(cpuid, true);
 		cpuid++;
+		of_node_put(dn);
 	}
 
 	BUG_ON(!found_boot_cpu);
-- 
2.7.4


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH] RISC-V: Fix of_node_* refcount
  2018-11-20 23:07 [PATCH] RISC-V: Fix of_node_* refcount atish.patra
  2018-11-20 23:07 ` Atish Patra
@ 2018-12-18 23:55 ` Atish Patra
  2019-01-07 13:33 ` Andreas Schwab
  2019-01-07 14:16 ` [PATCH] RISC-V: fix bad use of of_node_put Andreas Schwab
  3 siblings, 0 replies; 6+ messages in thread
From: Atish Patra @ 2018-12-18 23:55 UTC (permalink / raw)
  To: linux-riscv
  Cc: sudeep.holla, anup, palmer, linux-kernel, jeremy.linton, schwab

On 11/20/18 3:07 PM, Atish Patra wrote:
> Fix of_node* refcount at various places by using of_node_put.
> 
> Signed-off-by: Atish Patra <atish.patra@wdc.com>
> ---
>   arch/riscv/kernel/cacheinfo.c  | 11 +++++++++++
>   arch/riscv/kernel/cpu.c        |  1 +
>   arch/riscv/kernel/cpufeature.c |  2 ++
>   arch/riscv/kernel/perf_event.c |  1 +
>   arch/riscv/kernel/smpboot.c    |  6 +++++-
>   5 files changed, 20 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/kernel/cacheinfo.c b/arch/riscv/kernel/cacheinfo.c
> index cb35ffd8..638dee3f 100644
> --- a/arch/riscv/kernel/cacheinfo.c
> +++ b/arch/riscv/kernel/cacheinfo.c
> @@ -28,6 +28,7 @@ static int __init_cache_level(unsigned int cpu)
>   {
>   	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
>   	struct device_node *np = of_cpu_device_node_get(cpu);
> +	struct device_node *prev = NULL;
>   	int levels = 0, leaves = 0, level;
>   
>   	if (of_property_read_bool(np, "cache-size"))
> @@ -39,7 +40,10 @@ static int __init_cache_level(unsigned int cpu)
>   	if (leaves > 0)
>   		levels = 1;
>   
> +	prev = np;
>   	while ((np = of_find_next_cache_node(np))) {
> +		of_node_put(prev);
> +		prev = np;
>   		if (!of_device_is_compatible(np, "cache"))
>   			break;
>   		if (of_property_read_u32(np, "cache-level", &level))
> @@ -55,8 +59,10 @@ static int __init_cache_level(unsigned int cpu)
>   		levels = level;
>   	}
>   
> +	of_node_put(np);
>   	this_cpu_ci->num_levels = levels;
>   	this_cpu_ci->num_leaves = leaves;
> +
>   	return 0;
>   }
>   
> @@ -65,6 +71,7 @@ static int __populate_cache_leaves(unsigned int cpu)
>   	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
>   	struct cacheinfo *this_leaf = this_cpu_ci->info_list;
>   	struct device_node *np = of_cpu_device_node_get(cpu);
> +	struct device_node *prev = NULL;
>   	int levels = 1, level = 1;
>   
>   	if (of_property_read_bool(np, "cache-size"))
> @@ -74,7 +81,10 @@ static int __populate_cache_leaves(unsigned int cpu)
>   	if (of_property_read_bool(np, "d-cache-size"))
>   		ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
>   
> +	prev = np;
>   	while ((np = of_find_next_cache_node(np))) {
> +		of_node_put(prev);
> +		prev = np;
>   		if (!of_device_is_compatible(np, "cache"))
>   			break;
>   		if (of_property_read_u32(np, "cache-level", &level))
> @@ -89,6 +99,7 @@ static int __populate_cache_leaves(unsigned int cpu)
>   			ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
>   		levels = level;
>   	}
> +	of_node_put(np);
>   
>   	return 0;
>   }
> diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
> index 3a5a2ee3..7b3eb970 100644
> --- a/arch/riscv/kernel/cpu.c
> +++ b/arch/riscv/kernel/cpu.c
> @@ -155,6 +155,7 @@ static int c_show(struct seq_file *m, void *v)
>   	    && strcmp(compat, "riscv"))
>   		seq_printf(m, "uarch\t\t: %s\n", compat);
>   	seq_puts(m, "\n");
> +	of_node_put(node);
>   
>   	return 0;
>   }
> diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
> index 0339087a..a6e369ed 100644
> --- a/arch/riscv/kernel/cpufeature.c
> +++ b/arch/riscv/kernel/cpufeature.c
> @@ -56,8 +56,10 @@ void riscv_fill_hwcap(void)
>   
>   	if (of_property_read_string(node, "riscv,isa", &isa)) {
>   		pr_warning("Unable to find \"riscv,isa\" devicetree entry");
> +		of_node_put(node);
>   		return;
>   	}
> +	of_node_put(node);
>   
>   	for (i = 0; i < strlen(isa); ++i)
>   		elf_hwcap |= isa2hwcap[(unsigned char)(isa[i])];
> diff --git a/arch/riscv/kernel/perf_event.c b/arch/riscv/kernel/perf_event.c
> index a243fae1..667ee70d 100644
> --- a/arch/riscv/kernel/perf_event.c
> +++ b/arch/riscv/kernel/perf_event.c
> @@ -476,6 +476,7 @@ int __init init_hw_perf_events(void)
>   
>   		if (of_id)
>   			riscv_pmu = of_id->data;
> +		of_node_put(node);
>   	}
>   
>   	perf_pmu_register(riscv_pmu->pmu, "cpu", PERF_TYPE_RAW);
> diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
> index 18cda0e8..fc185eca 100644
> --- a/arch/riscv/kernel/smpboot.c
> +++ b/arch/riscv/kernel/smpboot.c
> @@ -57,12 +57,15 @@ void __init setup_smp(void)
>   
>   	while ((dn = of_find_node_by_type(dn, "cpu"))) {
>   		hart = riscv_of_processor_hartid(dn);
> -		if (hart < 0)
> +		if (hart < 0) {
> +			of_node_put(dn);
>   			continue;
> +		}
>   
>   		if (hart == cpuid_to_hartid_map(0)) {
>   			BUG_ON(found_boot_cpu);
>   			found_boot_cpu = 1;
> +			of_node_put(dn);
>   			continue;
>   		}
>   
> @@ -70,6 +73,7 @@ void __init setup_smp(void)
>   		set_cpu_possible(cpuid, true);
>   		set_cpu_present(cpuid, true);
>   		cpuid++;
> +		of_node_put(dn);
>   	}
>   
>   	BUG_ON(!found_boot_cpu);
> 

ping ?

Regards,
Atish

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH] RISC-V: Fix of_node_* refcount
  2018-11-20 23:07 [PATCH] RISC-V: Fix of_node_* refcount atish.patra
  2018-11-20 23:07 ` Atish Patra
  2018-12-18 23:55 ` Atish Patra
@ 2019-01-07 13:33 ` Andreas Schwab
  2019-01-07 14:16 ` [PATCH] RISC-V: fix bad use of of_node_put Andreas Schwab
  3 siblings, 0 replies; 6+ messages in thread
From: Andreas Schwab @ 2019-01-07 13:33 UTC (permalink / raw)
  To: Atish Patra
  Cc: anup, palmer, linux-kernel, jeremy.linton, sudeep.holla, linux-riscv

On Nov 20 2018, Atish Patra <atish.patra@wdc.com> wrote:

> diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
> index 18cda0e8..fc185eca 100644
> --- a/arch/riscv/kernel/smpboot.c
> +++ b/arch/riscv/kernel/smpboot.c
> @@ -57,12 +57,15 @@ void __init setup_smp(void)
>  
>  	while ((dn = of_find_node_by_type(dn, "cpu"))) {
>  		hart = riscv_of_processor_hartid(dn);
> -		if (hart < 0)
> +		if (hart < 0) {
> +			of_node_put(dn);
>  			continue;
> +		}
>  
>  		if (hart == cpuid_to_hartid_map(0)) {
>  			BUG_ON(found_boot_cpu);
>  			found_boot_cpu = 1;
> +			of_node_put(dn);
>  			continue;
>  		}
>  

[    0.000000] OF: ERROR: Bad of_node_put() on /cpus/cpu@0
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.0.0-rc1-00013-ge0b3e41110 #4
[    0.000000] Call Trace:
[    0.000000] [<ffffffe0010c8c74>] walk_stackframe+0x0/0xa4
[    0.000000] [<ffffffe0010c8e74>] show_stack+0x2a/0x34
[    0.000000] [<ffffffe00160989c>] dump_stack+0x62/0x7c
[    0.000000] [<ffffffe0014d9660>] of_node_release+0xbe/0xc0
[    0.000000] [<ffffffe00160e560>] kobject_put+0xa6/0x1e8
[    0.000000] [<ffffffe0014d8bb8>] of_node_put+0x16/0x20
[    0.000000] [<ffffffe0014d4bc2>] of_find_node_by_type+0x66/0xa4
[    0.000000] [<ffffffe0000028bc>] 0xffffffe0000028bc
[    0.000000] [<ffffffe0000026cc>] 0xffffffe0000026cc
[    0.000000] [<ffffffe0000006ec>] 0xffffffe0000006ec
[    0.000000] [<ffffffe000000076>] 0xffffffe000000076
[    0.000000] OF: ERROR: Bad of_node_put() on /cpus/cpu@1
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.0.0-rc1-00013-ge0b3e41110 #4
[    0.000000] Call Trace:
[    0.000000] [<ffffffe0010c8c74>] walk_stackframe+0x0/0xa4
[    0.000000] [<ffffffe0010c8e74>] show_stack+0x2a/0x34
[    0.000000] [<ffffffe00160989c>] dump_stack+0x62/0x7c
[    0.000000] [<ffffffe0014d9660>] of_node_release+0xbe/0xc0
[    0.000000] [<ffffffe00160e560>] kobject_put+0xa6/0x1e8
[    0.000000] [<ffffffe0014d8bb8>] of_node_put+0x16/0x20
[    0.000000] [<ffffffe0014d4bc2>] of_find_node_by_type+0x66/0xa4
[    0.000000] [<ffffffe0000028bc>] 0xffffffe0000028bc
[    0.000000] [<ffffffe0000026cc>] 0xffffffe0000026cc
[    0.000000] [<ffffffe0000006ec>] 0xffffffe0000006ec
[    0.000000] [<ffffffe000000076>] 0xffffffe000000076

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."

_______________________________________________
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^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH] RISC-V: fix bad use of of_node_put
  2018-11-20 23:07 [PATCH] RISC-V: Fix of_node_* refcount atish.patra
                   ` (2 preceding siblings ...)
  2019-01-07 13:33 ` Andreas Schwab
@ 2019-01-07 14:16 ` Andreas Schwab
  2019-01-08 10:10   ` Atish Patra
  3 siblings, 1 reply; 6+ messages in thread
From: Andreas Schwab @ 2019-01-07 14:16 UTC (permalink / raw)
  To: Atish Patra
  Cc: anup, palmer, linux-kernel, jeremy.linton, sudeep.holla, linux-riscv

of_find_node_by_type already calls of_node_put, don't call it again.

Fixes: 94f9bf118f ("RISC-V: Fix of_node_* refcount")
Signed-off-by: Andreas Schwab <schwab@suse.de>
---
 arch/riscv/kernel/smpboot.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index fc185ecabb..18cda0e8cf 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -57,15 +57,12 @@ void __init setup_smp(void)
 
 	while ((dn = of_find_node_by_type(dn, "cpu"))) {
 		hart = riscv_of_processor_hartid(dn);
-		if (hart < 0) {
-			of_node_put(dn);
+		if (hart < 0)
 			continue;
-		}
 
 		if (hart == cpuid_to_hartid_map(0)) {
 			BUG_ON(found_boot_cpu);
 			found_boot_cpu = 1;
-			of_node_put(dn);
 			continue;
 		}
 
@@ -73,7 +70,6 @@ void __init setup_smp(void)
 		set_cpu_possible(cpuid, true);
 		set_cpu_present(cpuid, true);
 		cpuid++;
-		of_node_put(dn);
 	}
 
 	BUG_ON(!found_boot_cpu);
-- 
2.20.1

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."

_______________________________________________
linux-riscv mailing list
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http://lists.infradead.org/mailman/listinfo/linux-riscv

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH] RISC-V: fix bad use of of_node_put
  2019-01-07 14:16 ` [PATCH] RISC-V: fix bad use of of_node_put Andreas Schwab
@ 2019-01-08 10:10   ` Atish Patra
  0 siblings, 0 replies; 6+ messages in thread
From: Atish Patra @ 2019-01-08 10:10 UTC (permalink / raw)
  To: Andreas Schwab
  Cc: anup, palmer, linux-kernel, jeremy.linton, sudeep.holla, linux-riscv

On 1/7/19 6:16 AM, Andreas Schwab wrote:
> of_find_node_by_type already calls of_node_put, don't call it again.
> 
> Fixes: 94f9bf118f ("RISC-V: Fix of_node_* refcount")
> Signed-off-by: Andreas Schwab <schwab@suse.de>
> ---
>   arch/riscv/kernel/smpboot.c | 6 +-----
>   1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
> index fc185ecabb..18cda0e8cf 100644
> --- a/arch/riscv/kernel/smpboot.c
> +++ b/arch/riscv/kernel/smpboot.c
> @@ -57,15 +57,12 @@ void __init setup_smp(void)
>   
>   	while ((dn = of_find_node_by_type(dn, "cpu"))) {
>   		hart = riscv_of_processor_hartid(dn);
> -		if (hart < 0) {
> -			of_node_put(dn);
> +		if (hart < 0)
>   			continue;
> -		}
>   
>   		if (hart == cpuid_to_hartid_map(0)) {
>   			BUG_ON(found_boot_cpu);
>   			found_boot_cpu = 1;
> -			of_node_put(dn);
>   			continue;
>   		}
>   
> @@ -73,7 +70,6 @@ void __init setup_smp(void)
>   		set_cpu_possible(cpuid, true);
>   		set_cpu_present(cpuid, true);
>   		cpuid++;
> -		of_node_put(dn);
>   	}
>   
>   	BUG_ON(!found_boot_cpu);
> 
Thanks for catching and fixing this.

Reviewed-by: Atish Patra <atish.patra@wdc.com>

Regards,
Atish

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^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, back to index

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-11-20 23:07 [PATCH] RISC-V: Fix of_node_* refcount atish.patra
2018-11-20 23:07 ` Atish Patra
2018-12-18 23:55 ` Atish Patra
2019-01-07 13:33 ` Andreas Schwab
2019-01-07 14:16 ` [PATCH] RISC-V: fix bad use of of_node_put Andreas Schwab
2019-01-08 10:10   ` Atish Patra

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