diff mbox series

[15/30] bus: brcmstb_gisb: Clean-up panic/die notifiers

Message ID 20220427224924.592546-16-gpiccoli@igalia.com (mailing list archive)
State Not Applicable
Headers show
Series The panic notifiers refactor | expand

Commit Message

Guilherme G. Piccoli April 27, 2022, 10:49 p.m. UTC
This patch improves the panic/die notifiers in this driver by
making use of a passed "id" instead of comparing pointer
address; also, it removes an useless prototype declaration
and unnecessary header inclusion.

This is part of a panic notifiers refactor - this notifier in
the future will be moved to a new list, that encompass the
information notifiers only.

Fixes: 9eb60880d9a9 ("bus: brcmstb_gisb: add notifier handling")
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
---
 drivers/bus/brcmstb_gisb.c | 26 +++++++++++---------------
 1 file changed, 11 insertions(+), 15 deletions(-)

Comments

Florian Fainelli May 2, 2022, 3:38 p.m. UTC | #1
On 4/27/2022 3:49 PM, Guilherme G. Piccoli wrote:
> This patch improves the panic/die notifiers in this driver by
> making use of a passed "id" instead of comparing pointer
> address; also, it removes an useless prototype declaration
> and unnecessary header inclusion.
> 
> This is part of a panic notifiers refactor - this notifier in
> the future will be moved to a new list, that encompass the
> information notifiers only.
> 
> Fixes: 9eb60880d9a9 ("bus: brcmstb_gisb: add notifier handling")
> Cc: Brian Norris <computersforpeace@gmail.com>
> Cc: Florian Fainelli <f.fainelli@gmail.com>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>

Acked-by: Florian Fainelli <f.fainelli@gmail.com>

Not sure if the Fixes tag is warranted however as this is a clean up, 
and not really fixing a bug.
Guilherme G. Piccoli May 2, 2022, 3:50 p.m. UTC | #2
On 02/05/2022 12:38, Florian Fainelli wrote:
> [...] 
> 
> Acked-by: Florian Fainelli <f.fainelli@gmail.com>
> 
> Not sure if the Fixes tag is warranted however as this is a clean up, 
> and not really fixing a bug.

Perfect, thanks Florian. I'll add your ACK and remove the fixes tag in V2.
Cheers,


Guilherme
Petr Mladek May 10, 2022, 3:28 p.m. UTC | #3
On Wed 2022-04-27 19:49:09, Guilherme G. Piccoli wrote:
> This patch improves the panic/die notifiers in this driver by
> making use of a passed "id" instead of comparing pointer
> address; also, it removes an useless prototype declaration
> and unnecessary header inclusion.
> 
> This is part of a panic notifiers refactor - this notifier in
> the future will be moved to a new list, that encompass the
> information notifiers only.
> 
> --- a/drivers/bus/brcmstb_gisb.c
> +++ b/drivers/bus/brcmstb_gisb.c
> @@ -347,25 +346,14 @@ static irqreturn_t brcmstb_gisb_bp_handler(int irq, void *dev_id)
>  /*
>   * Dump out gisb errors on die or panic.
>   */
> -static int dump_gisb_error(struct notifier_block *self, unsigned long v,
> -			   void *p);
> -
> -static struct notifier_block gisb_die_notifier = {
> -	.notifier_call = dump_gisb_error,
> -};
> -
> -static struct notifier_block gisb_panic_notifier = {
> -	.notifier_call = dump_gisb_error,
> -};
> -
>  static int dump_gisb_error(struct notifier_block *self, unsigned long v,
>  			   void *p)
>  {
>  	struct brcmstb_gisb_arb_device *gdev;
> -	const char *reason = "panic";
> +	const char *reason = "die";
>  
> -	if (self == &gisb_die_notifier)
> -		reason = "die";
> +	if (v == PANIC_NOTIFIER)
> +		reason = "panic";

IMHO, the check of the @self parameter was the proper solution.

"gisb_die_notifier" list uses @val from enum die_val.
"gisb_panic_notifier" list uses @val from enum panic_notifier_val.

These are unrelated types. It might easily break when
someone defines the same constant also in enum die_val.

Best Regards,
Petr
Guilherme G. Piccoli May 17, 2022, 3:32 p.m. UTC | #4
On 10/05/2022 12:28, Petr Mladek wrote:
> [...]
> IMHO, the check of the @self parameter was the proper solution.
> 
> "gisb_die_notifier" list uses @val from enum die_val.
> "gisb_panic_notifier" list uses @val from enum panic_notifier_val.
> 
> These are unrelated types. It might easily break when
> someone defines the same constant also in enum die_val.
> 
> Best Regards,
> Petr

OK Petr, I'll drop this idea for V2 - will just remove the useless
header / prototype then. (CC Florian)


Cheers,


Guilherme
diff mbox series

Patch

diff --git a/drivers/bus/brcmstb_gisb.c b/drivers/bus/brcmstb_gisb.c
index 183d5cc37d42..1ea7b015e225 100644
--- a/drivers/bus/brcmstb_gisb.c
+++ b/drivers/bus/brcmstb_gisb.c
@@ -19,7 +19,6 @@ 
 #include <linux/pm.h>
 #include <linux/kernel.h>
 #include <linux/kdebug.h>
-#include <linux/notifier.h>
 
 #ifdef CONFIG_MIPS
 #include <asm/traps.h>
@@ -347,25 +346,14 @@  static irqreturn_t brcmstb_gisb_bp_handler(int irq, void *dev_id)
 /*
  * Dump out gisb errors on die or panic.
  */
-static int dump_gisb_error(struct notifier_block *self, unsigned long v,
-			   void *p);
-
-static struct notifier_block gisb_die_notifier = {
-	.notifier_call = dump_gisb_error,
-};
-
-static struct notifier_block gisb_panic_notifier = {
-	.notifier_call = dump_gisb_error,
-};
-
 static int dump_gisb_error(struct notifier_block *self, unsigned long v,
 			   void *p)
 {
 	struct brcmstb_gisb_arb_device *gdev;
-	const char *reason = "panic";
+	const char *reason = "die";
 
-	if (self == &gisb_die_notifier)
-		reason = "die";
+	if (v == PANIC_NOTIFIER)
+		reason = "panic";
 
 	/* iterate over each GISB arb registered handlers */
 	list_for_each_entry(gdev, &brcmstb_gisb_arb_device_list, next)
@@ -374,6 +362,14 @@  static int dump_gisb_error(struct notifier_block *self, unsigned long v,
 	return NOTIFY_DONE;
 }
 
+static struct notifier_block gisb_die_notifier = {
+	.notifier_call = dump_gisb_error,
+};
+
+static struct notifier_block gisb_panic_notifier = {
+	.notifier_call = dump_gisb_error,
+};
+
 static DEVICE_ATTR(gisb_arb_timeout, S_IWUSR | S_IRUGO,
 		gisb_arb_get_timeout, gisb_arb_set_timeout);