* [patch] sparc: leon: Fix a retry loop in leon_init_timers()
@ 2016-11-25 11:25 Dan Carpenter
2016-11-25 11:33 ` Daniel Hellstrom
2016-12-12 2:18 ` David Miller
0 siblings, 2 replies; 3+ messages in thread
From: Dan Carpenter @ 2016-11-25 11:25 UTC (permalink / raw)
To: kernel-janitors
The original code causes a static checker warning because it has a
continue inside a do { } while (0); loop. In that context, a continue
and a break are equivalent. The intent was to go back to the start of
the loop so the continue was a bug.
I've added a retry label at the start and changed the continue to a goto
retry. Then I removed the do { } while (0) loop and pulled the code in
one indent level.
Fixes: 2791c1a43900 ("SPARC/LEON: added support for selecting Timer Core and Timer within core")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
Not tested.
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c
index 33cd171..afcdd5e 100644
--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
@@ -349,37 +349,37 @@ void __init leon_init_timers(void)
/* Find GPTIMER Timer Registers base address otherwise bail out. */
nnp = rootnp;
- do {
- np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
- if (!np) {
- np = of_find_node_by_name(nnp, "01_011");
- if (!np)
- goto bad;
- }
- ampopts = 0;
- pp = of_find_property(np, "ampopts", &len);
- if (pp) {
- ampopts = *(int *)pp->value;
- if (ampopts = 0) {
- /* Skip this instance, resource already
- * allocated by other OS */
- nnp = np;
- continue;
- }
+retry:
+ np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
+ if (!np) {
+ np = of_find_node_by_name(nnp, "01_011");
+ if (!np)
+ goto bad;
+ }
+
+ ampopts = 0;
+ pp = of_find_property(np, "ampopts", &len);
+ if (pp) {
+ ampopts = *(int *)pp->value;
+ if (ampopts = 0) {
+ /* Skip this instance, resource already
+ * allocated by other OS */
+ nnp = np;
+ goto retry;
}
+ }
+
+ /* Select Timer-Instance on Timer Core. Default is zero */
+ leon3_gptimer_idx = ampopts & 0x7;
- /* Select Timer-Instance on Timer Core. Default is zero */
- leon3_gptimer_idx = ampopts & 0x7;
-
- pp = of_find_property(np, "reg", &len);
- if (pp)
- leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)
- pp->value;
- pp = of_find_property(np, "interrupts", &len);
- if (pp)
- leon3_gptimer_irq = *(unsigned int *)pp->value;
- } while (0);
+ pp = of_find_property(np, "reg", &len);
+ if (pp)
+ leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)
+ pp->value;
+ pp = of_find_property(np, "interrupts", &len);
+ if (pp)
+ leon3_gptimer_irq = *(unsigned int *)pp->value;
if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
goto bad;
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [patch] sparc: leon: Fix a retry loop in leon_init_timers()
2016-11-25 11:25 [patch] sparc: leon: Fix a retry loop in leon_init_timers() Dan Carpenter
@ 2016-11-25 11:33 ` Daniel Hellstrom
2016-12-12 2:18 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: Daniel Hellstrom @ 2016-11-25 11:33 UTC (permalink / raw)
To: kernel-janitors
It looks good.
Thanks!
/Daniel
On 2016-11-25 12:25, Dan Carpenter wrote:
> The original code causes a static checker warning because it has a
> continue inside a do { } while (0); loop. In that context, a continue
> and a break are equivalent. The intent was to go back to the start of
> the loop so the continue was a bug.
>
> I've added a retry label at the start and changed the continue to a goto
> retry. Then I removed the do { } while (0) loop and pulled the code in
> one indent level.
>
> Fixes: 2791c1a43900 ("SPARC/LEON: added support for selecting Timer Core and Timer within core")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
> Not tested.
>
> diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c
> index 33cd171..afcdd5e 100644
> --- a/arch/sparc/kernel/leon_kernel.c
> +++ b/arch/sparc/kernel/leon_kernel.c
> @@ -349,37 +349,37 @@ void __init leon_init_timers(void)
>
> /* Find GPTIMER Timer Registers base address otherwise bail out. */
> nnp = rootnp;
> - do {
> - np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
> - if (!np) {
> - np = of_find_node_by_name(nnp, "01_011");
> - if (!np)
> - goto bad;
> - }
>
> - ampopts = 0;
> - pp = of_find_property(np, "ampopts", &len);
> - if (pp) {
> - ampopts = *(int *)pp->value;
> - if (ampopts = 0) {
> - /* Skip this instance, resource already
> - * allocated by other OS */
> - nnp = np;
> - continue;
> - }
> +retry:
> + np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
> + if (!np) {
> + np = of_find_node_by_name(nnp, "01_011");
> + if (!np)
> + goto bad;
> + }
> +
> + ampopts = 0;
> + pp = of_find_property(np, "ampopts", &len);
> + if (pp) {
> + ampopts = *(int *)pp->value;
> + if (ampopts = 0) {
> + /* Skip this instance, resource already
> + * allocated by other OS */
> + nnp = np;
> + goto retry;
> }
> + }
> +
> + /* Select Timer-Instance on Timer Core. Default is zero */
> + leon3_gptimer_idx = ampopts & 0x7;
>
> - /* Select Timer-Instance on Timer Core. Default is zero */
> - leon3_gptimer_idx = ampopts & 0x7;
> -
> - pp = of_find_property(np, "reg", &len);
> - if (pp)
> - leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)
> - pp->value;
> - pp = of_find_property(np, "interrupts", &len);
> - if (pp)
> - leon3_gptimer_irq = *(unsigned int *)pp->value;
> - } while (0);
> + pp = of_find_property(np, "reg", &len);
> + if (pp)
> + leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)
> + pp->value;
> + pp = of_find_property(np, "interrupts", &len);
> + if (pp)
> + leon3_gptimer_irq = *(unsigned int *)pp->value;
>
> if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
> goto bad;
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [patch] sparc: leon: Fix a retry loop in leon_init_timers()
2016-11-25 11:25 [patch] sparc: leon: Fix a retry loop in leon_init_timers() Dan Carpenter
2016-11-25 11:33 ` Daniel Hellstrom
@ 2016-12-12 2:18 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: David Miller @ 2016-12-12 2:18 UTC (permalink / raw)
To: kernel-janitors
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 25 Nov 2016 14:25:54 +0300
> The original code causes a static checker warning because it has a
> continue inside a do { } while (0); loop. In that context, a continue
> and a break are equivalent. The intent was to go back to the start of
> the loop so the continue was a bug.
>
> I've added a retry label at the start and changed the continue to a goto
> retry. Then I removed the do { } while (0) loop and pulled the code in
> one indent level.
>
> Fixes: 2791c1a43900 ("SPARC/LEON: added support for selecting Timer Core and Timer within core")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Applied.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-11-25 11:25 [patch] sparc: leon: Fix a retry loop in leon_init_timers() Dan Carpenter
2016-11-25 11:33 ` Daniel Hellstrom
2016-12-12 2:18 ` David Miller
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