* [PATCH] fix compile warning in pseries xics
@ 2007-05-29 5:50 Michael Neuling
2007-05-29 5:52 ` Michael Ellerman
0 siblings, 1 reply; 5+ messages in thread
From: Michael Neuling @ 2007-05-29 5:50 UTC (permalink / raw)
To: paulus; +Cc: linuxppc-dev
In 616883df78bd4b3fcdb6ddc39bd3d4cb902bfa32 request_irq was marked as
__must_check so we must... er... check it.
Signed-off-by: Michael Neuling <mikey@neuling.org>
---
This is the only request_irq which is not checked in arch/powerpc
arch/powerpc/platforms/pseries/xics.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
Index: linux-2.6-ozlabs/arch/powerpc/platforms/pseries/xics.c
===================================================================
--- linux-2.6-ozlabs.orig/arch/powerpc/platforms/pseries/xics.c
+++ linux-2.6-ozlabs/arch/powerpc/platforms/pseries/xics.c
@@ -752,6 +752,7 @@ skip_gserver_check:
void xics_request_IPIs(void)
{
unsigned int ipi;
+ int t;
ipi = irq_create_mapping(xics_host, XICS_IPI);
BUG_ON(ipi == NO_IRQ);
@@ -762,11 +763,15 @@ void xics_request_IPIs(void)
*/
set_irq_handler(ipi, handle_percpu_irq);
if (firmware_has_feature(FW_FEATURE_LPAR))
- request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
- "IPI", NULL);
+ t = request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
+ "IPI", NULL);
else
- request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
- "IPI", NULL);
+ t = request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
+ "IPI", NULL);
+ if (t)
+ printk(KERN_ERR "Unable to request interrupt %d for IPI\n",
+ ipi);
+
}
#endif /* CONFIG_SMP */
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] fix compile warning in pseries xics
2007-05-29 5:50 [PATCH] fix compile warning in pseries xics Michael Neuling
@ 2007-05-29 5:52 ` Michael Ellerman
2007-05-29 7:01 ` Michael Neuling
0 siblings, 1 reply; 5+ messages in thread
From: Michael Ellerman @ 2007-05-29 5:52 UTC (permalink / raw)
To: Michael Neuling; +Cc: linuxppc-dev, paulus
[-- Attachment #1: Type: text/plain, Size: 1787 bytes --]
On Tue, 2007-05-29 at 15:50 +1000, Michael Neuling wrote:
> In 616883df78bd4b3fcdb6ddc39bd3d4cb902bfa32 request_irq was marked as
> __must_check so we must... er... check it.
>
> Signed-off-by: Michael Neuling <mikey@neuling.org>
> ---
> This is the only request_irq which is not checked in arch/powerpc
>
> arch/powerpc/platforms/pseries/xics.c | 13 +++++++++----
> 1 file changed, 9 insertions(+), 4 deletions(-)
>
> Index: linux-2.6-ozlabs/arch/powerpc/platforms/pseries/xics.c
> ===================================================================
> --- linux-2.6-ozlabs.orig/arch/powerpc/platforms/pseries/xics.c
> +++ linux-2.6-ozlabs/arch/powerpc/platforms/pseries/xics.c
> @@ -752,6 +752,7 @@ skip_gserver_check:
> void xics_request_IPIs(void)
> {
> unsigned int ipi;
> + int t;
>
> ipi = irq_create_mapping(xics_host, XICS_IPI);
> BUG_ON(ipi == NO_IRQ);
> @@ -762,11 +763,15 @@ void xics_request_IPIs(void)
> */
> set_irq_handler(ipi, handle_percpu_irq);
> if (firmware_has_feature(FW_FEATURE_LPAR))
> - request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
> - "IPI", NULL);
> + t = request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
> + "IPI", NULL);
> else
> - request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
> - "IPI", NULL);
> + t = request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
> + "IPI", NULL);
> + if (t)
> + printk(KERN_ERR "Unable to request interrupt %d for IPI\n",
> + ipi);
or BUG() ?
cheers
--
Michael Ellerman
OzLabs, IBM Australia Development Lab
wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)
We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
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^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH] fix compile warning in pseries xics
2007-05-29 5:52 ` Michael Ellerman
@ 2007-05-29 7:01 ` Michael Neuling
2007-05-29 14:27 ` Olof Johansson
0 siblings, 1 reply; 5+ messages in thread
From: Michael Neuling @ 2007-05-29 7:01 UTC (permalink / raw)
To: paulus; +Cc: linuxppc-dev
In 616883df78bd4b3fcdb6ddc39bd3d4cb902bfa32 request_irq was marked as
__must_check so we must... er... check it.
Signed-off-by: Michael Neuling <mikey@neuling.org>
---
Updated based on comments from mpe and benh.
arch/powerpc/platforms/pseries/xics.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
Index: linux-2.6-ozlabs/arch/powerpc/platforms/pseries/xics.c
===================================================================
--- linux-2.6-ozlabs.orig/arch/powerpc/platforms/pseries/xics.c
+++ linux-2.6-ozlabs/arch/powerpc/platforms/pseries/xics.c
@@ -752,6 +752,7 @@ skip_gserver_check:
void xics_request_IPIs(void)
{
unsigned int ipi;
+ int rc;
ipi = irq_create_mapping(xics_host, XICS_IPI);
BUG_ON(ipi == NO_IRQ);
@@ -762,11 +763,12 @@ void xics_request_IPIs(void)
*/
set_irq_handler(ipi, handle_percpu_irq);
if (firmware_has_feature(FW_FEATURE_LPAR))
- request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
- "IPI", NULL);
+ rc = request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
+ "IPI", NULL);
else
- request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
- "IPI", NULL);
+ rc = request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
+ "IPI", NULL);
+ BUG_ON(rc);
}
#endif /* CONFIG_SMP */
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] fix compile warning in pseries xics
2007-05-29 7:01 ` Michael Neuling
@ 2007-05-29 14:27 ` Olof Johansson
2007-05-30 0:28 ` Michael Ellerman
0 siblings, 1 reply; 5+ messages in thread
From: Olof Johansson @ 2007-05-29 14:27 UTC (permalink / raw)
To: Michael Neuling; +Cc: linuxppc-dev, paulus
On Tue, May 29, 2007 at 05:01:52PM +1000, Michael Neuling wrote:
> @@ -762,11 +763,12 @@ void xics_request_IPIs(void)
> */
> set_irq_handler(ipi, handle_percpu_irq);
> if (firmware_has_feature(FW_FEATURE_LPAR))
> - request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
> - "IPI", NULL);
> + rc = request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
> + "IPI", NULL);
> else
> - request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
> - "IPI", NULL);
> + rc = request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
> + "IPI", NULL);
> + BUG_ON(rc);
Is this late enough during boot that you actually get useful information
out of a BUG()? It might be better to spit out an error and keep on
going if that's the case (I'm afraid I don't have hardware at hand to
test with right now).
-Olof
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] fix compile warning in pseries xics
2007-05-29 14:27 ` Olof Johansson
@ 2007-05-30 0:28 ` Michael Ellerman
0 siblings, 0 replies; 5+ messages in thread
From: Michael Ellerman @ 2007-05-30 0:28 UTC (permalink / raw)
To: Olof Johansson; +Cc: linuxppc-dev, Michael Neuling, paulus
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On Tue, 2007-05-29 at 09:27 -0500, Olof Johansson wrote:
> On Tue, May 29, 2007 at 05:01:52PM +1000, Michael Neuling wrote:
> > @@ -762,11 +763,12 @@ void xics_request_IPIs(void)
> > */
> > set_irq_handler(ipi, handle_percpu_irq);
> > if (firmware_has_feature(FW_FEATURE_LPAR))
> > - request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
> > - "IPI", NULL);
> > + rc = request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED,
> > + "IPI", NULL);
> > else
> > - request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
> > - "IPI", NULL);
> > + rc = request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED,
> > + "IPI", NULL);
> > + BUG_ON(rc);
>
> Is this late enough during boot that you actually get useful information
> out of a BUG()? It might be better to spit out an error and keep on
> going if that's the case (I'm afraid I don't have hardware at hand to
> test with right now).
It's way late:
start_kernel()
rest_init()
kernel_init()
smp_prepare_cpus()
smp_ops->probe()
smp_xics_probe()
xics_request_IPIs()
cheers
--
Michael Ellerman
OzLabs, IBM Australia Development Lab
wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)
We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 189 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
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2007-05-29 5:50 [PATCH] fix compile warning in pseries xics Michael Neuling
2007-05-29 5:52 ` Michael Ellerman
2007-05-29 7:01 ` Michael Neuling
2007-05-29 14:27 ` Olof Johansson
2007-05-30 0:28 ` Michael Ellerman
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