* [PATCH] powerpc/pnv: Avoid bogus output
@ 2012-10-18 2:46 Gavin Shan
2012-10-18 5:53 ` Gavin Shan
0 siblings, 1 reply; 2+ messages in thread
From: Gavin Shan @ 2012-10-18 2:46 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Gavin Shan
There're couples of functions defined to print debugging messages
during initializing P7IOC. However, we got bogus output from those
functions like pe_info(). The problem here is that the message
level (the first parameter to printk()) isn't printable and that
caused the bogus output.
The patch fixes the issue by merging __pe_printk() to the macro
define_pe_printk_level() so that we can pass the message level
directly to printk().
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
---
arch/powerpc/platforms/powernv/pci-ioda.c | 25 +++++++++++--------------
1 files changed, 11 insertions(+), 14 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 07ce33c..ff7e7a1 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -34,24 +34,12 @@
#include "powernv.h"
#include "pci.h"
-static int __pe_printk(const char *level, const struct pnv_ioda_pe *pe,
- struct va_format *vaf)
-{
- char pfix[32];
-
- if (pe->pdev)
- strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix));
- else
- sprintf(pfix, "%04x:%02x ",
- pci_domain_nr(pe->pbus), pe->pbus->number);
- return printk("pci %s%s: [PE# %.3d] %pV", level, pfix, pe->pe_number, vaf);
-}
-
#define define_pe_printk_level(func, kern_level) \
static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \
{ \
struct va_format vaf; \
va_list args; \
+ char pfix[32]; \
int r; \
\
va_start(args, fmt); \
@@ -59,7 +47,16 @@ static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \
vaf.fmt = fmt; \
vaf.va = &args; \
\
- r = __pe_printk(kern_level, pe, &vaf); \
+ if (pe->pdev) \
+ strlcpy(pfix, dev_name(&pe->pdev->dev), \
+ sizeof(pfix)); \
+ else \
+ sprintf(pfix, "%04x:%02x ", \
+ pci_domain_nr(pe->pbus), \
+ pe->pbus->number); \
+ r = printk(kern_level "pci %s: [PE# %.3d] %pV", \
+ pfix, pe->pe_number, &vaf); \
+ \
va_end(args); \
\
return r; \
--
1.7.5.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] powerpc/pnv: Avoid bogus output
2012-10-18 2:46 [PATCH] powerpc/pnv: Avoid bogus output Gavin Shan
@ 2012-10-18 5:53 ` Gavin Shan
0 siblings, 0 replies; 2+ messages in thread
From: Gavin Shan @ 2012-10-18 5:53 UTC (permalink / raw)
To: Gavin Shan; +Cc: linuxppc-dev
[-- Attachment #1: Type: text/plain, Size: 2439 bytes --]
On Thu, Oct 18, 2012 at 10:46:44AM +0800, Gavin Shan wrote:
>There're couples of functions defined to print debugging messages
>during initializing P7IOC. However, we got bogus output from those
>functions like pe_info(). The problem here is that the message
>level (the first parameter to printk()) isn't printable and that
>caused the bogus output.
>
>The patch fixes the issue by merging __pe_printk() to the macro
>define_pe_printk_level() so that we can pass the message level
>directly to printk().
>
>Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
>---
> arch/powerpc/platforms/powernv/pci-ioda.c | 25 +++++++++++--------------
> 1 files changed, 11 insertions(+), 14 deletions(-)
>
>diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
>index 07ce33c..ff7e7a1 100644
>--- a/arch/powerpc/platforms/powernv/pci-ioda.c
>+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
>@@ -34,24 +34,12 @@
> #include "powernv.h"
> #include "pci.h"
>
>-static int __pe_printk(const char *level, const struct pnv_ioda_pe *pe,
>- struct va_format *vaf)
>-{
>- char pfix[32];
>-
>- if (pe->pdev)
>- strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix));
>- else
>- sprintf(pfix, "%04x:%02x ",
>- pci_domain_nr(pe->pbus), pe->pbus->number);
>- return printk("pci %s%s: [PE# %.3d] %pV", level, pfix, pe->pe_number, vaf);
>-}
>-
> #define define_pe_printk_level(func, kern_level) \
> static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \
> { \
> struct va_format vaf; \
> va_list args; \
>+ char pfix[32]; \
> int r; \
> \
> va_start(args, fmt); \
>@@ -59,7 +47,16 @@ static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \
> vaf.fmt = fmt; \
> vaf.va = &args; \
> \
>- r = __pe_printk(kern_level, pe, &vaf); \
>+ if (pe->pdev) \
>+ strlcpy(pfix, dev_name(&pe->pdev->dev), \
>+ sizeof(pfix)); \
>+ else \
>+ sprintf(pfix, "%04x:%02x ", \
>+ pci_domain_nr(pe->pbus), \
The space before sprintf() should be replaced by "tab" as
the attached patch :-)
>+ pe->pbus->number); \
>+ r = printk(kern_level "pci %s: [PE# %.3d] %pV", \
>+ pfix, pe->pe_number, &vaf); \
>+ \
> va_end(args); \
> \
> return r; \
Thanks,
Gavin
[-- Attachment #2: 0001-powerpc-pnv-Avoid-bogus-output.patch --]
[-- Type: text/x-diff, Size: 2392 bytes --]
>From 4ee539b85676c986122087fe84d59e3b764396d5 Mon Sep 17 00:00:00 2001
From: Gavin Shan <shangw@linux.vnet.ibm.com>
Date: Thu, 18 Oct 2012 10:09:12 +0800
Subject: [PATCH] powerpc/pnv: Avoid bogus output
There're couples of functions defined to print debugging messages
during initializing P7IOC. However, we got bogus output from those
functions like pe_info(). The problem here is that the message
level (the first parameter to printk()) isn't printable and that
caused the bogus output.
The patch fixes the issue by merging __pe_printk() to the macro
define_pe_printk_level() so that we can pass the message level
directly to printk().
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
---
arch/powerpc/platforms/powernv/pci-ioda.c | 25 +++++++++++--------------
1 files changed, 11 insertions(+), 14 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 07ce33c..7687778 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -34,24 +34,12 @@
#include "powernv.h"
#include "pci.h"
-static int __pe_printk(const char *level, const struct pnv_ioda_pe *pe,
- struct va_format *vaf)
-{
- char pfix[32];
-
- if (pe->pdev)
- strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix));
- else
- sprintf(pfix, "%04x:%02x ",
- pci_domain_nr(pe->pbus), pe->pbus->number);
- return printk("pci %s%s: [PE# %.3d] %pV", level, pfix, pe->pe_number, vaf);
-}
-
#define define_pe_printk_level(func, kern_level) \
static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \
{ \
struct va_format vaf; \
va_list args; \
+ char pfix[32]; \
int r; \
\
va_start(args, fmt); \
@@ -59,7 +47,16 @@ static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \
vaf.fmt = fmt; \
vaf.va = &args; \
\
- r = __pe_printk(kern_level, pe, &vaf); \
+ if (pe->pdev) \
+ strlcpy(pfix, dev_name(&pe->pdev->dev), \
+ sizeof(pfix)); \
+ else \
+ sprintf(pfix, "%04x:%02x ", \
+ pci_domain_nr(pe->pbus), \
+ pe->pbus->number); \
+ r = printk(kern_level "pci %s: [PE# %.3d] %pV", \
+ pfix, pe->pe_number, &vaf); \
+ \
va_end(args); \
\
return r; \
--
1.7.5.4
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