* [PATCH] ppc, vio fix modalias_show return values
@ 2013-09-23 13:16 Prarit Bhargava
0 siblings, 0 replies; 2+ messages in thread
From: Prarit Bhargava @ 2013-09-23 13:16 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Prarit Bhargava
modalias_show() should return an empty string on error, not -ENODEV.
This causes the following false and annoying error:
> find /sys/devices -name modalias -print0 | xargs -0 cat >/dev/null
cat: /sys/devices/vio/4000/modalias: No such device
cat: /sys/devices/vio/4001/modalias: No such device
cat: /sys/devices/vio/4002/modalias: No such device
cat: /sys/devices/vio/4004/modalias: No such device
cat: /sys/devices/vio/modalias: No such device
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
---
arch/powerpc/kernel/vio.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 78a3506..d38cc08 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1530,11 +1530,15 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
const char *cp;
dn = dev->of_node;
- if (!dn)
- return -ENODEV;
+ if (!dn) {
+ strcat(buf, "\n");
+ return strlen(buf);
+ }
cp = of_get_property(dn, "compatible", NULL);
- if (!cp)
- return -ENODEV;
+ if (!cp) {
+ strcat(buf, "\n");
+ return strlen(buf);
+ }
return sprintf(buf, "vio:T%sS%s\n", vio_dev->type, cp);
}
--
1.7.9.3
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH] ppc, vio fix modalias_show return values
@ 2013-09-23 13:33 Prarit Bhargava
0 siblings, 0 replies; 2+ messages in thread
From: Prarit Bhargava @ 2013-09-23 13:33 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Prarit Bhargava, Steve Best, Paul Mackerras
[2nd try at this ... 1st one seems to have gone AWOL]
modalias_show() should return an empty string on error, not -ENODEV.
This causes the following false and annoying error:
> find /sys/devices -name modalias -print0 | xargs -0 cat >/dev/null
cat: /sys/devices/vio/4000/modalias: No such device
cat: /sys/devices/vio/4001/modalias: No such device
cat: /sys/devices/vio/4002/modalias: No such device
cat: /sys/devices/vio/4004/modalias: No such device
cat: /sys/devices/vio/modalias: No such device
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steve Best <sbest@us.ibm.com>
---
arch/powerpc/kernel/vio.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 78a3506..d38cc08 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1530,11 +1530,15 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
const char *cp;
dn = dev->of_node;
- if (!dn)
- return -ENODEV;
+ if (!dn) {
+ strcat(buf, "\n");
+ return strlen(buf);
+ }
cp = of_get_property(dn, "compatible", NULL);
- if (!cp)
- return -ENODEV;
+ if (!cp) {
+ strcat(buf, "\n");
+ return strlen(buf);
+ }
return sprintf(buf, "vio:T%sS%s\n", vio_dev->type, cp);
}
--
1.7.9.3
^ permalink raw reply related [flat|nested] 2+ messages in thread
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