* [patch 1/2 -next] hid-lg4ff: silence sparse complaint
@ 2011-08-18 13:42 ` Dan Carpenter
0 siblings, 0 replies; 6+ messages in thread
From: Dan Carpenter @ 2011-08-18 13:42 UTC (permalink / raw)
To: Jiri Kosina; +Cc: open list:HID CORE LAYER, kernel-janitors
Sparse complains that:
drivers/hid/hid-lg4ff.c:288:44: warning: Using plain integer as NULL pointer
drivers/hid/hid-lg4ff.c:311:44: warning: Using plain integer as NULL pointer
Signed-off-by: Dan Carpenter <error27@gmail.com>
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index dc38c2d..2d8762d 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -285,7 +285,7 @@ static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_n
/* Read current range and display it in terminal */
static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct lg4ff_device_entry *entry = 0;
+ struct lg4ff_device_entry *uninitialized_var(entry);
struct list_head *h;
struct hid_device *hid = to_hid_device(dev);
size_t count;
@@ -308,7 +308,7 @@ static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *att
* according to the type of the wheel */
static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
- struct lg4ff_device_entry *entry = 0;
+ struct lg4ff_device_entry *uninitialized_var(entry);
struct list_head *h;
struct hid_device *hid = to_hid_device(dev);
__u16 range = simple_strtoul(buf, NULL, 10);
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [patch 1/2 -next] hid-lg4ff: silence sparse complaint
@ 2011-08-18 13:42 ` Dan Carpenter
0 siblings, 0 replies; 6+ messages in thread
From: Dan Carpenter @ 2011-08-18 13:42 UTC (permalink / raw)
To: Jiri Kosina; +Cc: open list:HID CORE LAYER, kernel-janitors
Sparse complains that:
drivers/hid/hid-lg4ff.c:288:44: warning: Using plain integer as NULL pointer
drivers/hid/hid-lg4ff.c:311:44: warning: Using plain integer as NULL pointer
Signed-off-by: Dan Carpenter <error27@gmail.com>
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index dc38c2d..2d8762d 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -285,7 +285,7 @@ static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_n
/* Read current range and display it in terminal */
static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct lg4ff_device_entry *entry = 0;
+ struct lg4ff_device_entry *uninitialized_var(entry);
struct list_head *h;
struct hid_device *hid = to_hid_device(dev);
size_t count;
@@ -308,7 +308,7 @@ static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *att
* according to the type of the wheel */
static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
- struct lg4ff_device_entry *entry = 0;
+ struct lg4ff_device_entry *uninitialized_var(entry);
struct list_head *h;
struct hid_device *hid = to_hid_device(dev);
__u16 range = simple_strtoul(buf, NULL, 10);
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [patch 1/2 -next] hid-lg4ff: silence sparse complaint
[not found] ` <CAMvewQJ=6-3LgDwAEgJ6TaQSBWiSC5ZTb-14V60ZN0Lh2TYbAQ@mail.gmail.com>
@ 2011-08-18 16:21 ` Dan Carpenter
0 siblings, 0 replies; 6+ messages in thread
From: Dan Carpenter @ 2011-08-18 16:21 UTC (permalink / raw)
To: Zic Rim; +Cc: Jiri Kosina, open list:HID CORE LAYER, kernel-janitors
On Thu, Aug 18, 2011 at 07:50:45PM +0530, Zic Rim wrote:
> > device_attribute *attr, char *buf)
> > {
> > - struct lg4ff_device_entry *entry = 0;
> > + struct lg4ff_device_entry *uninitialized_var(entry);
> >
>
> I think this is better struct lg4ff_device_entry *entry = NULL ;
>
We only have the initialization to silence a gcc warning. My way is
more explicit. If we set entry = NULL then other static analysis
tools complain about a potential NULL dereference.
regards,
dan carpenter
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [patch 1/2 -next] hid-lg4ff: silence sparse complaint
@ 2011-08-18 16:21 ` Dan Carpenter
0 siblings, 0 replies; 6+ messages in thread
From: Dan Carpenter @ 2011-08-18 16:21 UTC (permalink / raw)
To: Zic Rim; +Cc: Jiri Kosina, open list:HID CORE LAYER, kernel-janitors
On Thu, Aug 18, 2011 at 07:50:45PM +0530, Zic Rim wrote:
> > device_attribute *attr, char *buf)
> > {
> > - struct lg4ff_device_entry *entry = 0;
> > + struct lg4ff_device_entry *uninitialized_var(entry);
> >
>
> I think this is better struct lg4ff_device_entry *entry = NULL ;
>
We only have the initialization to silence a gcc warning. My way is
more explicit. If we set entry = NULL then other static analysis
tools complain about a potential NULL dereference.
regards,
dan carpenter
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [patch 1/2 -next] hid-lg4ff: silence sparse complaint
2011-08-18 13:42 ` Dan Carpenter
@ 2011-08-23 8:43 ` Jiri Kosina
-1 siblings, 0 replies; 6+ messages in thread
From: Jiri Kosina @ 2011-08-23 8:43 UTC (permalink / raw)
To: Dan Carpenter; +Cc: open list:HID CORE LAYER, kernel-janitors
On Thu, 18 Aug 2011, Dan Carpenter wrote:
> Sparse complains that:
> drivers/hid/hid-lg4ff.c:288:44: warning: Using plain integer as NULL pointer
> drivers/hid/hid-lg4ff.c:311:44: warning: Using plain integer as NULL pointer
>
> Signed-off-by: Dan Carpenter <error27@gmail.com>
>
> diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
> index dc38c2d..2d8762d 100644
> --- a/drivers/hid/hid-lg4ff.c
> +++ b/drivers/hid/hid-lg4ff.c
> @@ -285,7 +285,7 @@ static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_n
> /* Read current range and display it in terminal */
> static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
> {
> - struct lg4ff_device_entry *entry = 0;
> + struct lg4ff_device_entry *uninitialized_var(entry);
> struct list_head *h;
> struct hid_device *hid = to_hid_device(dev);
> size_t count;
> @@ -308,7 +308,7 @@ static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *att
> * according to the type of the wheel */
> static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
> {
> - struct lg4ff_device_entry *entry = 0;
> + struct lg4ff_device_entry *uninitialized_var(entry);
> struct list_head *h;
> struct hid_device *hid = to_hid_device(dev);
> __u16 range = simple_strtoul(buf, NULL, 10);
Applied.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [patch 1/2 -next] hid-lg4ff: silence sparse complaint
@ 2011-08-23 8:43 ` Jiri Kosina
0 siblings, 0 replies; 6+ messages in thread
From: Jiri Kosina @ 2011-08-23 8:43 UTC (permalink / raw)
To: Dan Carpenter; +Cc: open list:HID CORE LAYER, kernel-janitors
On Thu, 18 Aug 2011, Dan Carpenter wrote:
> Sparse complains that:
> drivers/hid/hid-lg4ff.c:288:44: warning: Using plain integer as NULL pointer
> drivers/hid/hid-lg4ff.c:311:44: warning: Using plain integer as NULL pointer
>
> Signed-off-by: Dan Carpenter <error27@gmail.com>
>
> diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
> index dc38c2d..2d8762d 100644
> --- a/drivers/hid/hid-lg4ff.c
> +++ b/drivers/hid/hid-lg4ff.c
> @@ -285,7 +285,7 @@ static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_n
> /* Read current range and display it in terminal */
> static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
> {
> - struct lg4ff_device_entry *entry = 0;
> + struct lg4ff_device_entry *uninitialized_var(entry);
> struct list_head *h;
> struct hid_device *hid = to_hid_device(dev);
> size_t count;
> @@ -308,7 +308,7 @@ static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *att
> * according to the type of the wheel */
> static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
> {
> - struct lg4ff_device_entry *entry = 0;
> + struct lg4ff_device_entry *uninitialized_var(entry);
> struct list_head *h;
> struct hid_device *hid = to_hid_device(dev);
> __u16 range = simple_strtoul(buf, NULL, 10);
Applied.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-08-23 8:43 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2011-08-18 13:42 [patch 1/2 -next] hid-lg4ff: silence sparse complaint Dan Carpenter
2011-08-18 13:42 ` Dan Carpenter
[not found] ` <CAMvewQJ=6-3LgDwAEgJ6TaQSBWiSC5ZTb-14V60ZN0Lh2TYbAQ@mail.gmail.com>
2011-08-18 16:21 ` Dan Carpenter
2011-08-18 16:21 ` Dan Carpenter
2011-08-23 8:43 ` Jiri Kosina
2011-08-23 8:43 ` Jiri Kosina
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