"sd" and "err" are too common names to be used in macros for local variables.
Prefix them with an underscore to avoid name clashing.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
---
v2:
as suggested by Mauro, also patched v4l2_device_call_all and
v4l2_device_call_until_err, as well as ivtv and cx18 specific macros
drivers/media/video/cx18/cx18-driver.h | 19 +++++++---
drivers/media/video/ivtv/ivtv-driver.h | 14 ++++++--
include/media/v4l2-device.h | 57 ++++++++++++++++++++++----------
3 files changed, 63 insertions(+), 27 deletions(-)
diff --git a/drivers/media/video/cx18/cx18-driver.h b/drivers/media/video/cx18/cx18-driver.h
index 9bc51a9..7e43c7b 100644
--- a/drivers/media/video/cx18/cx18-driver.h
+++ b/drivers/media/video/cx18/cx18-driver.h
@@ -674,18 +674,25 @@ static inline int cx18_raw_vbi(const struct cx18 *cx)
/* Call the specified callback for all subdevs with a grp_id bit matching the
* mask in hw (if 0, then match them all). Ignore any errors. */
-#define cx18_call_hw(cx, hw, o, f, args...) \
- __v4l2_device_call_subdevs(&(cx)->v4l2_dev, \
- !(hw) || (sd->grp_id & (hw)), o, f , ##args)
+#define cx18_call_hw(cx, hw, o, f, args...) \
+ do { \
+ struct v4l2_subdev *__sd; \
+ __v4l2_device_call_subdevs_p(&(cx)->v4l2_dev, __sd, \
+ !(hw) || (__sd->grp_id & (hw)), o, f , ##args); \
+ } while (0)
#define cx18_call_all(cx, o, f, args...) cx18_call_hw(cx, 0, o, f , ##args)
/* Call the specified callback for all subdevs with a grp_id bit matching the
* mask in hw (if 0, then match them all). If the callback returns an error
* other than 0 or -ENOIOCTLCMD, then return with that error code. */
-#define cx18_call_hw_err(cx, hw, o, f, args...) \
- __v4l2_device_call_subdevs_until_err( \
- &(cx)->v4l2_dev, !(hw) || (sd->grp_id & (hw)), o, f , ##args)
+#define cx18_call_hw_err(cx, hw, o, f, args...) \
+({ \
+ struct v4l2_subdev *__sd; \
+ __v4l2_device_call_subdevs_until_err_p(&(cx)->v4l2_dev, \
+ __sd, !(hw) || (__sd->grp_id & (hw)), o, f, \
+ ##args); \
+})
#define cx18_call_all_err(cx, o, f, args...) \
cx18_call_hw_err(cx, 0, o, f , ##args)
diff --git a/drivers/media/video/ivtv/ivtv-driver.h b/drivers/media/video/ivtv/ivtv-driver.h
index 7580314..e61252c 100644
--- a/drivers/media/video/ivtv/ivtv-driver.h
+++ b/drivers/media/video/ivtv/ivtv-driver.h
@@ -811,15 +811,23 @@ static inline int ivtv_raw_vbi(const struct ivtv *itv)
/* Call the specified callback for all subdevs matching hw (if 0, then
match them all). Ignore any errors. */
#define ivtv_call_hw(itv, hw, o, f, args...) \
- __v4l2_device_call_subdevs(&(itv)->v4l2_dev, !(hw) || (sd->grp_id & (hw)), o, f , ##args)
+ do { \
+ struct v4l2_subdev *__sd; \
+ __v4l2_device_call_subdevs_p(&(itv)->v4l2_dev, __sd, \
+ !(hw) || (__sd->grp_id & (hw)), o, f , ##args); \
+ } while (0)
#define ivtv_call_all(itv, o, f, args...) ivtv_call_hw(itv, 0, o, f , ##args)
/* Call the specified callback for all subdevs matching hw (if 0, then
match them all). If the callback returns an error other than 0 or
-ENOIOCTLCMD, then return with that error code. */
-#define ivtv_call_hw_err(itv, hw, o, f, args...) \
- __v4l2_device_call_subdevs_until_err(&(itv)->v4l2_dev, !(hw) || (sd->grp_id & (hw)), o, f , ##args)
+#define ivtv_call_hw_err(itv, hw, o, f, args...) \
+({ \
+ struct v4l2_subdev *__sd; \
+ __v4l2_device_call_subdevs_until_err_p(&(itv)->v4l2_dev, __sd, \
+ !(hw) || (__sd->grp_id & (hw)), o, f , ##args); \
+})
#define ivtv_call_all_err(itv, o, f, args...) ivtv_call_hw_err(itv, 0, o, f , ##args)
diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h
index 8bcbd7a..fe10464 100644
--- a/include/media/v4l2-device.h
+++ b/include/media/v4l2-device.h
@@ -101,46 +101,67 @@ void v4l2_device_unregister_subdev(struct v4l2_subdev *sd);
/* Call the specified callback for all subdevs matching the condition.
Ignore any errors. Note that you cannot add or delete a subdev
while walking the subdevs list. */
-#define __v4l2_device_call_subdevs(v4l2_dev, cond, o, f, args...) \
+#define __v4l2_device_call_subdevs_p(v4l2_dev, sd, cond, o, f, args...) \
do { \
- struct v4l2_subdev *sd; \
+ list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) \
+ if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \
+ (sd)->ops->o->f((sd) , ##args); \
+ } while (0)
+
+#define __v4l2_device_call_subdevs(v4l2_dev, cond, o, f, args...) \
+ do { \
+ struct v4l2_subdev *__sd; \
\
- list_for_each_entry(sd, &(v4l2_dev)->subdevs, list) \
- if ((cond) && sd->ops->o && sd->ops->o->f) \
- sd->ops->o->f(sd , ##args); \
+ __v4l2_device_call_subdevs_p(v4l2_dev, __sd, cond, o, \
+ f , ##args); \
} while (0)
/* Call the specified callback for all subdevs matching the condition.
If the callback returns an error other than 0 or -ENOIOCTLCMD, then
return with that error code. Note that you cannot add or delete a
subdev while walking the subdevs list. */
-#define __v4l2_device_call_subdevs_until_err(v4l2_dev, cond, o, f, args...) \
+#define __v4l2_device_call_subdevs_until_err_p(v4l2_dev, sd, cond, o, f, args...) \
({ \
- struct v4l2_subdev *sd; \
- long err = 0; \
+ long __err = 0; \
\
- list_for_each_entry(sd, &(v4l2_dev)->subdevs, list) { \
- if ((cond) && sd->ops->o && sd->ops->o->f) \
- err = sd->ops->o->f(sd , ##args); \
- if (err && err != -ENOIOCTLCMD) \
+ list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) { \
+ if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \
+ __err = (sd)->ops->o->f((sd) , ##args); \
+ if (__err && __err != -ENOIOCTLCMD) \
break; \
} \
- (err == -ENOIOCTLCMD) ? 0 : err; \
+ (__err == -ENOIOCTLCMD) ? 0 : __err; \
+})
+
+#define __v4l2_device_call_subdevs_until_err(v4l2_dev, cond, o, f, args...) \
+({ \
+ struct v4l2_subdev *__sd; \
+ __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, cond, o, \
+ f, args...); \
})
/* Call the specified callback for all subdevs matching grp_id (if 0, then
match them all). Ignore any errors. Note that you cannot add or delete
a subdev while walking the subdevs list. */
-#define v4l2_device_call_all(v4l2_dev, grpid, o, f, args...) \
- __v4l2_device_call_subdevs(v4l2_dev, \
- !(grpid) || sd->grp_id == (grpid), o, f , ##args)
+#define v4l2_device_call_all(v4l2_dev, grpid, o, f, args...) \
+ do { \
+ struct v4l2_subdev *__sd; \
+ \
+ __v4l2_device_call_subdevs_p(v4l2_dev, __sd, \
+ !(grpid) || __sd->grp_id == (grpid), o, f , \
+ ##args); \
+ } while (0)
/* Call the specified callback for all subdevs matching grp_id (if 0, then
match them all). If the callback returns an error other than 0 or
-ENOIOCTLCMD, then return with that error code. Note that you cannot
add or delete a subdev while walking the subdevs list. */
#define v4l2_device_call_until_err(v4l2_dev, grpid, o, f, args...) \
- __v4l2_device_call_subdevs_until_err(v4l2_dev, \
- !(grpid) || sd->grp_id == (grpid), o, f , ##args)
+({ \
+ struct v4l2_subdev *__sd; \
+ __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \
+ !(grpid) || __sd->grp_id == (grpid), o, f , \
+ ##args); \
+})
#endif
--
1.7.2
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