[PATCH v5 11/12] media: uvcvideo: New macro uvc_trace_cont

Ricardo Ribalda
2020-12-21T18:40:38Z

Remove all the duplicated code around printk(KERN_CONT, with a new macro.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
drivers/media/usb/uvc/uvc_driver.c | 57 +++++++++++-------------------
drivers/media/usb/uvc/uvcvideo.h | 6 ++++
2 files changed, 27 insertions(+), 36 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index c98d57680e5c..ea64c716f1f3 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1686,8 +1686,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
{
switch (UVC_ENTITY_TYPE(entity)) {
case UVC_VC_EXTENSION_UNIT:
- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT " <- XU %d", entity->id);
+ uvc_trace_cont(UVC_TRACE_PROBE, " <- XU %d", entity->id);

if (entity->bNrInPins != 1) {
uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
@@ -1698,8 +1697,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
break;

case UVC_VC_PROCESSING_UNIT:
- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT " <- PU %d", entity->id);
+ uvc_trace_cont(UVC_TRACE_PROBE, " <- PU %d", entity->id);

if (chain->processing != NULL) {
uvc_trace(UVC_TRACE_DESCR, "Found multiple "
@@ -1711,8 +1709,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
break;

case UVC_VC_SELECTOR_UNIT:
- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT " <- SU %d", entity->id);
+ uvc_trace_cont(UVC_TRACE_PROBE, " <- SU %d", entity->id);

/* Single-input selector units are ignored. */
if (entity->bNrInPins == 1)
@@ -1730,27 +1727,22 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
case UVC_ITT_VENDOR_SPECIFIC:
case UVC_ITT_CAMERA:
case UVC_ITT_MEDIA_TRANSPORT_INPUT:
- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT " <- IT %d\n", entity->id);
+ uvc_trace_cont(UVC_TRACE_PROBE, " <- IT %d\n", entity->id);

break;

case UVC_OTT_VENDOR_SPECIFIC:
case UVC_OTT_DISPLAY:
case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT " OT %d", entity->id);
+ uvc_trace_cont(UVC_TRACE_PROBE, " OT %d", entity->id);

break;

case UVC_TT_STREAMING:
- if (UVC_ENTITY_IS_ITERM(entity)) {
- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT " <- IT %d\n", entity->id);
- } else {
- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT " OT %d", entity->id);
- }
+ if (UVC_ENTITY_IS_ITERM(entity))
+ uvc_trace_cont(UVC_TRACE_PROBE, " <- IT %d\n", entity->id);
+ else
+ uvc_trace_cont(UVC_TRACE_PROBE, " OT %d", entity->id);

break;

@@ -1797,13 +1789,11 @@ static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
}

list_add_tail(&forward->chain, &chain->entities);
- if (uvc_trace_param & UVC_TRACE_PROBE) {
- if (!found)
- printk(KERN_CONT " (->");
+ if (!found)
+ uvc_trace_cont(UVC_TRACE_PROBE, " (->");

- printk(KERN_CONT " XU %d", forward->id);
- found = 1;
- }
+ uvc_trace_cont(UVC_TRACE_PROBE, " XU %d", forward->id);
+ found = 1;
break;

case UVC_OTT_VENDOR_SPECIFIC:
@@ -1817,18 +1807,16 @@ static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
}

list_add_tail(&forward->chain, &chain->entities);
- if (uvc_trace_param & UVC_TRACE_PROBE) {
- if (!found)
- printk(KERN_CONT " (->");
+ if (!found)
+ uvc_trace_cont(UVC_TRACE_PROBE, " (->");

- printk(KERN_CONT " OT %d", forward->id);
- found = 1;
- }
+ uvc_trace_cont(UVC_TRACE_PROBE, " OT %d", forward->id);
+ found = 1;
break;
}
}
if (found)
- printk(KERN_CONT ")");
+ uvc_trace_cont(UVC_TRACE_PROBE, ")");

return 0;
}
@@ -1853,8 +1841,7 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
break;
}

- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT " <- IT");
+ uvc_trace_cont(UVC_TRACE_PROBE, " <- IT");

chain->selector = entity;
for (i = 0; i < entity->bNrInPins; ++i) {
@@ -1874,15 +1861,13 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
return -EINVAL;
}

- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT " %d", term->id);
+ uvc_trace_cont(UVC_TRACE_PROBE, " %d", term->id);

list_add_tail(&term->chain, &chain->entities);
uvc_scan_chain_forward(chain, term, entity);
}

- if (uvc_trace_param & UVC_TRACE_PROBE)
- printk(KERN_CONT "\n");
+ uvc_trace_cont(UVC_TRACE_PROBE, "\n");

id = 0;
break;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index a4ebd56bb987..4a7d1fb76eee 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -763,6 +763,12 @@ do { \
printk(KERN_DEBUG "uvcvideo: " fmt, ##__VA_ARGS__); \
} while (0)

+#define uvc_trace_cont(flag, fmt, ...) \
+do { \
+ if (uvc_trace_param & flag) \
+ pr_cont(fmt, ##__VA_ARGS__); \
+} while (0)
+
#define uvc_warn_once(_dev, warn, fmt, ...) \
do { \
if (!test_and_set_bit(warn, &(_dev)->warnings)) \
--
2.29.2.684.gfbc64c5ab5-goog