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Message-ID: <87769d554b4575bf9371380b013e66d70f1b21c4.camel@perches.com>
Date: Wed, 04 Nov 2020 11:29:30 -0800
From: Joe Perches <joe@...ches.com>
To: Ricardo Ribalda <ribalda@...omium.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/7] media: uvcvideo: Use pr_cont() macro
On Wed, 2020-11-04 at 19:07 +0100, Ricardo Ribalda wrote:
> Replace all the uses of printk(KERN_CONT ... with pr_cont().
Perhaps remove the uvc_printk macro and uses and use the more
common pr_fmt and pr_<level> mechanisms.
Something like:
---
drivers/media/usb/uvc/uvc_ctrl.c | 5 +++--
drivers/media/usb/uvc/uvc_driver.c | 35 +++++++++++++++------------------
drivers/media/usb/uvc/uvc_entity.c | 10 ++++++----
drivers/media/usb/uvc/uvc_status.c | 9 +++++----
drivers/media/usb/uvc/uvc_video.c | 40 ++++++++++++++++----------------------
drivers/media/usb/uvc/uvcvideo.h | 25 +++++++++++-------------
6 files changed, 58 insertions(+), 66 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index f479d8971dfb..e0b273697d49 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -6,6 +6,8 @@
* Laurent Pinchart (laurent.pinchart@...asonboard.com)
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -1317,8 +1319,7 @@ static void uvc_ctrl_status_event_work(struct work_struct *work)
w->urb->interval = dev->int_ep->desc.bInterval;
ret = usb_submit_urb(w->urb, GFP_KERNEL);
if (ret < 0)
- uvc_printk(KERN_ERR, "Failed to resubmit status URB (%d).\n",
- ret);
+ pr_err("Failed to resubmit status URB (%d)\n", ret);
}
bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain,
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index ddb9eaa11be7..03d68e2b6b70 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -6,6 +6,8 @@
* Laurent Pinchart (laurent.pinchart@...asonboard.com)
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/atomic.h>
#include <linux/kernel.h>
#include <linux/list.h>
@@ -534,8 +536,7 @@ static int uvc_parse_format(struct uvc_device *dev,
sizeof(format->name));
format->fcc = fmtdesc->fcc;
} else {
- uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
- &buffer[5]);
+ pr_info("Unknown video format %pUl\n", &buffer[5]);
snprintf(format->name, sizeof(format->name), "%pUl\n",
&buffer[5]);
format->fcc = 0;
@@ -1925,7 +1926,7 @@ static int uvc_scan_device(struct uvc_device *dev)
uvc_scan_fallback(dev);
if (list_empty(&dev->chains)) {
- uvc_printk(KERN_INFO, "No valid video chain found.\n");
+ pr_info("No valid video chain found\n");
return -1;
}
@@ -2077,8 +2078,8 @@ int uvc_register_video_device(struct uvc_device *dev,
ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
if (ret < 0) {
- uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n",
- v4l2_type_names[type], ret);
+ pr_err("Failed to register %s device (%d)\n",
+ v4l2_type_names[type], ret);
return ret;
}
@@ -2094,8 +2095,7 @@ static int uvc_register_video(struct uvc_device *dev,
/* Initialize the streaming interface with default parameters. */
ret = uvc_video_init(stream);
if (ret < 0) {
- uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n",
- ret);
+ pr_err("Failed to initialize the device (%d)\n", ret);
return ret;
}
@@ -2129,8 +2129,8 @@ static int uvc_register_terms(struct uvc_device *dev,
stream = uvc_stream_by_id(dev, term->id);
if (stream == NULL) {
- uvc_printk(KERN_INFO, "No streaming interface found "
- "for terminal %u.", term->id);
+ pr_info("No streaming interface found for terminal %u\n",
+ term->id);
continue;
}
@@ -2163,8 +2163,7 @@ static int uvc_register_chains(struct uvc_device *dev)
#ifdef CONFIG_MEDIA_CONTROLLER
ret = uvc_mc_register_entities(chain);
if (ret < 0)
- uvc_printk(KERN_INFO,
- "Failed to register entities (%d).\n", ret);
+ pr_info("Failed to register entities (%d)\n", ret);
#endif
}
@@ -2261,17 +2260,16 @@ static int uvc_probe(struct usb_interface *intf,
goto error;
}
- uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
+ pr_info("Found UVC %u.%02x device %s (%04x:%04x)\n",
dev->uvc_version >> 8, dev->uvc_version & 0xff,
udev->product ? udev->product : "<unnamed>",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
if (dev->quirks != dev->info->quirks) {
- uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
- "parameter for testing purpose.\n", dev->quirks);
- uvc_printk(KERN_INFO, "Please report required quirks to the "
- "linux-uvc-devel mailing list.\n");
+ pr_info("Forcing device quirks to 0x%x by module parameter for testing purpose\n",
+ dev->quirks);
+ pr_info("Please report required quirks to the linux-uvc-devel mailing list\n");
}
/* Register the V4L2 device. */
@@ -2300,9 +2298,8 @@ static int uvc_probe(struct usb_interface *intf,
/* Initialize the interrupt URB. */
if ((ret = uvc_status_init(dev)) < 0) {
- uvc_printk(KERN_INFO, "Unable to initialize the status "
- "endpoint (%d), status interrupt will not be "
- "supported.\n", ret);
+ pr_info("Unable to initialize the status endpoint (%d), status interrupt will not be supported\n",
+ ret);
}
uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c
index ca3a9c2eec27..a5c11cde273c 100644
--- a/drivers/media/usb/uvc/uvc_entity.c
+++ b/drivers/media/usb/uvc/uvc_entity.c
@@ -6,6 +6,8 @@
* Laurent Pinchart (laurent.pinchart@...asonboard.com)
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/videodev2.h>
@@ -139,8 +141,8 @@ int uvc_mc_register_entities(struct uvc_video_chain *chain)
list_for_each_entry(entity, &chain->entities, chain) {
ret = uvc_mc_init_entity(chain, entity);
if (ret < 0) {
- uvc_printk(KERN_INFO, "Failed to initialize entity for "
- "entity %u\n", entity->id);
+ pr_info("Failed to initialize entity for entity %u\n",
+ entity->id);
return ret;
}
}
@@ -148,8 +150,8 @@ int uvc_mc_register_entities(struct uvc_video_chain *chain)
list_for_each_entry(entity, &chain->entities, chain) {
ret = uvc_mc_create_links(chain, entity);
if (ret < 0) {
- uvc_printk(KERN_INFO, "Failed to create links for "
- "entity %u\n", entity->id);
+ pr_info("Failed to create links for entity %u\n",
+ entity->id);
return ret;
}
}
diff --git a/drivers/media/usb/uvc/uvc_status.c b/drivers/media/usb/uvc/uvc_status.c
index 2bdb0ff203f8..4c84525ada71 100644
--- a/drivers/media/usb/uvc/uvc_status.c
+++ b/drivers/media/usb/uvc/uvc_status.c
@@ -6,6 +6,8 @@
* Laurent Pinchart (laurent.pinchart@...asonboard.com)
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/slab.h>
@@ -208,8 +210,8 @@ static void uvc_status_complete(struct urb *urb)
return;
default:
- uvc_printk(KERN_WARNING, "Non-zero status (%d) in status "
- "completion handler.\n", urb->status);
+ pr_warn("Non-zero status (%d) in status completion handler\n",
+ urb->status);
return;
}
@@ -244,8 +246,7 @@ static void uvc_status_complete(struct urb *urb)
/* Resubmit the URB. */
urb->interval = dev->int_ep->desc.bInterval;
if ((ret = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
- uvc_printk(KERN_ERR, "Failed to resubmit status URB (%d).\n",
- ret);
+ pr_err("Failed to resubmit status URB (%d)\n", ret);
}
}
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index a6a441d92b94..6d48bcdeac16 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -6,6 +6,8 @@
* Laurent Pinchart (laurent.pinchart@...asonboard.com)
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -76,9 +78,8 @@ int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
if (likely(ret == size))
return 0;
- uvc_printk(KERN_ERR,
- "Failed to query (%s) UVC control %u on unit %u: %d (exp. %u).\n",
- uvc_query_name(query), cs, unit, ret, size);
+ pr_err("Failed to query (%s) UVC control %u on unit %u: %d (exp. %u)\n",
+ uvc_query_name(query), cs, unit, ret, size);
if (ret != -EPIPE)
return ret;
@@ -254,9 +255,8 @@ static int uvc_get_video_ctrl(struct uvc_streaming *stream,
ret = -EIO;
goto out;
} else if (ret != size) {
- uvc_printk(KERN_ERR, "Failed to query (%u) UVC %s control : "
- "%d (exp. %u).\n", query, probe ? "probe" : "commit",
- ret, size);
+ pr_err("Failed to query (%u) UVC %s control : %d (exp. %u)\n",
+ query, probe ? "probe" : "commit", ret, size);
ret = -EIO;
goto out;
}
@@ -334,9 +334,8 @@ static int uvc_set_video_ctrl(struct uvc_streaming *stream,
probe ? UVC_VS_PROBE_CONTROL : UVC_VS_COMMIT_CONTROL, data,
size, uvc_timeout_param);
if (ret != size) {
- uvc_printk(KERN_ERR, "Failed to set UVC %s control : "
- "%d (exp. %u).\n", probe ? "probe" : "commit",
- ret, size);
+ pr_err("Failed to set UVC %s control : %d (exp. %u)\n",
+ probe ? "probe" : "commit", ret, size);
ret = -EIO;
}
@@ -1120,8 +1119,7 @@ static void uvc_video_copy_data_work(struct work_struct *work)
ret = usb_submit_urb(uvc_urb->urb, GFP_KERNEL);
if (ret < 0)
- uvc_printk(KERN_ERR, "Failed to resubmit video URB (%d).\n",
- ret);
+ pr_err("Failed to resubmit video URB (%d)\n", ret);
}
static void uvc_video_decode_data(struct uvc_urb *uvc_urb,
@@ -1507,8 +1505,8 @@ static void uvc_video_complete(struct urb *urb)
break;
default:
- uvc_printk(KERN_WARNING, "Non-zero status (%d) in video "
- "completion handler.\n", urb->status);
+ pr_warn("Non-zero status (%d) in video completion handler\n",
+ urb->status);
fallthrough;
case -ENOENT: /* usb_poison_urb() called. */
if (stream->frozen)
@@ -1545,9 +1543,7 @@ static void uvc_video_complete(struct urb *urb)
if (!uvc_urb->async_operations) {
ret = usb_submit_urb(uvc_urb->urb, GFP_ATOMIC);
if (ret < 0)
- uvc_printk(KERN_ERR,
- "Failed to resubmit video URB (%d).\n",
- ret);
+ pr_err("Failed to resubmit video URB (%d)\n", ret);
return;
}
@@ -1893,8 +1889,8 @@ static int uvc_video_start_transfer(struct uvc_streaming *stream,
for_each_uvc_urb(uvc_urb, stream) {
ret = usb_submit_urb(uvc_urb->urb, gfp_flags);
if (ret < 0) {
- uvc_printk(KERN_ERR, "Failed to submit URB %u (%d).\n",
- uvc_urb_index(uvc_urb), ret);
+ pr_err("Failed to submit URB %u (%d)\n",
+ uvc_urb_index(uvc_urb), ret);
uvc_video_stop_transfer(stream, 1);
return ret;
}
@@ -1989,7 +1985,7 @@ int uvc_video_init(struct uvc_streaming *stream)
int ret;
if (stream->nformats == 0) {
- uvc_printk(KERN_INFO, "No supported video formats found.\n");
+ pr_info("No supported video formats found\n");
return -EINVAL;
}
@@ -2029,8 +2025,7 @@ int uvc_video_init(struct uvc_streaming *stream)
}
if (format->nframes == 0) {
- uvc_printk(KERN_INFO, "No frame descriptor found for the "
- "default format.\n");
+ pr_info("No frame descriptor found for the default format\n");
return -EINVAL;
}
@@ -2064,8 +2059,7 @@ int uvc_video_init(struct uvc_streaming *stream)
if (stream->intf->num_altsetting == 1)
stream->decode = uvc_video_encode_bulk;
else {
- uvc_printk(KERN_INFO, "Isochronous endpoints are not "
- "supported for video output devices.\n");
+ pr_info("Isochronous endpoints are not supported for video output devices\n");
return -EINVAL;
}
}
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index a3dfacf069c4..724dec20444a 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -725,20 +725,17 @@ extern unsigned int uvc_trace_param;
extern unsigned int uvc_timeout_param;
extern unsigned int uvc_hw_timestamps_param;
-#define uvc_trace(flag, msg...) \
- do { \
- if (uvc_trace_param & flag) \
- printk(KERN_DEBUG "uvcvideo: " msg); \
- } while (0)
-
-#define uvc_warn_once(dev, warn, msg...) \
- do { \
- if (!test_and_set_bit(warn, &dev->warnings)) \
- printk(KERN_INFO "uvcvideo: " msg); \
- } while (0)
-
-#define uvc_printk(level, msg...) \
- printk(level "uvcvideo: " msg)
+#define uvc_trace(flag, fmt, ...) \
+do { \
+ if (uvc_trace_param & flag) \
+ printk(KERN_DEBUG "uvcvideo: " fmt, ##__VA_ARGS__); \
+} while (0)
+
+#define uvc_warn_once(dev, warn, fmt, ...) \
+do { \
+ if (!test_and_set_bit(warn, &(dev)->warnings)) \
+ pr_info(fmt, ##__VA_ARGS__); \
+} while (0)
/* --------------------------------------------------------------------------
* Internal functions.
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