From 9380e112f7b9ab83b57062f2164476e76c5533c7 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 4 Sep 2014 10:04:38 -0300 Subject: [PATCH] [media] hdpvr: reduce memory footprint when debugging There is no need to use hex_dump_to_buffer() since we have a kernel helper to dump up to 64 bytes just via printk(). Signed-off-by: Andy Shevchenko Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/hdpvr/hdpvr-control.c | 21 ++++++------------- drivers/media/usb/hdpvr/hdpvr-core.c | 27 ++++++------------------- 2 files changed, 12 insertions(+), 36 deletions(-) diff --git a/drivers/media/usb/hdpvr/hdpvr-control.c b/drivers/media/usb/hdpvr/hdpvr-control.c index 6053661dc04..6e86032ea5d 100644 --- a/drivers/media/usb/hdpvr/hdpvr-control.c +++ b/drivers/media/usb/hdpvr/hdpvr-control.c @@ -59,13 +59,10 @@ int get_video_info(struct hdpvr_device *dev, struct hdpvr_video_info *vidinf) 1000); #ifdef HDPVR_DEBUG - if (hdpvr_debug & MSG_INFO) { - char print_buf[15]; - hex_dump_to_buffer(dev->usbc_buf, 5, 16, 1, print_buf, - sizeof(print_buf), 0); + if (hdpvr_debug & MSG_INFO) v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, - "get video info returned: %d, %s\n", ret, print_buf); - } + "get video info returned: %d, %5ph\n", ret, + dev->usbc_buf); #endif mutex_unlock(&dev->usbc_mutex); @@ -82,9 +79,6 @@ int get_video_info(struct hdpvr_device *dev, struct hdpvr_video_info *vidinf) int get_input_lines_info(struct hdpvr_device *dev) { -#ifdef HDPVR_DEBUG - char print_buf[9]; -#endif int ret, lines; mutex_lock(&dev->usbc_mutex); @@ -96,13 +90,10 @@ int get_input_lines_info(struct hdpvr_device *dev) 1000); #ifdef HDPVR_DEBUG - if (hdpvr_debug & MSG_INFO) { - hex_dump_to_buffer(dev->usbc_buf, 3, 16, 1, print_buf, - sizeof(print_buf), 0); + if (hdpvr_debug & MSG_INFO) v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, - "get input lines info returned: %d, %s\n", ret, - print_buf); - } + "get input lines info returned: %d, %3ph\n", ret, + dev->usbc_buf); #else (void)ret; /* suppress compiler warning */ #endif diff --git a/drivers/media/usb/hdpvr/hdpvr-core.c b/drivers/media/usb/hdpvr/hdpvr-core.c index c5638964c3f..42b4cdf28cf 100644 --- a/drivers/media/usb/hdpvr/hdpvr-core.c +++ b/drivers/media/usb/hdpvr/hdpvr-core.c @@ -124,14 +124,6 @@ static int device_authorization(struct hdpvr_device *dev) int ret, retval = -ENOMEM; char request_type = 0x38, rcv_request = 0x81; char *response; -#ifdef HDPVR_DEBUG - size_t buf_size = 46; - char *print_buf = kzalloc(5*buf_size+1, GFP_KERNEL); - if (!print_buf) { - v4l2_err(&dev->v4l2_dev, "Out of memory\n"); - return retval; - } -#endif mutex_lock(&dev->usbc_mutex); ret = usb_control_msg(dev->udev, @@ -147,11 +139,9 @@ static int device_authorization(struct hdpvr_device *dev) } #ifdef HDPVR_DEBUG else { - hex_dump_to_buffer(dev->usbc_buf, 46, 16, 1, print_buf, - 5*buf_size+1, 0); v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, - "Status request returned, len %d: %s\n", - ret, print_buf); + "Status request returned, len %d: %46ph\n", + ret, dev->usbc_buf); } #endif @@ -189,15 +179,13 @@ static int device_authorization(struct hdpvr_device *dev) response = dev->usbc_buf+38; #ifdef HDPVR_DEBUG - hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0); - v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %s\n", - print_buf); + v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %8ph\n", + response); #endif challenge(response); #ifdef HDPVR_DEBUG - hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0); - v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %s\n", - print_buf); + v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %8ph\n", + response); #endif msleep(100); @@ -213,9 +201,6 @@ static int device_authorization(struct hdpvr_device *dev) retval = ret != 8; unlock: mutex_unlock(&dev->usbc_mutex); -#ifdef HDPVR_DEBUG - kfree(print_buf); -#endif return retval; } -- 2.46.0