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Message-ID: <1287423539.20968.115.camel@Joe-Laptop>
Date: Mon, 18 Oct 2010 10:38:59 -0700
From: Joe Perches <joe@...ches.com>
To: Julia Lawall <julia@...u.dk>
Cc: walter harms <wharms@....de>, devel@...verdev.osuosl.org,
gregkh@...e.de, kernel-janitors@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] drivers/staging/cx25821: Use kstrdup
Perhaps it's more readable code to recheck the
field name flag and introduce a temporary
char *fname so the slightly unusual reuse of
field = kstrdup(field, GFP)
becomes
field = kstrdup(fname, GFP)
---
drivers/staging/cx25821/cx25821-audio-upstream.c | 34 +++---------
.../staging/cx25821/cx25821-video-upstream-ch2.c | 55 +++++++-------------
drivers/staging/cx25821/cx25821-video-upstream.c | 53 +++++++------------
3 files changed, 47 insertions(+), 95 deletions(-)
diff --git a/drivers/staging/cx25821/cx25821-audio-upstream.c b/drivers/staging/cx25821/cx25821-audio-upstream.c
index 27087db..180840f 100644
--- a/drivers/staging/cx25821/cx25821-audio-upstream.c
+++ b/drivers/staging/cx25821/cx25821-audio-upstream.c
@@ -723,8 +723,6 @@ int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
{
struct sram_channel *sram_ch;
int retval = 0;
- int err = 0;
- int str_length = 0;
if (dev->_audio_is_running) {
printk(KERN_WARNING "Audio Channel is still running so return!\n");
@@ -752,28 +750,14 @@ int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
_line_size = AUDIO_LINE_SIZE;
- if (dev->input_audiofilename) {
- str_length = strlen(dev->input_audiofilename);
- dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
-
- if (!dev->_audiofilename)
- goto error;
-
- memcpy(dev->_audiofilename, dev->input_audiofilename,
- str_length + 1);
-
- /* Default if filename is empty string */
- if (strcmp(dev->input_audiofilename, "") == 0)
- dev->_audiofilename = "/root/audioGOOD.wav";
-
- } else {
- str_length = strlen(_defaultAudioName);
- dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
-
- if (!dev->_audiofilename)
- goto error;
-
- memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1);
+ if (!dev->input_audiofilename || *dev->input_audiofilename == 0)
+ dev->_audiofilename = _defaultAudioName;
+ else
+ dev->_audiofilename = dev->input_audiofilename;
+ dev->_audiofilename = kstrdup(dev->_audiofilename, GFP_KERNEL);
+ if (!dev->_audiofilename) {
+ retval = -ENOMEM;
+ goto error;
}
retval =
@@ -802,5 +786,5 @@ int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
error:
cx25821_dev_unregister(dev);
- return err;
+ return retval;
}
diff --git a/drivers/staging/cx25821/cx25821-video-upstream-ch2.c b/drivers/staging/cx25821/cx25821-video-upstream-ch2.c
index d12dbb5..fa7cd70 100644
--- a/drivers/staging/cx25821/cx25821-video-upstream-ch2.c
+++ b/drivers/staging/cx25821/cx25821-video-upstream-ch2.c
@@ -747,10 +747,9 @@ int cx25821_vidupstream_init_ch2(struct cx25821_dev *dev, int channel_select,
struct sram_channel *sram_ch;
u32 tmp;
int retval = 0;
- int err = 0;
int data_frame_size = 0;
int risc_buffer_size = 0;
- int str_length = 0;
+ char *fname;
if (dev->_is_running_ch2) {
printk("Video Channel is still running so return!\n");
@@ -788,39 +787,23 @@ int cx25821_vidupstream_init_ch2(struct cx25821_dev *dev, int channel_select,
risc_buffer_size =
dev->_isNTSC_ch2 ? NTSC_RISC_BUF_SIZE : PAL_RISC_BUF_SIZE;
- if (dev->input_filename_ch2) {
- str_length = strlen(dev->input_filename_ch2);
- dev->_filename_ch2 = kmalloc(str_length + 1, GFP_KERNEL);
-
- if (!dev->_filename_ch2)
- goto error;
-
- memcpy(dev->_filename_ch2, dev->input_filename_ch2,
- str_length + 1);
- } else {
- str_length = strlen(dev->_defaultname_ch2);
- dev->_filename_ch2 = kmalloc(str_length + 1, GFP_KERNEL);
-
- if (!dev->_filename_ch2)
- goto error;
-
- memcpy(dev->_filename_ch2, dev->_defaultname_ch2,
- str_length + 1);
- }
-
- /* Default if filename is empty string */
- if (strcmp(dev->input_filename_ch2, "") == 0) {
- if (dev->_isNTSC_ch2) {
- dev->_filename_ch2 =
- (dev->_pixel_format_ch2 ==
- PIXEL_FRMT_411) ? "/root/vid411.yuv" :
- "/root/vidtest.yuv";
- } else {
- dev->_filename_ch2 =
- (dev->_pixel_format_ch2 ==
- PIXEL_FRMT_411) ? "/root/pal411.yuv" :
- "/root/pal422.yuv";
- }
+ if (dev->input_filename_ch2 && *dev->input_filename_ch2)
+ fname = dev->input_filename_ch2;
+ else if (dev->input_filename_ch2) {
+ /* Default if filename is empty string */
+ if (dev->_isNTSC_ch2)
+ fname = (dev->_pixel_format_ch2 == PIXEL_FRMT_411) ?
+ "/root/vid411.yuv" : "/root/vidtest.yuv";
+ else
+ fname = (dev->_pixel_format_ch2 == PIXEL_FRMT_411) ?
+ "/root/pal411.yuv" : "/root/pal422.yuv";
+ } else
+ fname = dev->_defaultname_ch2;
+
+ dev->_filename_ch2 = kstrdup(fname, GFP_KERNEL);
+ if (!dev->_filename_ch2) {
+ retval = -ENOMEM;
+ goto error;
}
retval =
@@ -851,5 +834,5 @@ int cx25821_vidupstream_init_ch2(struct cx25821_dev *dev, int channel_select,
error:
cx25821_dev_unregister(dev);
- return err;
+ return retval;
}
diff --git a/drivers/staging/cx25821/cx25821-video-upstream.c b/drivers/staging/cx25821/cx25821-video-upstream.c
index 756a820..d51c6c1 100644
--- a/drivers/staging/cx25821/cx25821-video-upstream.c
+++ b/drivers/staging/cx25821/cx25821-video-upstream.c
@@ -800,10 +800,9 @@ int cx25821_vidupstream_init_ch1(struct cx25821_dev *dev, int channel_select,
struct sram_channel *sram_ch;
u32 tmp;
int retval = 0;
- int err = 0;
int data_frame_size = 0;
int risc_buffer_size = 0;
- int str_length = 0;
+ char *fname;
if (dev->_is_running) {
printk(KERN_INFO "Video Channel is still running so return!\n");
@@ -840,37 +839,23 @@ int cx25821_vidupstream_init_ch1(struct cx25821_dev *dev, int channel_select,
risc_buffer_size =
dev->_isNTSC ? NTSC_RISC_BUF_SIZE : PAL_RISC_BUF_SIZE;
- if (dev->input_filename) {
- str_length = strlen(dev->input_filename);
- dev->_filename = kmalloc(str_length + 1, GFP_KERNEL);
-
- if (!dev->_filename)
- goto error;
-
- memcpy(dev->_filename, dev->input_filename, str_length + 1);
- } else {
- str_length = strlen(dev->_defaultname);
- dev->_filename = kmalloc(str_length + 1, GFP_KERNEL);
-
- if (!dev->_filename)
- goto error;
-
- memcpy(dev->_filename, dev->_defaultname, str_length + 1);
- }
-
- /* Default if filename is empty string */
- if (strcmp(dev->input_filename, "") == 0) {
- if (dev->_isNTSC) {
- dev->_filename =
- (dev->_pixel_format ==
- PIXEL_FRMT_411) ? "/root/vid411.yuv" :
- "/root/vidtest.yuv";
- } else {
- dev->_filename =
- (dev->_pixel_format ==
- PIXEL_FRMT_411) ? "/root/pal411.yuv" :
- "/root/pal422.yuv";
- }
+ if (dev->input_filename && *dev->input_filename)
+ fname = dev->input_filename;
+ else if (dev->input_filename) {
+ /* Default if filename is empty string */
+ if (dev->_isNTSC)
+ fname = (dev->_pixel_format == PIXEL_FRMT_411) ?
+ "/root/vid411.yuv" : "/root/vidtest.yuv";
+ else
+ fname = (dev->_pixel_format == PIXEL_FRMT_411) ?
+ "/root/pal411.yuv" : "/root/pal422.yuv";
+ } else
+ fname = dev->_defaultname;
+
+ dev->_filename = kstrdup(fname, GFP_KERNEL);
+ if (!dev->_filename) {
+ retval = -ENOMEM;
+ goto error;
}
dev->_is_running = 0;
@@ -908,5 +893,5 @@ int cx25821_vidupstream_init_ch1(struct cx25821_dev *dev, int channel_select,
error:
cx25821_dev_unregister(dev);
- return err;
+ return retval;
}
--
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