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rc80211_pid: Fix fast_start parameter handling 

This removes the fast_start parameter from the rc_pid parameters
information and instead uses the parameter macro when initializing
the rc_pid state. Since the parameter is only used on initialization,
there is no point of making exporting it via debugfs. This also fixes
uninitialized memory references to the fast_start and norm_offset
parameters detected by the kmemcheck utility.  Thanks to Vegard Nossum
for reporting the bug.

Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Mattias Nissler 2008-07-07 23:08:19 +02:00 committed by John W. Linville
parent 32e8d4948b
commit adeed48090
2 changed files with 13 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
net/mac80211/rc80211_pid.h
View File

@ -141,7 +141,6 @@ struct rc_pid_events_file_info {
* rate behaviour values (lower means we should trust more what we learnt
* about behaviour of rates, higher means we should trust more the natural
* ordering of rates)
* @fast_start: if Y, push high rates right after initialization
*/
struct rc_pid_debugfs_entries {
struct dentry *dir;
@ -154,7 +153,6 @@ struct rc_pid_debugfs_entries {
struct dentry *sharpen_factor;
struct dentry *sharpen_duration;
struct dentry *norm_offset;
struct dentry *fast_start;
};
void rate_control_pid_event_tx_status(struct rc_pid_event_buffer *buf,
@ -267,9 +265,6 @@ struct rc_pid_info {
/* Normalization offset. */
unsigned int norm_offset;
/* Fast starst parameter. */
unsigned int fast_start;
/* Rates information. */
struct rc_pid_rateinfo *rinfo;

31
net/mac80211/rc80211_pid_algo.c
View File

@ -398,13 +398,25 @@ static void *rate_control_pid_alloc(struct ieee80211_local *local)
return NULL;
}
pinfo->target = RC_PID_TARGET_PF;
pinfo->sampling_period = RC_PID_INTERVAL;
pinfo->coeff_p = RC_PID_COEFF_P;
pinfo->coeff_i = RC_PID_COEFF_I;
pinfo->coeff_d = RC_PID_COEFF_D;
pinfo->smoothing_shift = RC_PID_SMOOTHING_SHIFT;
pinfo->sharpen_factor = RC_PID_SHARPENING_FACTOR;
pinfo->sharpen_duration = RC_PID_SHARPENING_DURATION;
pinfo->norm_offset = RC_PID_NORM_OFFSET;
pinfo->rinfo = rinfo;
pinfo->oldrate = 0;
/* Sort the rates. This is optimized for the most common case (i.e.
* almost-sorted CCK+OFDM rates). Kind of bubble-sort with reversed
* mapping too. */
for (i = 0; i < sband->n_bitrates; i++) {
rinfo[i].index = i;
rinfo[i].rev_index = i;
if (pinfo->fast_start)
if (RC_PID_FAST_START)
rinfo[i].diff = 0;
else
rinfo[i].diff = i * pinfo->norm_offset;
@ -425,19 +437,6 @@ static void *rate_control_pid_alloc(struct ieee80211_local *local)
break;
}
pinfo->target = RC_PID_TARGET_PF;
pinfo->sampling_period = RC_PID_INTERVAL;
pinfo->coeff_p = RC_PID_COEFF_P;
pinfo->coeff_i = RC_PID_COEFF_I;
pinfo->coeff_d = RC_PID_COEFF_D;
pinfo->smoothing_shift = RC_PID_SMOOTHING_SHIFT;
pinfo->sharpen_factor = RC_PID_SHARPENING_FACTOR;
pinfo->sharpen_duration = RC_PID_SHARPENING_DURATION;
pinfo->norm_offset = RC_PID_NORM_OFFSET;
pinfo->fast_start = RC_PID_FAST_START;
pinfo->rinfo = rinfo;
pinfo->oldrate = 0;
#ifdef CONFIG_MAC80211_DEBUGFS
de = &pinfo->dentries;
de->dir = debugfs_create_dir("rc80211_pid",
@ -465,9 +464,6 @@ static void *rate_control_pid_alloc(struct ieee80211_local *local)
de->norm_offset = debugfs_create_u32("norm_offset",
S_IRUSR | S_IWUSR, de->dir,
&pinfo->norm_offset);
de->fast_start = debugfs_create_bool("fast_start",
S_IRUSR | S_IWUSR, de->dir,
&pinfo->fast_start);
#endif
return pinfo;
@ -479,7 +475,6 @@ static void rate_control_pid_free(void *priv)
#ifdef CONFIG_MAC80211_DEBUGFS
struct rc_pid_debugfs_entries *de = &pinfo->dentries;
debugfs_remove(de->fast_start);
debugfs_remove(de->norm_offset);
debugfs_remove(de->sharpen_duration);
debugfs_remove(de->sharpen_factor);