From f754b5ca0ac40dc7f805d6fe7de911ccf1d0f0e2 Mon Sep 17 00:00:00 2001 From: Eyal Shapira Date: Mon, 24 Feb 2014 10:24:34 +0200 Subject: [PATCH] iwlwifi: mvm: cleanups in iwl_dbgfs_frame_stats_read Switch pos to char * which makes the code a bit shorter as well as other minor cleanups suggested by Joe Perches. Signed-off-by: Eyal Shapira Reviewed-by: Johannes Berg Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/mvm/debugfs.c | 34 +++++++++++++++++------------- 1 file changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/iwlwifi/mvm/debugfs.c index 41c6370..e3b42b4 100644 --- a/drivers/net/wireless/iwlwifi/mvm/debugfs.c +++ b/drivers/net/wireless/iwlwifi/mvm/debugfs.c @@ -536,56 +536,60 @@ static ssize_t iwl_dbgfs_frame_stats_read(struct iwl_mvm *mvm, loff_t *ppos, struct iwl_mvm_frame_stats *stats) { - char *buff; - int pos = 0, idx, i; + char *buff, *pos, *endpos; + int idx, i; int ret; - size_t bufsz = 1024; + static const size_t bufsz = 1024; buff = kmalloc(bufsz, GFP_KERNEL); if (!buff) return -ENOMEM; spin_lock_bh(&mvm->drv_stats_lock); - pos += scnprintf(buff + pos, bufsz - pos, + + pos = buff; + endpos = pos + bufsz; + + pos += scnprintf(pos, endpos - pos, "Legacy/HT/VHT\t:\t%d/%d/%d\n", stats->legacy_frames, stats->ht_frames, stats->vht_frames); - pos += scnprintf(buff + pos, bufsz - pos, "20/40/80\t:\t%d/%d/%d\n", + pos += scnprintf(pos, endpos - pos, "20/40/80\t:\t%d/%d/%d\n", stats->bw_20_frames, stats->bw_40_frames, stats->bw_80_frames); - pos += scnprintf(buff + pos, bufsz - pos, "NGI/SGI\t\t:\t%d/%d\n", + pos += scnprintf(pos, endpos - pos, "NGI/SGI\t\t:\t%d/%d\n", stats->ngi_frames, stats->sgi_frames); - pos += scnprintf(buff + pos, bufsz - pos, "SISO/MIMO2\t:\t%d/%d\n", + pos += scnprintf(pos, endpos - pos, "SISO/MIMO2\t:\t%d/%d\n", stats->siso_frames, stats->mimo2_frames); - pos += scnprintf(buff + pos, bufsz - pos, "FAIL/SCSS\t:\t%d/%d\n", + pos += scnprintf(pos, endpos - pos, "FAIL/SCSS\t:\t%d/%d\n", stats->fail_frames, stats->success_frames); - pos += scnprintf(buff + pos, bufsz - pos, "MPDUs agg\t:\t%d\n", + pos += scnprintf(pos, endpos - pos, "MPDUs agg\t:\t%d\n", stats->agg_frames); - pos += scnprintf(buff + pos, bufsz - pos, "A-MPDUs\t\t:\t%d\n", + pos += scnprintf(pos, endpos - pos, "A-MPDUs\t\t:\t%d\n", stats->ampdu_count); - pos += scnprintf(buff + pos, bufsz - pos, "Avg MPDUs/A-MPDU:\t%d\n", + pos += scnprintf(pos, endpos - pos, "Avg MPDUs/A-MPDU:\t%d\n", stats->ampdu_count > 0 ? (stats->agg_frames / stats->ampdu_count) : 0); - pos += scnprintf(buff + pos, bufsz - pos, "Last Rates\n"); + pos += scnprintf(pos, endpos - pos, "Last Rates\n"); idx = stats->last_frame_idx - 1; for (i = 0; i < ARRAY_SIZE(stats->last_rates); i++) { idx = (idx + 1) % ARRAY_SIZE(stats->last_rates); if (stats->last_rates[idx] == 0) continue; - pos += scnprintf(buff + pos, bufsz - pos, "Rate[%d]: ", + pos += scnprintf(pos, endpos - pos, "Rate[%d]: ", (int)(ARRAY_SIZE(stats->last_rates) - i)); - pos += rs_pretty_print_rate(buff + pos, stats->last_rates[idx]); + pos += rs_pretty_print_rate(pos, stats->last_rates[idx]); } spin_unlock_bh(&mvm->drv_stats_lock); - ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos); + ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff); kfree(buff); return ret; -- 2.7.4