diff options
| author | Pratik Jain <pratik.jain0509@gmail.com> | 2018-03-21 15:20:43 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-22 18:29:50 +0100 |
| commit | 65197a7d361f01878ac23a2cc007c19095e5d8a6 (patch) | |
| tree | c74fd9205ded62f33306816dc85e3359cf9afe58 | |
| parent | f81746470b47d9815ecc7de5724242960a87bd2a (diff) | |
| download | linux-65197a7d361f01878ac23a2cc007c19095e5d8a6.tar.bz2 | |
Staging: xgifb: XGI_main_26.c: Refactored the function
Refactored the function `XGIfb_search_refresh_rate` by removing a level
of `if...else` block nesting. Removed unnecessary parantheses. Removed
potential bug of array underflow.
Signed-off-by: Pratik Jain <pratik.jain0509@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/xgifb/XGI_main_26.c | 59 |
1 files changed, 30 insertions, 29 deletions
diff --git a/drivers/staging/xgifb/XGI_main_26.c b/drivers/staging/xgifb/XGI_main_26.c index 10107de0119a..eca0b50f0df6 100644 --- a/drivers/staging/xgifb/XGI_main_26.c +++ b/drivers/staging/xgifb/XGI_main_26.c @@ -544,41 +544,42 @@ static u8 XGIfb_search_refresh_rate(struct xgifb_video_info *xgifb_info, yres = XGIbios_mode[xgifb_info->mode_idx].yres; xgifb_info->rate_idx = 0; - while ((XGIfb_vrate[i].idx != 0) && (XGIfb_vrate[i].xres <= xres)) { - if ((XGIfb_vrate[i].xres == xres) && - (XGIfb_vrate[i].yres == yres)) { - if (XGIfb_vrate[i].refresh == rate) { + + while (XGIfb_vrate[i].idx != 0 && XGIfb_vrate[i].xres <= xres) { + /* Skip values with xres or yres less than specified */ + if ((XGIfb_vrate[i].yres != yres) || + (XGIfb_vrate[i].xres != xres)) { + i++; + continue; + } + if (XGIfb_vrate[i].refresh == rate) { + xgifb_info->rate_idx = XGIfb_vrate[i].idx; + break; + } else if (XGIfb_vrate[i].refresh > rate) { + if (XGIfb_vrate[i].refresh - rate <= 3) { + pr_debug("Adjusting rate from %d up to %d\n", + rate, XGIfb_vrate[i].refresh); xgifb_info->rate_idx = XGIfb_vrate[i].idx; - break; - } else if (XGIfb_vrate[i].refresh > rate) { - if ((XGIfb_vrate[i].refresh - rate) <= 3) { - pr_debug("Adjusting rate from %d up to %d\n", - rate, XGIfb_vrate[i].refresh); - xgifb_info->rate_idx = - XGIfb_vrate[i].idx; - xgifb_info->refresh_rate = - XGIfb_vrate[i].refresh; - } else if (((rate - XGIfb_vrate[i - 1].refresh) - <= 2) && (XGIfb_vrate[i].idx - != 1)) { - pr_debug("Adjusting rate from %d down to %d\n", - rate, - XGIfb_vrate[i - 1].refresh); - xgifb_info->rate_idx = - XGIfb_vrate[i - 1].idx; - xgifb_info->refresh_rate = - XGIfb_vrate[i - 1].refresh; - } - break; - } else if ((rate - XGIfb_vrate[i].refresh) <= 2) { + xgifb_info->refresh_rate = + XGIfb_vrate[i].refresh; + } else if ((XGIfb_vrate[i].idx != 1) && + (rate - XGIfb_vrate[i - 1].refresh <= 2)) { pr_debug("Adjusting rate from %d down to %d\n", - rate, XGIfb_vrate[i].refresh); - xgifb_info->rate_idx = XGIfb_vrate[i].idx; - break; + rate, XGIfb_vrate[i - 1].refresh); + xgifb_info->rate_idx = XGIfb_vrate[i - 1].idx; + xgifb_info->refresh_rate = + XGIfb_vrate[i - 1].refresh; } + break; + } else if (rate - XGIfb_vrate[i].refresh <= 2) { + pr_debug("Adjusting rate from %d down to %d\n", + rate, XGIfb_vrate[i].refresh); + xgifb_info->rate_idx = XGIfb_vrate[i].idx; + break; } i++; } + if (xgifb_info->rate_idx > 0) return xgifb_info->rate_idx; pr_info("Unsupported rate %d for %dx%d\n", |