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Re: [PATCH] rtlwifi: Change long delays to sleeps

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On Tue, Feb 16, 2016 at 3:42 AM, Larry Finger <Larry.Finger@xxxxxxxxxxxx> wrote:
> Routine rtl_addr_delay() uses delay statements in code that can
> sleep. To improve system responsiveness, the various delay statements
> are changed.
>
> In addition, routines rtl_rfreg_delay() and rtl_bb_delay() are
> rewritten to use the code in rtl_addr_delay() for most of their
> input values.
>
> Suggested-by: Byeoungwook Kim <quddnr145@xxxxxxxxx>
> Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
> ---
>
> Kalle,
>
> This patch will interfere with a set of 3 patches submitted by Byeoungwook Kim
> <quddnr145@xxxxxxxxx> on Feb. 3, 2016 that are currently in the deferred list
> at patchwork.
>
> Larry
>
>  drivers/net/wireless/realtek/rtlwifi/core.c | 44 ++++++++---------------------
>  1 file changed, 12 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/net/wireless/realtek/rtlwifi/core.c b/drivers/net/wireless/realtek/rtlwifi/core.c
> index 02eba0e..16ad0d6 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/core.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/core.c
> @@ -54,59 +54,39 @@ EXPORT_SYMBOL(channel5g_80m);
>  void rtl_addr_delay(u32 addr)
>  {
>         if (addr == 0xfe)
> -               mdelay(50);
> +               msleep(50);
>         else if (addr == 0xfd)
> -               mdelay(5);
> +               msleep(5);
>         else if (addr == 0xfc)
> -               mdelay(1);
> +               msleep(1);
>         else if (addr == 0xfb)
> -               udelay(50);
> +               usleep_range(50, 100);
>         else if (addr == 0xfa)
> -               udelay(5);
> +               usleep_range(5, 10);
>         else if (addr == 0xf9)
> -               udelay(1);
> +               usleep_range(1, 2);

         why udelay is replaced by usleep_range?
>  }
>  EXPORT_SYMBOL(rtl_addr_delay);
>
>  void rtl_rfreg_delay(struct ieee80211_hw *hw, enum radio_path rfpath, u32 addr,
>                      u32 mask, u32 data)
>  {
> -       if (addr == 0xfe) {
> -               mdelay(50);
> -       } else if (addr == 0xfd) {
> -               mdelay(5);
> -       } else if (addr == 0xfc) {
> -               mdelay(1);
> -       } else if (addr == 0xfb) {
> -               udelay(50);
> -       } else if (addr == 0xfa) {
> -               udelay(5);
> -       } else if (addr == 0xf9) {
> -               udelay(1);
> +       if (addr >= 0xf9 && addr <= 0xfe) {
> +               rtl_addr_delay(addr);
>         } else {
>                 rtl_set_rfreg(hw, rfpath, addr, mask, data);
> -               udelay(1);
> +               usleep_range(1, 2);
>         }
>  }
>  EXPORT_SYMBOL(rtl_rfreg_delay);
>
>  void rtl_bb_delay(struct ieee80211_hw *hw, u32 addr, u32 data)
>  {
> -       if (addr == 0xfe) {
> -               mdelay(50);
> -       } else if (addr == 0xfd) {
> -               mdelay(5);
> -       } else if (addr == 0xfc) {
> -               mdelay(1);
> -       } else if (addr == 0xfb) {
> -               udelay(50);
> -       } else if (addr == 0xfa) {
> -               udelay(5);
> -       } else if (addr == 0xf9) {
> -               udelay(1);
> +       if (addr >= 0xf9 && addr <= 0xfe) {
> +               rtl_addr_delay(addr);
>         } else {
>                 rtl_set_bbreg(hw, addr, MASKDWORD, data);
> -               udelay(1);
> +               usleep_range(1, 2);
>         }
>  }
>  EXPORT_SYMBOL(rtl_bb_delay);
> --
> 2.1.4
>
> --
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-Souptick
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