Re: [PATCH v2 06/28] video: fbdev: aty: Fix set but not used warnings in mach64_ct

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Am 28.11.20 um 23:40 schrieb Sam Ravnborg:
Fix W=1 warnings about variables assigned but never used.
- One variable is only used when CONFIG_FB_ATY_GENERIC_LCD is defined
   Fix so variable is only defined with CONFIG_FB_ATY_GENERIC_LCD
- Several variables was only assigned by a call to aty_ld_le32().
   Drop the variables but keep the call to aty_ld_le32() as it may
   have unexpected side-effects.

v2:
   - Updated subject (Lee)

Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Lee Jones <lee.jones@xxxxxxxxxx>

Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>

---
  drivers/video/fbdev/aty/mach64_ct.c | 15 +++++++++------
  1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/video/fbdev/aty/mach64_ct.c b/drivers/video/fbdev/aty/mach64_ct.c
index f87cc81f4fa2..011b07e44e0d 100644
--- a/drivers/video/fbdev/aty/mach64_ct.c
+++ b/drivers/video/fbdev/aty/mach64_ct.c
@@ -281,10 +281,13 @@ static u32 aty_pll_to_var_ct(const struct fb_info *info, const union aty_pll *pl
  void aty_set_pll_ct(const struct fb_info *info, const union aty_pll *pll)
  {
  	struct atyfb_par *par = (struct atyfb_par *) info->par;
-	u32 crtc_gen_cntl, lcd_gen_cntrl;
+	u32 crtc_gen_cntl;
  	u8 tmp, tmp2;
- lcd_gen_cntrl = 0;
+#ifdef CONFIG_FB_ATY_GENERIC_LCD
+	u32 lcd_gen_cntrl = 0;
+#endif
+
  #ifdef DEBUG
  	printk("atyfb(%s): about to program:\n"
  		"pll_ext_cntl=0x%02x pll_gen_cntl=0x%02x pll_vclk_cntl=0x%02x\n",
@@ -402,7 +405,7 @@ static int aty_init_pll_ct(const struct fb_info *info, union aty_pll *pll)
  	struct atyfb_par *par = (struct atyfb_par *) info->par;
  	u8 mpost_div, xpost_div, sclk_post_div_real;
  	u32 q, memcntl, trp;
-	u32 dsp_config, dsp_on_off, vga_dsp_config, vga_dsp_on_off;
+	u32 dsp_config;
  #ifdef DEBUG
  	int pllmclk, pllsclk;
  #endif
@@ -488,9 +491,9 @@ static int aty_init_pll_ct(const struct fb_info *info, union aty_pll *pll)
/* Allow BIOS to override */
  	dsp_config = aty_ld_le32(DSP_CONFIG, par);
-	dsp_on_off = aty_ld_le32(DSP_ON_OFF, par);
-	vga_dsp_config = aty_ld_le32(VGA_DSP_CONFIG, par);
-	vga_dsp_on_off = aty_ld_le32(VGA_DSP_ON_OFF, par);
+	aty_ld_le32(DSP_ON_OFF, par);
+	aty_ld_le32(VGA_DSP_CONFIG, par);
+	aty_ld_le32(VGA_DSP_ON_OFF, par);
if (dsp_config)
  		pll->ct.dsp_loop_latency = (dsp_config & DSP_LOOP_LATENCY) >> 16;


--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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