fbdev: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-throughSigned-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200707210539.GA12530@embeddedor

drivers/video/fbdev/acornfb.c

@@ -857,7 +857,7 @@ static void acornfb_parse_dram(char *opt)
 		case 'M':
 		case 'm':
 			size *= 1024;
-			/* Fall through */
+			fallthrough;
 		case 'K':
 		case 'k':
 			size *= 1024;

drivers/video/fbdev/arcfb.c

@@ -419,7 +419,7 @@ static int arcfb_ioctl(struct fb_info *info,
 			schedule();
 			finish_wait(&arcfb_waitq, &wait);
 		}
-		/* fall through */
+		fallthrough;
 
 		case FBIO_GETCONTROL2:
 		{

drivers/video/fbdev/atmel_lcdfb.c

@@ -508,7 +508,7 @@ static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
 	case 32:
 		var->transp.offset = 24;
 		var->transp.length = 8;
-		/* fall through */
+		fallthrough;
 	case 24:
 		if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
 			/* RGB:888 mode */
@@ -633,7 +633,7 @@ static int atmel_lcdfb_set_par(struct fb_info *info)
 		case 2: value |= ATMEL_LCDC_PIXELSIZE_2; break;
 		case 4: value |= ATMEL_LCDC_PIXELSIZE_4; break;
 		case 8: value |= ATMEL_LCDC_PIXELSIZE_8; break;
-		case 15: /* fall through */
+		case 15: fallthrough;
 		case 16: value |= ATMEL_LCDC_PIXELSIZE_16; break;
 		case 24: value |= ATMEL_LCDC_PIXELSIZE_24; break;
 		case 32: value |= ATMEL_LCDC_PIXELSIZE_32; break;

drivers/video/fbdev/aty/radeon_pm.c

@@ -1208,11 +1208,11 @@ static void radeon_pm_enable_dll_m10(struct radeonfb_info *rinfo)
 	case 1:
 		if (mc & 0x4)
 			break;
-		/* fall through */
+		fallthrough;
 	case 2:
 		dll_sleep_mask |= MDLL_R300_RDCK__MRDCKB_SLEEP;
 		dll_reset_mask |= MDLL_R300_RDCK__MRDCKB_RESET;
-		/* fall through */
+		fallthrough;
 	case 0:
 		dll_sleep_mask |= MDLL_R300_RDCK__MRDCKA_SLEEP;
 		dll_reset_mask |= MDLL_R300_RDCK__MRDCKA_RESET;
@@ -1221,7 +1221,7 @@ static void radeon_pm_enable_dll_m10(struct radeonfb_info *rinfo)
 	case 1:
 		if (!(mc & 0x4))
 			break;
-		/* fall through */
+		fallthrough;
 	case 2:
 		dll_sleep_mask |= MDLL_R300_RDCK__MRDCKD_SLEEP;
 		dll_reset_mask |= MDLL_R300_RDCK__MRDCKD_RESET;

drivers/video/fbdev/cirrusfb.c

@@ -1476,11 +1476,11 @@ static void init_vgachip(struct fb_info *info)
 		mdelay(100);
 		/* mode */
 		vga_wgfx(cinfo->regbase, CL_GR31, 0x00);
-		/* fall through */
+		fallthrough;
 	case BT_GD5480:
 		/* from Klaus' NetBSD driver: */
 		vga_wgfx(cinfo->regbase, CL_GR2F, 0x00);
-		/* fall through */
+		fallthrough;
 	case BT_ALPINE:
 		/* put blitter into 542x compat */
 		vga_wgfx(cinfo->regbase, CL_GR33, 0x00);

drivers/video/fbdev/controlfb.c

@@ -713,7 +713,7 @@ static int controlfb_blank(int blank_mode, struct fb_info *info)
 			break;
 		case FB_BLANK_POWERDOWN:
 			ctrl &= ~0x33;
-			/* fall through */
+			fallthrough;
 		case FB_BLANK_NORMAL:
 			ctrl |= 0x400;
 			break;

drivers/video/fbdev/core/fbmem.c

@@ -1310,7 +1310,7 @@ static long fb_compat_ioctl(struct file *file, unsigned int cmd,
 	case FBIOGET_CON2FBMAP:
 	case FBIOPUT_CON2FBMAP:
 		arg = (unsigned long) compat_ptr(arg);
-		/* fall through */
+		fallthrough;
 	case FBIOBLANK:
 		ret = do_fb_ioctl(info, cmd, arg);
 		break;

drivers/video/fbdev/fsl-diu-fb.c

@@ -1287,7 +1287,7 @@ static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
 		dev_warn(info->dev,
 			 "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
 			 MFB_SET_PIXFMT_OLD);
-		/* fall through */
+		fallthrough;
 	case MFB_SET_PIXFMT:
 		if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
 			return -EFAULT;
@@ -1297,7 +1297,7 @@ static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
 		dev_warn(info->dev,
 			 "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
 			 MFB_GET_PIXFMT_OLD);
-		/* fall through */
+		fallthrough;
 	case MFB_GET_PIXFMT:
 		pix_fmt = ad->pix_fmt;
 		if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))

drivers/video/fbdev/gxt4500.c

@@ -534,7 +534,7 @@ static int gxt4500_setcolreg(unsigned int reg, unsigned int red,
 			break;
 		case DFA_PIX_32BIT:
 			val |= (reg << 24);
-			/* fall through */
+			fallthrough;
 		case DFA_PIX_24BIT:
 			val |= (reg << 16) | (reg << 8);
 			break;

drivers/video/fbdev/i740fb.c

@@ -430,7 +430,7 @@ static int i740fb_decode_var(const struct fb_var_screeninfo *var,
 		break;
 	case 9 ... 15:
 		bpp = 15;
-		/* fall through */
+		fallthrough;
 	case 16:
 		if ((1000000 / var->pixclock) > DACSPEED16) {
 			dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 15/16bpp)\n",

drivers/video/fbdev/offb.c

@@ -141,7 +141,7 @@ static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 		/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 		out_le32(par->cmap_adr + 0x58,
 			 in_le32(par->cmap_adr + 0x58) & ~0x20);
-		/* fall through */
+		fallthrough;
 	case cmap_r128:
 		/* Set palette index & data */
 		out_8(par->cmap_adr + 0xb0, regno);
@@ -211,7 +211,7 @@ static int offb_blank(int blank, struct fb_info *info)
 				/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 				out_le32(par->cmap_adr + 0x58,
 					 in_le32(par->cmap_adr + 0x58) & ~0x20);
-				/* fall through */
+				fallthrough;
 			case cmap_r128:
 				/* Set palette index & data */
 				out_8(par->cmap_adr + 0xb0, i);

drivers/video/fbdev/omap/lcdc.c

@@ -328,13 +328,13 @@ static int omap_lcdc_setup_plane(int plane, int channel_out,
 			lcdc.bpp = 12;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case OMAPFB_COLOR_YUV422:
 		if (lcdc.ext_mode) {
 			lcdc.bpp = 16;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	default:
 		/* FIXME: other BPPs.
 		 * bpp1: code  0,     size 256

drivers/video/fbdev/omap/omapfb_main.c

@@ -253,7 +253,7 @@ static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
 		if (fbdev->ctrl->setcolreg)
 			r = fbdev->ctrl->setcolreg(regno, red, green, blue,
 							transp, update_hw_pal);
-		/* Fallthrough */
+		fallthrough;
 	case OMAPFB_COLOR_RGB565:
 	case OMAPFB_COLOR_RGB444:
 		if (r != 0)
@@ -443,7 +443,7 @@ static int set_color_mode(struct omapfb_plane_struct *plane,
 		return 0;
 	case 12:
 		var->bits_per_pixel = 16;
-		/* fall through */
+		fallthrough;
 	case 16:
 		if (plane->fbdev->panel->bpp == 12)
 			plane->color_mode = OMAPFB_COLOR_RGB444;
@@ -1531,27 +1531,27 @@ static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
 	case OMAPFB_ACTIVE:
 		for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
 			unregister_framebuffer(fbdev->fb_info[i]);
-		/* fall through */
+		fallthrough;
 	case 7:
 		omapfb_unregister_sysfs(fbdev);
-		/* fall through */
+		fallthrough;
 	case 6:
 		if (fbdev->panel->disable)
 			fbdev->panel->disable(fbdev->panel);
-		/* fall through */
+		fallthrough;
 	case 5:
 		omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
-		/* fall through */
+		fallthrough;
 	case 4:
 		planes_cleanup(fbdev);
-		/* fall through */
+		fallthrough;
 	case 3:
 		ctrl_cleanup(fbdev);
-		/* fall through */
+		fallthrough;
 	case 2:
 		if (fbdev->panel->cleanup)
 			fbdev->panel->cleanup(fbdev->panel);
-		/* fall through */
+		fallthrough;
 	case 1:
 		dev_set_drvdata(fbdev->dev, NULL);
 		kfree(fbdev);
@@ -1854,7 +1854,7 @@ static int __init omapfb_setup(char *options)
 			case 'm':
 			case 'M':
 				vram *= 1024;
-				/* Fall through */
+				fallthrough;
 			case 'k':
 			case 'K':
 				vram *= 1024;

drivers/video/fbdev/omap2/omapfb/dss/dispc.c

@@ -1861,7 +1861,7 @@ static void calc_vrfb_rotation_offset(u8 rotation, bool mirror,
 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
 			color_mode == OMAP_DSS_COLOR_UYVY)
 			width = width >> 1;
-		/* fall through */
+		fallthrough;
 	case OMAP_DSS_ROT_90:
 	case OMAP_DSS_ROT_270:
 		*offset1 = 0;
@@ -1884,7 +1884,7 @@ static void calc_vrfb_rotation_offset(u8 rotation, bool mirror,
 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
 			color_mode == OMAP_DSS_COLOR_UYVY)
 			width = width >> 1;
-		/* fall through */
+		fallthrough;
 	case OMAP_DSS_ROT_90 + 4:
 	case OMAP_DSS_ROT_270 + 4:
 		*offset1 = 0;

drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c

@@ -760,7 +760,7 @@ int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg)
 			r = -ENODEV;
 			break;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 
 	case OMAPFB_WAITFORVSYNC:
 		DBG("ioctl WAITFORVSYNC\n");

drivers/video/fbdev/omap2/omapfb/omapfb-main.c

@@ -882,7 +882,7 @@ int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
 				/ (var->bits_per_pixel >> 2);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		screen_width = fix->line_length / (var->bits_per_pixel >> 3);
 		break;

drivers/video/fbdev/pm2fb.c

@@ -233,10 +233,10 @@ static u32 to3264(u32 timing, int bpp, int is64)
 	switch (bpp) {
 	case 24:
 		timing *= 3;
-		/* fall through */
+		fallthrough;
 	case 8:
 		timing >>= 1;
-		/* fall through */
+		fallthrough;
 	case 16:
 		timing >>= 1;
 	case 32:

drivers/video/fbdev/pxafb.c

@@ -1614,7 +1614,7 @@ static void set_ctrlr_state(struct pxafb_info *fbi, u_int state)
 		 */
 		if (old_state != C_DISABLE_PM)
 			break;
-		/* fall through */
+		fallthrough;
 
 	case C_ENABLE:
 		/*

drivers/video/fbdev/s3c-fb.c

@@ -284,7 +284,7 @@ static int s3c_fb_check_var(struct fb_var_screeninfo *var,
 		/* 666 with one bit alpha/transparency */
 		var->transp.offset	= 18;
 		var->transp.length	= 1;
-		/* fall through */
+		fallthrough;
 	case 18:
 		var->bits_per_pixel	= 32;
 
@@ -312,7 +312,7 @@ static int s3c_fb_check_var(struct fb_var_screeninfo *var,
 	case 25:
 		var->transp.length	= var->bits_per_pixel - 24;
 		var->transp.offset	= 24;
-		/* fall through */
+		fallthrough;
 	case 24:
 		/* our 24bpp is unpacked, so 32bpp */
 		var->bits_per_pixel	= 32;
@@ -809,7 +809,7 @@ static int s3c_fb_blank(int blank_mode, struct fb_info *info)
 	case FB_BLANK_POWERDOWN:
 		wincon &= ~WINCONx_ENWIN;
 		sfb->enabled &= ~(1 << index);
-		/* fall through - to FB_BLANK_NORMAL */
+		fallthrough;	/* to FB_BLANK_NORMAL */
 
 	case FB_BLANK_NORMAL:
 		/* disable the DMA and display 0x0 (black) */

drivers/video/fbdev/sa1100fb.c

@@ -935,7 +935,7 @@ static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
 		 */
 		if (old_state != C_DISABLE_PM)
 			break;
-		/* fall through */
+		fallthrough;
 
 	case C_ENABLE:
 		/*

drivers/video/fbdev/savage/savagefb_driver.c

@@ -1859,8 +1859,7 @@ static int savage_init_hw(struct savagefb_par *par)
 		vga_out8(0x3d4, 0x68, par);	/* memory control 1 */
 		if ((vga_in8(0x3d5, par) & 0xC0) == (0x01 << 6))
 			RamSavage4[1] = 8;
-
-		/*FALLTHROUGH*/
+		fallthrough;
 
 	case S3_SAVAGE2000:
 		videoRam = RamSavage4[(config1 & 0xE0) >> 5] * 1024;

drivers/video/fbdev/sh_mobile_lcdcfb.c

@@ -1594,7 +1594,7 @@ sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
 	case V4L2_PIX_FMT_NV12:
 	case V4L2_PIX_FMT_NV21:
 		info->fix.ypanstep = 2;
-		/* Fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_NV16:
 	case V4L2_PIX_FMT_NV61:
 		info->fix.xpanstep = 2;
@@ -2085,7 +2085,7 @@ sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
 	case V4L2_PIX_FMT_NV12:
 	case V4L2_PIX_FMT_NV21:
 		info->fix.ypanstep = 2;
-		/* Fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_NV16:
 	case V4L2_PIX_FMT_NV61:
 		info->fix.xpanstep = 2;

drivers/video/fbdev/sm501fb.c

@@ -1005,7 +1005,7 @@ static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
 	case FB_BLANK_POWERDOWN:
 		ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
 		sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
-		/* fall through */
+		fallthrough;
 
 	case FB_BLANK_NORMAL:
 		ctrl |= SM501_DC_CRT_CONTROL_BLANK;

drivers/video/fbdev/tdfxfb.c

@@ -523,7 +523,7 @@ static int tdfxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 	case 32:
 		var->transp.offset = 24;
 		var->transp.length = 8;
-		/* fall through */
+		fallthrough;
 	case 24:
 		var->red.offset = 16;
 		var->green.offset = 8;

drivers/video/fbdev/xen-fbfront.c

@@ -677,7 +677,7 @@ static void xenfb_backend_changed(struct xenbus_device *dev,
 	case XenbusStateClosed:
 		if (dev->state == XenbusStateClosed)
 			break;
-		/* fall through - Missed the backend's CLOSING state. */
+		fallthrough;	/* Missed the backend's CLOSING state */
 	case XenbusStateClosing:
 		xenbus_frontend_closed(dev);
 		break;