Re: [PATCH] staging: fbtft: fix checkpatch.pl struct should normally be const
From: kernel test robot
Date: Thu May 19 2022 - 21:35:03 EST
Hi Uri,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on staging/staging-testing]
url: https://github.com/intel-lab-lkp/linux/commits/Uri-Arev/staging-fbtft-fix-checkpatch-pl-struct-should-normally-be-const/20220520-012948
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git 4d0cc9e0e53e9946d7b8dc58279c62dfa7a2191b
config: x86_64-randconfig-a013 (https://download.01.org/0day-ci/archive/20220520/202205200955.wBcgkXij-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-1) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/d26e139bfc29011b0a147df71f0b91485189c66e
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Uri-Arev/staging-fbtft-fix-checkpatch-pl-struct-should-normally-be-const/20220520-012948
git checkout d26e139bfc29011b0a147df71f0b91485189c66e
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
drivers/staging/fbtft/fbtft-core.c: In function 'fbtft_framebuffer_alloc':
>> drivers/staging/fbtft/fbtft-core.c:617:15: error: type defaults to 'int' in declaration of 'fbops' [-Werror=implicit-int]
617 | const fbops = devm_kzalloc(dev, sizeof(struct fb_ops), GFP_KERNEL);
| ^~~~~
>> drivers/staging/fbtft/fbtft-core.c:617:15: error: conflicting type qualifiers for 'fbops'
drivers/staging/fbtft/fbtft-core.c:542:30: note: previous definition of 'fbops' with type 'const struct fb_ops *'
542 | const struct fb_ops *fbops = NULL;
| ^~~~~
drivers/staging/fbtft/fbtft-core.c:617:23: warning: initialization of 'int' from 'void *' makes integer from pointer without a cast [-Wint-conversion]
617 | const fbops = devm_kzalloc(dev, sizeof(struct fb_ops), GFP_KERNEL);
| ^~~~~~~~~~~~
drivers/staging/fbtft/fbtft-core.c:617:9: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
617 | const fbops = devm_kzalloc(dev, sizeof(struct fb_ops), GFP_KERNEL);
| ^~~~~
drivers/staging/fbtft/fbtft-core.c:644:21: warning: assignment to 'const struct fb_ops *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
644 | info->fbops = fbops;
| ^
>> drivers/staging/fbtft/fbtft-core.c:647:14: error: invalid type argument of '->' (have 'int')
647 | fbops->owner = dev->driver->owner;
| ^~
drivers/staging/fbtft/fbtft-core.c:648:14: error: invalid type argument of '->' (have 'int')
648 | fbops->fb_read = fb_sys_read;
| ^~
drivers/staging/fbtft/fbtft-core.c:649:14: error: invalid type argument of '->' (have 'int')
649 | fbops->fb_write = fbtft_fb_write;
| ^~
drivers/staging/fbtft/fbtft-core.c:650:14: error: invalid type argument of '->' (have 'int')
650 | fbops->fb_fillrect = fbtft_fb_fillrect;
| ^~
drivers/staging/fbtft/fbtft-core.c:651:14: error: invalid type argument of '->' (have 'int')
651 | fbops->fb_copyarea = fbtft_fb_copyarea;
| ^~
drivers/staging/fbtft/fbtft-core.c:652:14: error: invalid type argument of '->' (have 'int')
652 | fbops->fb_imageblit = fbtft_fb_imageblit;
| ^~
drivers/staging/fbtft/fbtft-core.c:653:14: error: invalid type argument of '->' (have 'int')
653 | fbops->fb_setcolreg = fbtft_fb_setcolreg;
| ^~
drivers/staging/fbtft/fbtft-core.c:654:14: error: invalid type argument of '->' (have 'int')
654 | fbops->fb_blank = fbtft_fb_blank;
| ^~
cc1: some warnings being treated as errors
vim +617 drivers/staging/fbtft/fbtft-core.c
516
517 /**
518 * fbtft_framebuffer_alloc - creates a new frame buffer info structure
519 *
520 * @display: pointer to structure describing the display
521 * @dev: pointer to the device for this fb, this can be NULL
522 * @pdata: platform data for the display in use
523 *
524 * Creates a new frame buffer info structure.
525 *
526 * Also creates and populates the following structures:
527 * info->fbops
528 * info->fbdefio
529 * info->pseudo_palette
530 * par->fbtftops
531 * par->txbuf
532 *
533 * Returns the new structure, or NULL if an error occurred.
534 *
535 */
536 struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display,
537 struct device *dev,
538 struct fbtft_platform_data *pdata)
539 {
540 struct fb_info *info;
541 struct fbtft_par *par;
542 const struct fb_ops *fbops = NULL;
543 struct fb_deferred_io *fbdefio = NULL;
544 u8 *vmem = NULL;
545 void *txbuf = NULL;
546 void *buf = NULL;
547 unsigned int width;
548 unsigned int height;
549 int txbuflen = display->txbuflen;
550 unsigned int bpp = display->bpp;
551 unsigned int fps = display->fps;
552 int vmem_size;
553 const s16 *init_sequence = display->init_sequence;
554 char *gamma = display->gamma;
555 u32 *gamma_curves = NULL;
556
557 /* sanity check */
558 if (display->gamma_num * display->gamma_len >
559 FBTFT_GAMMA_MAX_VALUES_TOTAL) {
560 dev_err(dev, "FBTFT_GAMMA_MAX_VALUES_TOTAL=%d is exceeded\n",
561 FBTFT_GAMMA_MAX_VALUES_TOTAL);
562 return NULL;
563 }
564
565 /* defaults */
566 if (!fps)
567 fps = 20;
568 if (!bpp)
569 bpp = 16;
570
571 if (!pdata) {
572 dev_err(dev, "platform data is missing\n");
573 return NULL;
574 }
575
576 /* override driver values? */
577 if (pdata->fps)
578 fps = pdata->fps;
579 if (pdata->txbuflen)
580 txbuflen = pdata->txbuflen;
581 if (pdata->display.init_sequence)
582 init_sequence = pdata->display.init_sequence;
583 if (pdata->gamma)
584 gamma = pdata->gamma;
585 if (pdata->display.debug)
586 display->debug = pdata->display.debug;
587 if (pdata->display.backlight)
588 display->backlight = pdata->display.backlight;
589 if (pdata->display.width)
590 display->width = pdata->display.width;
591 if (pdata->display.height)
592 display->height = pdata->display.height;
593 if (pdata->display.buswidth)
594 display->buswidth = pdata->display.buswidth;
595 if (pdata->display.regwidth)
596 display->regwidth = pdata->display.regwidth;
597
598 display->debug |= debug;
599 fbtft_expand_debug_value(&display->debug);
600
601 switch (pdata->rotate) {
602 case 90:
603 case 270:
604 width = display->height;
605 height = display->width;
606 break;
607 default:
608 width = display->width;
609 height = display->height;
610 }
611
612 vmem_size = display->width * display->height * bpp / 8;
613 vmem = vzalloc(vmem_size);
614 if (!vmem)
615 goto alloc_fail;
616
> 617 const fbops = devm_kzalloc(dev, sizeof(struct fb_ops), GFP_KERNEL);
618 if (!fbops)
619 goto alloc_fail;
620
621 fbdefio = devm_kzalloc(dev, sizeof(struct fb_deferred_io), GFP_KERNEL);
622 if (!fbdefio)
623 goto alloc_fail;
624
625 buf = devm_kzalloc(dev, 128, GFP_KERNEL);
626 if (!buf)
627 goto alloc_fail;
628
629 if (display->gamma_num && display->gamma_len) {
630 gamma_curves = devm_kcalloc(dev,
631 display->gamma_num *
632 display->gamma_len,
633 sizeof(gamma_curves[0]),
634 GFP_KERNEL);
635 if (!gamma_curves)
636 goto alloc_fail;
637 }
638
639 info = framebuffer_alloc(sizeof(struct fbtft_par), dev);
640 if (!info)
641 goto alloc_fail;
642
643 info->screen_buffer = vmem;
644 info->fbops = fbops;
645 info->fbdefio = fbdefio;
646
> 647 fbops->owner = dev->driver->owner;
648 fbops->fb_read = fb_sys_read;
649 fbops->fb_write = fbtft_fb_write;
650 fbops->fb_fillrect = fbtft_fb_fillrect;
651 fbops->fb_copyarea = fbtft_fb_copyarea;
652 fbops->fb_imageblit = fbtft_fb_imageblit;
653 fbops->fb_setcolreg = fbtft_fb_setcolreg;
654 fbops->fb_blank = fbtft_fb_blank;
655
656 fbdefio->delay = HZ / fps;
657 fbdefio->sort_pagelist = true;
658 fbdefio->deferred_io = fbtft_deferred_io;
659 fb_deferred_io_init(info);
660
661 snprintf(info->fix.id, sizeof(info->fix.id), "%s", dev->driver->name);
662 info->fix.type = FB_TYPE_PACKED_PIXELS;
663 info->fix.visual = FB_VISUAL_TRUECOLOR;
664 info->fix.xpanstep = 0;
665 info->fix.ypanstep = 0;
666 info->fix.ywrapstep = 0;
667 info->fix.line_length = width * bpp / 8;
668 info->fix.accel = FB_ACCEL_NONE;
669 info->fix.smem_len = vmem_size;
670
671 info->var.rotate = pdata->rotate;
672 info->var.xres = width;
673 info->var.yres = height;
674 info->var.xres_virtual = info->var.xres;
675 info->var.yres_virtual = info->var.yres;
676 info->var.bits_per_pixel = bpp;
677 info->var.nonstd = 1;
678
679 /* RGB565 */
680 info->var.red.offset = 11;
681 info->var.red.length = 5;
682 info->var.green.offset = 5;
683 info->var.green.length = 6;
684 info->var.blue.offset = 0;
685 info->var.blue.length = 5;
686 info->var.transp.offset = 0;
687 info->var.transp.length = 0;
688
689 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB;
690
691 par = info->par;
692 par->info = info;
693 par->pdata = pdata;
694 par->debug = display->debug;
695 par->buf = buf;
696 spin_lock_init(&par->dirty_lock);
697 par->bgr = pdata->bgr;
698 par->startbyte = pdata->startbyte;
699 par->init_sequence = init_sequence;
700 par->gamma.curves = gamma_curves;
701 par->gamma.num_curves = display->gamma_num;
702 par->gamma.num_values = display->gamma_len;
703 mutex_init(&par->gamma.lock);
704 info->pseudo_palette = par->pseudo_palette;
705
706 if (par->gamma.curves && gamma) {
707 if (fbtft_gamma_parse_str(par, par->gamma.curves, gamma,
708 strlen(gamma)))
709 goto release_framebuf;
710 }
711
712 /* Transmit buffer */
713 if (txbuflen == -1)
714 txbuflen = vmem_size + 2; /* add in case startbyte is used */
715 if (txbuflen >= vmem_size + 2)
716 txbuflen = 0;
717
--
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