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Message-ID: <7d0bca47-db75-4a68-9565-7bdb5995d1e3@kili.mountain>
Date: Tue, 11 Apr 2023 12:03:39 +0300
From: Dan Carpenter <error27@...il.com>
To: oe-kbuild@...ts.linux.dev, Lyude Paul <lyude@...hat.com>,
dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
Thomas Zimmermann <tzimmermann@...e.de>,
Karol Herbst <kherbst@...hat.com>,
Jani Nikula <jani.nikula@...el.com>,
open list <linux-kernel@...r.kernel.org>,
Ben Skeggs <bskeggs@...hat.com>,
Dave Airlie <airlied@...hat.com>,
Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH 2/2] drm/nouveau/kms: Add INHERIT ioctl to nvkm/nvif for
reading IOR state
Hi Lyude,
kernel test robot noticed the following build warnings:
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Lyude-Paul/drm-nouveau-kms-Add-INHERIT-ioctl-to-nvkm-nvif-for-reading-IOR-state/20230408-062329
base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link: https://lore.kernel.org/r/20230407222133.1425969-2-lyude%40redhat.com
patch subject: [PATCH 2/2] drm/nouveau/kms: Add INHERIT ioctl to nvkm/nvif for reading IOR state
config: csky-randconfig-m031-20230409 (https://download.01.org/0day-ci/archive/20230409/202304091929.Sr0CfHlN-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Reported-by: Dan Carpenter <error27@...il.com>
| Link: https://lore.kernel.org/r/202304091929.Sr0CfHlN-lkp@intel.com/
New smatch warnings:
drivers/gpu/drm/nouveau/dispnv50/disp.c:2518 nv50_display_read_hw_or_state() error: uninitialized symbol 'head_idx'.
vim +/head_idx +2518 drivers/gpu/drm/nouveau/dispnv50/disp.c
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2477 static inline void
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2478 nv50_display_read_hw_or_state(struct drm_device *dev, struct nv50_disp *disp,
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2479 struct nouveau_encoder *outp)
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2480 {
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2481 struct drm_crtc *crtc;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2482 struct drm_connector_list_iter conn_iter;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2483 struct drm_connector *conn;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2484 struct nv50_head_atom *armh;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2485 const u32 encoder_mask = drm_encoder_mask(&outp->base.base);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2486 bool found_conn = false, found_head = false;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2487 u8 proto;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2488 int head_idx;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2489 int ret;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2490
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2491 switch (outp->dcb->type) {
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2492 case DCB_OUTPUT_TMDS:
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2493 ret = nvif_outp_inherit_tmds(&outp->outp, &proto);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2494 break;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2495 case DCB_OUTPUT_DP:
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2496 ret = nvif_outp_inherit_dp(&outp->outp, &proto);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2497 break;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2498 case DCB_OUTPUT_LVDS:
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2499 ret = nvif_outp_inherit_lvds(&outp->outp, &proto);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2500 break;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2501 case DCB_OUTPUT_ANALOG:
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2502 ret = nvif_outp_inherit_rgb_crt(&outp->outp, &proto);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2503 break;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2504 default:
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2505 drm_dbg_kms(dev, "Readback for %s not implemented yet, skipping\n",
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2506 outp->base.base.name);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2507 drm_WARN_ON(dev, true);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2508 return;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2509 }
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2510 if (ret >= 0) {
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2511 head_idx = ret;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2512 ret = 0;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2513 } else if (ret == -ENODEV) {
What if it fails with a different error code?
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2514 return;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2515 }
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2516
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2517 drm_for_each_crtc(crtc, dev) {
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 @2518 if (crtc->index != head_idx)
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2519 continue;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2520
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2521 armh = nv50_head_atom(crtc->state);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2522 found_head = true;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2523 break;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2524 }
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2525 if (drm_WARN_ON(dev, !found_head))
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2526 return;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2527
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2528 /* Figure out which connector is being used by this encoder */
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2529 drm_connector_list_iter_begin(dev, &conn_iter);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2530 nouveau_for_each_non_mst_connector_iter(conn, &conn_iter) {
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2531 if (nouveau_connector(conn)->index == outp->dcb->connector) {
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2532 found_conn = true;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2533 break;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2534 }
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2535 }
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2536 drm_connector_list_iter_end(&conn_iter);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2537 if (drm_WARN_ON(dev, !found_conn))
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2538 return;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2539
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2540 armh->state.encoder_mask = encoder_mask;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2541 armh->state.connector_mask = drm_connector_mask(conn);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2542 armh->state.active = true;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2543 armh->state.enable = true;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2544
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2545 outp->crtc = crtc;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2546 outp->ctrl = NVVAL(NV507D, SOR_SET_CONTROL, PROTOCOL, proto) | BIT(crtc->index);
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2547
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2548 conn->state->crtc = crtc;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2549 conn->state->best_encoder = &outp->base.base;
a3d963915cf6f2 drivers/gpu/drm/nouveau/dispnv50/disp.c Lyude Paul 2023-04-07 2550 }
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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