Hi Günter, On Thu, Aug 8, 2019 at 5:42 AM Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > On Fri, Jul 26, 2019 at 07:23:13PM +0200, Andrzej Pietrasiewicz wrote: > > Use the ddc pointer provided by the generic connector. > > > > Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx> > > Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx> > > This patch results in a crash when running qemu:versatilepb. > > Unable to handle kernel NULL pointer dereference at virtual address 000000c5 > pgd = (ptrval) > [000000c5] *pgd=00000000 > Internal error: Oops: 5 [#1] ARM > Modules linked in: > CPU: 0 PID: 1 Comm: swapper Not tainted 5.3.0-rc1+ #1 > Hardware name: ARM-Versatile (Device Tree Support) > PC is at sysfs_do_create_link_sd+0x38/0xd8 > LR is at sysfs_do_create_link_sd+0x38/0xd8 > [<c01ac94c>] (sysfs_do_create_link_sd) from [<c04c7fc0>] (drm_connector_register.part.1+0x40/0xa0) > [<c04c7fc0>] (drm_connector_register.part.1) from [<c04c87e0>] (drm_connector_register_all+0x90/0xb8) > [<c04c87e0>] (drm_connector_register_all) from [<c04cefcc>] (drm_modeset_register_all+0x44/0x6c) > [<c04cefcc>] (drm_modeset_register_all) from [<c04b4ebc>] (drm_dev_register+0x15c/0x1c0) > [<c04b4ebc>] (drm_dev_register) from [<c04df2f8>] (pl111_amba_probe+0x2e0/0x4ac) > [<c04df2f8>] (pl111_amba_probe) from [<c045e8d8>] (amba_probe+0x9c/0x118) Seeing the same thing on Salvator-XS, due to vga->ddc being -ENODEV. > # first bad commit: [a4f9087e85de141e4e6d21ac2c583ae096cc9aba] drm/bridge: dumb-vga-dac: Provide ddc symlink in connector sysfs directory Fix sent https://lore.kernel.org/lkml/20190813093046.4976-1-geert+renesas@xxxxxxxxx/ Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
