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| author |   kettenis <kettenis@openbsd.org> | 2016-02-04 07:16:18 +0000 |
|---|---|---|
| committer | kettenis <kettenis@openbsd.org> | 2016-02-04 07:16:18 +0000 |
| commit | 643547056573aa3239e748b408dd929a3eac25d7 (patch) | |
| tree | 467fdc6aef3cbec589f07ddee7682dc5f9487855 | |
| parent | sync (diff) | |
| download | wireguard-openbsd-643547056573aa3239e748b408dd929a3eac25d7.tar.xz wireguard-openbsd-643547056573aa3239e748b408dd929a3eac25d7.zip | |
If the ROM size is 0, we won't be able to read the video BIOS from it.
Bail out early to prevent a panic from calling bus_space_map(9) with size 0.
| -rw-r--r-- | sys/dev/pci/drm/radeon/radeon_bios.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/dev/pci/drm/radeon/radeon_bios.c b/sys/dev/pci/drm/radeon/radeon_bios.c index ff98adee436..7d7b8ee123f 100644 --- a/sys/dev/pci/drm/radeon/radeon_bios.c +++ b/sys/dev/pci/drm/radeon/radeon_bios.c @@ -1,4 +1,4 @@ -/* $OpenBSD: radeon_bios.c,v 1.6 2015/04/12 12:14:30 jsg Exp $ */ +/* $OpenBSD: radeon_bios.c,v 1.7 2016/02/04 07:16:18 kettenis Exp $ */ /* * Copyright 2008 Advanced Micro Devices, Inc. * Copyright 2008 Red Hat Inc. @@ -144,6 +144,8 @@ static bool radeon_read_bios(struct radeon_device *rdev) pci_conf_write(rdev->pc, rdev->pa_tag, PCI_ROM_REG, address); size = PCI_ROM_SIZE(mask); + if (size == 0) + return false; rc = bus_space_map(rdev->memt, PCI_ROM_ADDR(address), size, BUS_SPACE_MAP_LINEAR, &romh); if (rc != 0) { |