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gpu: nova-core: do not consider 0xBB77 as a valid PCI ROM header signature

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Nvidia GPUs have some PCI expansion ROM sections that have an Nvidia-
specific signature instead of 0xAA55.  Signature 0xBB77 is actually an
internal-only value that has been deprecated for over a decade.
Nova-core will never encounter a GPU with that signature, so don't look
for it.

Signed-off-by: Timur Tabi <ttabi@nvidia.com>
Reviewed-by: Eliot Courtney <ecourtney@nvidia.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260417191359.1307434-3-ttabi@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
This commit is contained in:
Timur Tabi 2026-04-17 14:13:55 -05:00 committed by Alexandre Courbot
parent c1dca0cb0e
commit 44dc8bd6b5
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/nova-core/vbios.rs
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@ -491,7 +491,7 @@ fn new(dev: &device::Device, data: &[u8]) -> Result<Self> {
// Check for valid ROM signatures.
match signature {
0xAA55 | 0xBB77 | 0x4E56 => {}
0xAA55 | 0x4E56 => {}
_ => {
dev_err!(dev, "ROM signature unknown {:#x}\n", signature);
return Err(EINVAL);