diff options
| author | Alexander Motin <mav@FreeBSD.org> | 2026-02-09 19:23:26 +0000 |
|---|---|---|
| committer | Alexander Motin <mav@FreeBSD.org> | 2026-02-09 19:23:26 +0000 |
| commit | b9d3945831fc7a60f2065c7a0afc747dc5653c9f (patch) | |
| tree | f5a976f36690837af7434eee05b80d3820307ee2 | |
| parent | ec6cf0c52698f9056cb17456717849653a03f7e4 (diff) | |
ahci: Restrict NVMe redirection by BAR size
Attempts to access vendor-specific registers on emulator of older
Intel hardware was reported to confuse one. Since the redirection
obviously require BAR size bigger than normal 2KB of AHCI, add
the condition, similar to what Linux is doing.
Requested by: kib
MFC after: 2 weeks
| -rw-r--r-- | sys/dev/ahci/ahci_pci.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/dev/ahci/ahci_pci.c b/sys/dev/ahci/ahci_pci.c index 2b4cb37275a6..ed1b734f70be 100644 --- a/sys/dev/ahci/ahci_pci.c +++ b/sys/dev/ahci/ahci_pci.c @@ -523,7 +523,8 @@ ahci_pci_attach(device_t dev) * here, or the user has to change the mode in the BIOS * from RST to AHCI. */ - if (pci_get_vendor(dev) == 0x8086) { + if (pci_get_vendor(dev) == 0x8086 && + rman_get_size(ctlr->r_mem) >= 512 * 1024) { uint32_t vscap; vscap = ATA_INL(ctlr->r_mem, AHCI_VSCAP); |