[Bug 293830] ahci: fix AMD SB7x0/SB8x0/SB9x0 instability with MSI enabled (0x43911002)

In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 293830] ahci: AMD SB7x0/SB8x0/SB9x0 unstable with MSI enabled (0x43911002)"
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From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 26 Apr 2026 07:59:38 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293830

--- Comment #1 from Vadler Gábor <vadlerg@freemail.hu> ---
I do not now if it is expected to provide more information about the previously
enclosed patch solution, but I can state that the patched kernel is working all
right.

DMESG

ahci0: <AMD SB7x0/SB8x0/SB9x0 AHCI SATA controller> port
0xc000-0xc007,0xb000-0xb003,0xa000-0xa007,0x9000-0x9003,0x8000-0x800f mem
0xfe4ffc00-0xfe4fffff irq 19 at device 17.0 on pci0
ahci0: AHCI v1.20 with 6 3Gbps ports, Port Multiplier supported
ahci0: quirks=0x22000<ATI_PMP_BUG,1MSI>
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich1: <AHCI channel> at channel 1 on ahci0
ahcich2: <AHCI channel> at channel 2 on ahci0
ahcich3: <AHCI channel> at channel 3 on ahci0
ahcich4: <AHCI channel> at channel 4 on ahci0
ahcich5: <AHCI channel> at channel 5 on ahci0
ada0 at ahcich0 bus 0 scbus1 target 0 lun 0
ada0: <ST26000NM000C-3WE103 SN02> ACS-5 ATA SATA 3.x device
ada0: Serial Number --------
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 24796160MB (50782535680 512 byte sectors)

etc.

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