Date: Sat, 08 Aug 2026 00:44:36 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 297064] em(4) 82541PI silent TX/RX wedge Message-ID: <bug-297064-7501-KtSPOw2dwo@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-297064-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=297064 --- Comment #9 from commit-hook@FreeBSD.org --- A commit in branch stable/14 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=198908895f18c81d4e645199b5992d6e65922c2f commit 198908895f18c81d4e645199b5992d6e65922c2f Author: Kevin Bowling <kbowling@FreeBSD.org> AuthorDate: 2026-07-31 07:02:22 +0000 Commit: Kevin Bowling <kbowling@FreeBSD.org> CommitDate: 2026-08-08 00:39:45 +0000 e1000: restrict conventional PCI DMA to 32 bits Some conventional PCI e1000 configurations hang when given DMA addresses above 4 GB, particularly on systems using AMD HyperTransport-to-PCI bridges. Linux has restricted e1000 to DMA32 in PCI mode since 2011 for the same failure class in commit e508be174ad36b0cf9b324cd04978c2b13c21502. Set iflib's DMA width after determining the negotiated bus type. This covers descriptor and packet-buffer mappings while preserving 64-bit DMA for PCI-X and PCIe devices and providing a conditional tunable. PR: 297064 Reported by: Alexander Leidinger <netchild@FreeBSD.org> Tested by: Alexander Leidinger <netchild@FreeBSD.org> (cherry picked from commit 41759495769dff87cd4ebbb257d4054128ea5b42) sys/dev/e1000/if_em.c | 21 +++++++++++++++++++++ sys/dev/e1000/if_em.h | 1 + 2 files changed, 22 insertions(+) -- You are receiving this mail because: You are the assignee for the bug.home | help
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