Date: Wed, 16 Jun 2021 18:04:37 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 253990] NTB driver causes panic: page fault Message-ID: <bug-253990-7501-AII0DpTXzw@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-253990-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-253990-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D253990 --- Comment #2 from Alexander Motin <mav@FreeBSD.org> --- I am definitely agree that ntb->hw_info->db_count assignment in amd_ntb_init_isr() is logically incorrect. May be it could be per-instance= . I have documentation not hardware for the AMD NTB, but I guess the proper solution may instead be to implement multiple doorbells with single/few interrupt vectors instead of reducing their count. For example, PLX NTB dr= iver uses single legacy IRQ to implement 16 doorbells. Changing number of doorb= ells depending on attach errors may cause a problem for upper layers, when they = try to use expected number of doorbells and won't find them. --=20 You are receiving this mail because: You are the assignee for the bug.=
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