Date: Thu, 19 Oct 2023 21:41:18 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 259541] [smartpqi] panic: Segment size is not aligned, in a call to bus_dmamap_load_ccb() from smartpqi_cam_action. Message-ID: <bug-259541-227-E6M7FMQ2qP@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-259541-227@https.bugs.freebsd.org/bugzilla/> References: <bug-259541-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D259541 --- Comment #6 from commit-hook@FreeBSD.org --- A commit in branch releng/14.0 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=3D0efd0d6fa7e0d713ea7e4e9a3e3ac7858= 475f707 commit 0efd0d6fa7e0d713ea7e4e9a3e3ac7858475f707 Author: John Hall <john.hall@microchip.com> AuthorDate: 2023-10-19 03:25:32 +0000 Commit: Warner Losh <imp@FreeBSD.org> CommitDate: 2023-10-19 21:37:33 +0000 smartpqi: Change alignment for dma tags Problem: Under certain I/O conditions, a program doing large block disk reads can cause a controller to crash. Root Cause: The SCSI read request and destination address in the BDMA descriptor is incorrect, causing the BDMA engine in the controller to assert. Fix: Change the alignment for creating bus_dma_tags in the driver from PAGE_SIZE (4k) to 1, which allows the controller to manage it's own address range for BDMA transactions. Risk: Medium Exposure: This reverts a change first made to support NVMe drives on Excalibur. At that time a 4k alignment was necessary. This no longer seems to be the case. PR: 259541 Reported by: Ka Ho Ng <khng@freebsd.org> Reviewed by: imp Differential Revision: https://reviews.freebsd.org/D41619 (cherry picked from commit f07b267d8cc87e88be3c78aa69504b5ebc6571ee) (cherry picked from commit 01619a8fafcfd99d1811b2c14a92bac1a48c6d31) Approved-by: re (gjb) sys/dev/smartpqi/smartpqi_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --=20 You are receiving this mail because: You are the assignee for the bug.=
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