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From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 206895] [amdgpu] crash while using opencl from amdgpu-pro on kernel 5.5.10
Date: Mon, 23 Mar 2020 12:44:49 +0000	[thread overview]
Message-ID: <bug-206895-2300-ge0fzKngqQ@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-206895-2300@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=206895

--- Comment #9 from bigbeeshane@gmail.com ---
Also validated last night that the following patch to disable the merging of sg
sections within dma-iommu fixes the issue I am seeing 


--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -779,7 +779,7 @@ static int __finalise_sg(struct device *dev, struct
scatterlist *sg, int nents,
                 * - but doesn't fall at a segment boundary
                 * - and wouldn't make the resulting output segment too long
                 */
-               if (cur_len && !s_iova_off && (dma_addr & seg_mask) &&
+               if (0 && cur_len && !s_iova_off && (dma_addr & seg_mask) &&
                    (max_len - cur_len >= s_length)) {


I guess amdgpu needs to be updated to handle the case where the iommu driver is
merging some of the requested segments ?

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  parent reply	other threads:[~2020-03-23 12:44 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-20 19:55 [Bug 206895] New: [amdgpu] crash while using opencl from amdgpu-pro on kernel 5.5.10 bugzilla-daemon
2020-03-20 20:32 ` [Bug 206895] " bugzilla-daemon
2020-03-20 20:41 ` bugzilla-daemon
2020-03-21 14:52 ` bugzilla-daemon
2020-03-21 23:09 ` bugzilla-daemon
2020-03-22 10:35 ` bugzilla-daemon
2020-03-22 23:45 ` bugzilla-daemon
2020-03-22 23:47 ` bugzilla-daemon
2020-03-23  0:38 ` bugzilla-daemon
2020-03-23 12:44 ` bugzilla-daemon [this message]
2020-03-23 12:46 ` [Bug 206895] [amdgpu] crash while using opencl from amdgpu-pro on kernel 5.5.10 & 5.6.0-rc6 bugzilla-daemon
2020-03-23 13:57 ` bugzilla-daemon
2020-03-23 15:59 ` bugzilla-daemon
2020-03-23 16:01 ` bugzilla-daemon
2020-03-23 16:11 ` bugzilla-daemon
2020-03-23 16:16 ` bugzilla-daemon
2020-03-23 16:18 ` bugzilla-daemon
2020-03-23 17:01 ` bugzilla-daemon

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