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| author | Oded Gabbay <ogabbay@kernel.org> | 2020-10-29 19:38:31 +0300 |
|---|---|---|
| committer | Oded Gabbay <ogabbay@kernel.org> | 2020-11-30 11:47:33 +0300 |
| commit | 28e052c95292410922d487c48d2f841ccd6495e7 (patch) | |
| tree | 4daa31b0d652d6954e4661f098186316b9d03be1 | |
| parent | 66a76401c50b2638fd95dd31f365fd64be307d6a (diff) | |
| download | linux-28e052c95292410922d487c48d2f841ccd6495e7.tar.xz | |
habanalabs: restore vm_pgoff after mmap
Due to using dma_mmap_coherent() to perform mmap of dma memory, we
had to clear the vm_pgoff field before calling that function.
However, that broke the userspace (profiler tool) as they relied
on searching the /proc/self/maps for these values to correctly
"disassemble" the topology recipe.
To re-enable that functionality, the driver can simply restore the
value of vm_pgoff before returning to userspace but after calling
dma_mmap_coherent().
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
| -rw-r--r-- | drivers/misc/habanalabs/common/command_buffer.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/common/command_buffer.c b/drivers/misc/habanalabs/common/command_buffer.c index 03ffcead1855..0c482358f350 100644 --- a/drivers/misc/habanalabs/common/command_buffer.c +++ b/drivers/misc/habanalabs/common/command_buffer.c @@ -517,6 +517,7 @@ int hl_cb_mmap(struct hl_fpriv *hpriv, struct vm_area_struct *vma) } cb->mmap_size = cb->size; + vma->vm_pgoff = handle; return 0; |