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media: staging: media: atomisp: Use kmap_local_page() in hmm_set()

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The use of kmap() is being deprecated in favor of kmap_local_page()
where it is feasible. In file pci/hmm/hmm.c, function hmm_set() calls
kmap() / kunmap() where kmap_local_page() can instead do the mapping.

With kmap_local_page(), the mapping is per thread, CPU local and not
globally visible. Therefore, hmm_set()() is a function where the use
of kmap_local_page() in place of kmap() is correctly suited.

Convert the calls of kmap() / kunmap() to kmap_local_page() /
kunmap_local().

Link: https://lore.kernel.org/linux-media/20220413212210.18494-1-fmdefrancesco@gmail.com
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Fabio M. De Francesco 2022-04-13 22:22:10 +01:00 committed by Mauro Carvalho Chehab
parent 2ad935a15f
commit aab1c42a9d
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/media/atomisp/pci/hmm/hmm.c
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@ -508,7 +508,7 @@ int hmm_set(ia_css_ptr virt, int c, unsigned int bytes)
idx = (virt - bo->start) >> PAGE_SHIFT;
offset = (virt - bo->start) - (idx << PAGE_SHIFT);
des = (char *)kmap(bo->pages[idx]) + offset;
des = (char *)kmap_local_page(bo->pages[idx]) + offset;
if ((bytes + offset) >= PAGE_SIZE) {
len = PAGE_SIZE - offset;
@ -524,7 +524,7 @@ int hmm_set(ia_css_ptr virt, int c, unsigned int bytes)
clflush_cache_range(des, len);
kunmap(bo->pages[idx]);
kunmap_local(des);
}
return 0;