media: staging: media: atomisp: Convert kmap() to kmap_local_page()

The use of kmap() is being deprecated in favor of kmap_local_page() where
it is feasible. With kmap_local_page(), the mapping is per thread, CPU
local and not globally visible.

load_and_flush_by_kmap() is a function where the use of kmap_local_page()
in place of kmap() is correctly suited.

Convert load_and_flush_by_kmap() from kmap() to kmap_local_page().

Link: https://lore.kernel.org/linux-media/20220408223129.3844-1-fmdefrancesco@gmail.com
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/staging/media/atomisp/pci/hmm/hmm.c b/drivers/staging/media/atomisp/pci/hmm/hmm.c
index 7f0fac779fd5dc7991e865f211fc9dd1cf4447d9..74cc388a0eefc4b8bd3cc6788227a9293144aabc 100644 (file)
--- a/drivers/staging/media/atomisp/pci/hmm/hmm.c
+++ b/drivers/staging/media/atomisp/pci/hmm/hmm.c
@@ -295,7 +295,7 @@ static int load_and_flush_by_kmap(ia_css_ptr virt, void *data,
                idx = (virt - bo->start) >> PAGE_SHIFT;
                offset = (virt - bo->start) - (idx << PAGE_SHIFT);
 
-               src = (char *)kmap(bo->pages[idx]) + offset;
+               src = (char *)kmap_local_page(bo->pages[idx]) + offset;
 
                if ((bytes + offset) >= PAGE_SIZE) {
                        len = PAGE_SIZE - offset;
@@ -314,7 +314,7 @@ static int load_and_flush_by_kmap(ia_css_ptr virt, void *data,
 
                clflush_cache_range(src, len);
 
-               kunmap(bo->pages[idx]);
+               kunmap_local(src);
        }
 
        return 0;