accel/amdxdna: Use unsigned long for nr_pages in amdxdna_hmm_register()

nr_pages is declared as u32 in amdxdna_hmm_register(), which may not be
large enough to represent the number of pages for large mappings.

Use unsigned long for nr_pages to avoid potential overflow.

Fixes: ac49797c1815 ("accel/amdxdna: Add GEM buffer object management")
Reviewed-by: Max Zhen <max.zhen@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260616061532.3533469-1-lizhi.hou@amd.com

diff --git a/drivers/accel/amdxdna/amdxdna_gem.c b/drivers/accel/amdxdna/amdxdna_gem.c
index 45abd6a804ccb5ff1db439101274ed0596e8e6cc..3afa5ffff93ffa1b5015d33d613d4958eaab2805 100644 (file)
--- a/drivers/accel/amdxdna/amdxdna_gem.c
+++ b/drivers/accel/amdxdna/amdxdna_gem.c
@@ -346,7 +346,7 @@ static int amdxdna_hmm_register(struct amdxdna_gem_obj *abo,
        unsigned long len = vma->vm_end - vma->vm_start;
        unsigned long addr = vma->vm_start;
        struct amdxdna_umap *mapp;
-       u32 nr_pages;
+       unsigned long nr_pages;
        int ret;
 
        if (!amdxdna_pasid_on(abo->client)) {