6.12-stable review patch. If anyone has any objections, please let me know.
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From: Pavel Begunkov asml.silence@gmail.com
[ Upstream commit cbc16bceea784210d585a42ac9f8f10ce62b300e ]
page_pool_ref_netmem() should work with either netmem representation, but currently it casts to a page with netmem_to_page(), which will fail with net iovs. Use netmem_get_pp_ref_count_ref() instead.
Fixes: 8ab79ed50cf1 ("page_pool: devmem support") Signed-off-by: Pavel Begunkov asml.silence@gmail.com Signed-off-by: David Wei dw@davidwei.uk Link: https://lore.kernel.org/20250108220644.3528845-2-dw@davidwei.uk Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/net/page_pool/helpers.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/page_pool/helpers.h b/include/net/page_pool/helpers.h index 793e6fd78bc5c..60a5347922bec 100644 --- a/include/net/page_pool/helpers.h +++ b/include/net/page_pool/helpers.h @@ -294,7 +294,7 @@ static inline long page_pool_unref_page(struct page *page, long nr)
static inline void page_pool_ref_netmem(netmem_ref netmem) { - atomic_long_inc(&netmem_to_page(netmem)->pp_ref_count); + atomic_long_inc(netmem_get_pp_ref_count_ref(netmem)); }
static inline void page_pool_ref_page(struct page *page)