[PATCH net v1] page_pool: fix incorrect mp_ops error handling

[Mina Almasry]

Minor fix to the memory provider error handling, we should be jumping to
free_ptr_ring in this error case rather than returning directly.

Found by code-inspection.

Cc: skhawaja@xxxxxxxxxx

Fixes: b400f4b87430 ("page_pool: Set `dma_sync` to false for devmem memory provider")
Signed-off-by: Mina Almasry <almasrymina@xxxxxxxxxx>

---
 net/core/page_pool.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 343a6cac21e3..ba70569bd4b0 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -287,8 +287,10 @@ static int page_pool_init(struct page_pool *pool,
 	}
 
 	if (pool->mp_ops) {
-		if (!pool->dma_map || !pool->dma_sync)
-			return -EOPNOTSUPP;
+		if (!pool->dma_map || !pool->dma_sync) {
+			err = -EOPNOTSUPP;
+			goto free_ptr_ring;
+		}
 
 		if (WARN_ON(!is_kernel_rodata((unsigned long)pool->mp_ops))) {
 			err = -EFAULT;

base-commit: c42be534547d6e45c155c347dd792b6ad9c24def
-- 
2.51.0.rc1.193.gad69d77794-goog