From: Alex Elder <elder@linaro.org>
Date: Thu, 26 May 2022 15:23:13 +0000 (-0500)
Subject: net: ipa: fix page free in ipa_endpoint_trans_release()
X-Git-Tag: v5.17.14~21
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d6f0b1a63a618c257433000ba1c082aa596f6160;p=thirdparty%2Fkernel%2Fstable.git

net: ipa: fix page free in ipa_endpoint_trans_release()

commit 155c0c90bca918de6e4327275dfc1d97fd604115 upstream.

Currently the (possibly compound) page used for receive buffers are
freed using __free_pages().  But according to this comment above the
definition of that function, that's wrong:
    If you want to use the page's reference count to decide when
    to free the allocation, you should allocate a compound page,
    and use put_page() instead of __free_pages().

Convert the call to __free_pages() in ipa_endpoint_trans_release()
to use put_page() instead.

Fixes: ed23f02680caa ("net: ipa: define per-endpoint receive buffer size")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index b421bb1cc23de..c46084c87ec1b 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -1402,7 +1402,7 @@ void ipa_endpoint_trans_release(struct ipa_endpoint *endpoint,
 		struct page *page = trans->data;
 
 		if (page)
-			__free_pages(page, get_order(IPA_RX_BUFFER_SIZE));
+			put_page(page);
 	}
 }