[PATCH 5.17 755/772] net: ipa: fix page free in ipa_endpoint_replenish_one()

Greg Kroah-Hartman
2022-06-07T21:54:35Z

From: Alex Elder <elder@linaro.org>

commit 70132763d5d2e94cd185e3aa92ac6a3ba89068fa upstream.

Currently the (possibly compound) pages 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_replenish_one()
to use put_page() instead.

Fixes: 6a606b90153b8 ("net: ipa: allocate transaction in replenish loop")
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>
---
drivers/net/ipa/ipa_endpoint.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -1062,7 +1062,7 @@ static int ipa_endpoint_replenish_one(st
err_trans_free:
gsi_trans_free(trans);
err_free_pages:
- __free_pages(page, get_order(IPA_RX_BUFFER_SIZE));
+ put_page(page);

return -ENOMEM;
}