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Subject: Re: [Intel-wired-lan] [PATCH net] idpf: fix mismatched free function for dma_alloc_coherent X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" --------------s8YC5xAGgKNEZTivc4OKXvDr Content-Type: multipart/mixed; boundary="------------W1T0PlmnfegAt0GGE0hxfVQ5"; protected-headers="v1" From: Jacob Keller To: Alok Tiwari , krishneil.k.singh@intel.com, alan.brady@intel.com, aleksander.lobakin@intel.com, andrew+netdev@lunn.ch, anthony.l.nguyen@intel.com, przemyslaw.kitszel@intel.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, "Tantilov, Emil S" , Joshua Hay Message-ID: <1dda14ca-7e58-448e-8b05-e5f6293911f0@intel.com> Subject: Re: [Intel-wired-lan] [PATCH net] idpf: fix mismatched free function for dma_alloc_coherent References: <20250925180212.415093-1-alok.a.tiwari@oracle.com> In-Reply-To: <20250925180212.415093-1-alok.a.tiwari@oracle.com> --------------W1T0PlmnfegAt0GGE0hxfVQ5 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 9/25/2025 11:02 AM, Alok Tiwari wrote: > The mailbox receive path allocates coherent DMA memory with > dma_alloc_coherent(), but frees it with dmam_free_coherent(). > This is incorrect since dmam_free_coherent() is only valid for > buffers allocated with dmam_alloc_coherent(). >=20 > Fix the mismatch by using dma_free_coherent() instead of > dmam_free_coherent >=20 > Fixes: e54232da1238 ("idpf: refactor idpf_recv_mb_msg") > Signed-off-by: Alok Tiwari > --- This is tagged for net, not iwl-net. The fix seems obvious to me, and unlikely to be covered well by validation tests, due to being an error cleanup flow. Reviewed-by: Jacob Keller I don't have an issue with this being taken directly to net, but would appreciate an ACK by someone from the idpf driver team first to make sure we're in agreement. Alternatively, if anyone has objection and would prefer I pick this up for IWL net dev-queue, please let me know. > drivers/net/ethernet/intel/idpf/idpf_virtchnl.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) >=20 > diff --git a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c b/drivers/= net/ethernet/intel/idpf/idpf_virtchnl.c > index 6330d4a0ae07..c1f34381333d 100644 > --- a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c > +++ b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c > @@ -702,9 +702,9 @@ int idpf_recv_mb_msg(struct idpf_adapter *adapter) > /* If post failed clear the only buffer we supplied */ > if (post_err) { > if (dma_mem) > - dmam_free_coherent(&adapter->pdev->dev, > - dma_mem->size, dma_mem->va, > - dma_mem->pa); > + dma_free_coherent(&adapter->pdev->dev, > + dma_mem->size, dma_mem->va, > + dma_mem->pa); > break; > } > =20 --------------W1T0PlmnfegAt0GGE0hxfVQ5-- --------------s8YC5xAGgKNEZTivc4OKXvDr Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- wnsEABYIACMWIQQgQFSp1zOQVirsQx5qll0+bw8o6AUCaNsN9AUDAAAAAAAKCRBqll0+bw8o6GkE AP0ZlgGN74jJOJAmmr4x5EtzHYc4zwSU4b1Hbv88RyqhogD/dfoMHJRPFa+sCGgevEOis5F6jPst 6yFF/vTq2CLlPgY= =ZVph -----END PGP SIGNATURE----- --------------s8YC5xAGgKNEZTivc4OKXvDr--