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Fri, 25 Sep 2026 18:06:03 +0000 (GMT) Received: from localhost.localdomain (unknown [9.67.6.174]) by smtpav01.wdc07v.mail.ibm.com (Postfix) with ESMTP; Fri, 25 Sep 2026 18:06:03 +0000 (GMT) From: Mingming Cao To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, horms@kernel.org, edumazet@google.com, pabeni@redhat.com, andrew+netdev@lunn.ch, nnac123@linux.ibm.com, maddy@linux.ibm.com, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, davemarq@linux.ibm.com, bjking1@linux.ibm.com, Mingming Cao , shaik.abdulla1@ibm.com, stable@vger.kernel.org Subject: [PATCH net 1/2] ibmveth: h_free logical LAN on open-fail after register Date: Fri, 25 Sep 2026 11:05:29 -0700 Message-Id: <7a56fbfb9e0674f011f4e310fbd7dfd8e67c30aa.1790357373.git.mmc@linux.ibm.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: Mg0Z59Vwzm7Hzb2OoMxJYJLsDltQwhk6 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI1MDA3MiBTYWx0ZWRfX6TdMairycIER xWW0ISja2//HVLFX4euVaJjOjpAbvoyAI+1uRGEMhBJZGcfwJVew8cVQtoWdEC8IhG6Om7C5f5s DG1XYnyqAGAn91XULB41/DRZeshom9o= X-Authority-Analysis: v=2.4 cv=FLiOVOos c=1 sm=1 tr=0 ts=6ab6b812 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=YwJyo6ll96k2yfcBO2wA:9 X-Proofpoint-GUID: HeVpEW0a7N1XleYYX_tLGJUGRYZfPjXs X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI1MDA3MiBTYWx0ZWRfX3t1pb+K2xYpT g8brkhKqOW3n06EAqFdD8Iscg/hbneJy43aELnpTC/EksGB+DN0gcayn1IouEba9LWvxpNgsRO0 yagWlzWmaZK2MQtvbSMCEWaM9JrdB4wUekWPeTYceyYSvgSWizO0nBEvyy7WRx0dw2E7Uyr6hng 3im7AOxNNd6r6ULMCMF/CaCJ+JT1NAFTkIBpD5lDtd+L7y5a60U68MzECRU4coFwmd7gBr2PLih pgxehUIgjzgZnDGWfsBtXEzjw/I0h853YgH8L6KLoB59LAB5fUjZJIg8fsU8w4oby6oeweAyVsd +HQItrtYMu0JhnQEnivNCtQjXBKOWuaATpvVdBs8TvuWf20qzlNP6zC/gPBQNxAz4uSkxnrXfpI IPP75csCTdZKXUflJ5RoynI/GbwjJqD1ovIYWfzeif+hRYfJ4hDXyiynatZzXhUa7WXq3Xsva5v T/u/N3cozZfmaLhHZXA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-25_03,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 phishscore=0 spamscore=0 clxscore=1011 suspectscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609250072 ibmveth_open() registers the logical LAN, then allocates the RX buffer pools. A pool failure jumps to out_free_buffer_pools without h_free_logical_lan(), so PHYP still owns the buffer-list page when it is unmapped. request_irq() failure already issued the hypercall before taking the same label. Move that h_free to the shared post-register unwind so both paths deregister before the buffer list is unmapped. Fixes: d43732ce021f ("ibmveth: properly unwind on init errors") Cc: stable@vger.kernel.org Signed-off-by: Mingming Cao --- drivers/net/ethernet/ibm/ibmveth.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c index 73e051d26b9d..3e44f6b714d4 100644 --- a/drivers/net/ethernet/ibm/ibmveth.c +++ b/drivers/net/ethernet/ibm/ibmveth.c @@ -718,10 +718,6 @@ static int ibmveth_open(struct net_device *netdev) if (rc != 0) { netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", netdev->irq, rc); - do { - lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); - } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); - goto out_free_buffer_pools; } @@ -737,6 +733,9 @@ static int ibmveth_open(struct net_device *netdev) return 0; out_free_buffer_pools: + do { + lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); + } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); while (--i >= 0) { if (adapter->rx_buff_pool[i].active) ibmveth_free_buffer_pool(adapter, -- 2.50.1 (Apple Git-155)