From: Yihang Li Date: Sat, 25 Apr 2026 08:20:56 +0000 (+0800) Subject: scsi: hisi_sas: Add slave_destroy interface for v3 hw X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=67b85a88265df19f049241d8c00571a5408f4eeb;p=thirdparty%2Fkernel%2Flinux.git scsi: hisi_sas: Add slave_destroy interface for v3 hw WARNING is triggered when executing link reset of remote PHY and rmmod SAS driver simultaneously. Following is the WARNING log: WARNING: CPU: 61 PID: 21818 at drivers/base/core.c:1347 __device_links_no_driver+0xb4/0xc0 Call trace: __device_links_no_driver+0xb4/0xc0 device_links_driver_cleanup+0xb0/0xfc __device_release_driver+0x198/0x23c device_release_driver+0x38/0x50 bus_remove_device+0x130/0x140 device_del+0x184/0x434 __scsi_remove_device+0x118/0x150 scsi_remove_target+0x1bc/0x240 sas_rphy_remove+0x90/0x94 sas_rphy_delete+0x24/0x3c sas_destruct_devices+0x64/0xa0 [libsas] sas_revalidate_domain+0xe4/0x150 [libsas] process_one_work+0x1e0/0x46c worker_thread+0x15c/0x464 kthread+0x160/0x170 ret_from_fork+0x10/0x20 ---[ end trace 71e059eb58f85d4a ]--- During SAS phy up, link->status is set to DL_STATE_AVAILABLE in device_links_driver_bound, then this setting influences __device_links_no_driver() before driver rmmod and caused WARNING. Add the slave_destroy interface to make sure link is removed after flush workque. Fixes: 16fd4a7c5917 ("scsi: hisi_sas: Add device link between SCSI devices and hisi_hba") Signed-off-by: Yihang Li Link: https://patch.msgid.link/20260425082056.2749910-1-liyihang9@huawei.com Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index fda07b193137a..c7430f7c40484 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -2977,7 +2977,7 @@ static int sdev_configure_v3_hw(struct scsi_device *sdev, return 0; if (!device_link_add(&sdev->sdev_gendev, dev, - DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE)) { + DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE)) { if (pm_runtime_enabled(dev)) { dev_info(dev, "add device link failed, disable runtime PM for the host\n"); pm_runtime_disable(dev); @@ -2987,6 +2987,15 @@ static int sdev_configure_v3_hw(struct scsi_device *sdev, return 0; } +static void hisi_sas_sdev_destroy(struct scsi_device *sdev) +{ + struct Scsi_Host *shost = dev_to_shost(&sdev->sdev_gendev); + struct hisi_hba *hisi_hba = shost_priv(shost); + struct device *dev = hisi_hba->dev; + + device_link_remove(&sdev->sdev_gendev, dev); +} + static struct attribute *host_v3_hw_attrs[] = { &dev_attr_phy_event_threshold.attr, &dev_attr_intr_conv_v3_hw.attr, @@ -3401,6 +3410,7 @@ static const struct scsi_host_template sht_v3_hw = { .sg_tablesize = HISI_SAS_SGE_PAGE_CNT, .sg_prot_tablesize = HISI_SAS_SGE_PAGE_CNT, .sdev_init = hisi_sas_sdev_init, + .sdev_destroy = hisi_sas_sdev_destroy, .shost_groups = host_v3_hw_groups, .sdev_groups = sdev_groups_v3_hw, .tag_alloc_policy_rr = true,