5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yihang Li liyihang9@huawei.com
[ Upstream commit 7ea3e7763c50b20a8bd25cf524ea0c6463de69be ]
We obtain the semaphore and set HISI_SAS_RESETTING_BIT in hisi_sas_reset_prepare_v3_hw(), block the scsi host and set HISI_SAS_REJECT_CMD_BIT in hisi_sas_controller_reset_prepare(), released them in hisi_sas_controller_reset_done(). However, if the HW reset failure in FLR results in early return, the semaphore and flag bits will not be release.
Rollback some operations including clearing flags / releasing semaphore when FLR is failed.
Fixes: e5ea48014adc ("scsi: hisi_sas: Implement handlers of PCIe FLR for v3 hw") Signed-off-by: Yihang Li liyihang9@huawei.com Signed-off-by: Xiang Chen chenxiang66@hisilicon.com Link: https://lore.kernel.org/r/1702525516-51258-5-git-send-email-chenxiang66@hisi... Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index 88af529ab100..4505310c0c3c 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -4948,6 +4948,7 @@ static void hisi_sas_reset_done_v3_hw(struct pci_dev *pdev) { struct sas_ha_struct *sha = pci_get_drvdata(pdev); struct hisi_hba *hisi_hba = sha->lldd_ha; + struct Scsi_Host *shost = hisi_hba->shost; struct device *dev = hisi_hba->dev; int rc;
@@ -4956,6 +4957,10 @@ static void hisi_sas_reset_done_v3_hw(struct pci_dev *pdev) rc = hw_init_v3_hw(hisi_hba); if (rc) { dev_err(dev, "FLR: hw init failed rc=%d\n", rc); + clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); + scsi_unblock_requests(shost); + clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags); + up(&hisi_hba->sem); return; }