scsi: ufshcd: Fix missing destroy_workqueue()

Add the missing destroy_workqueue() before return from ufshcd_init in the
error handling case as well as in ufshcd_remove.

Link: https://lore.kernel.org/r/20201110074223.41280-1-miaoqinglang@huawei.com
Fixes: 4db7a23 ("scsi: ufs: Fix concurrency of error handler and other error recovery paths")
Suggested-by: Avri Altman <Avri.Altman@wdc.com>
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: Qinglang Miao

drivers/scsi/ufs/ufshcd.c

@@ -8928,6 +8928,7 @@ void ufshcd_remove(struct ufs_hba *hba)
 	blk_mq_free_tag_set(&hba->tmf_tag_set);
 	blk_cleanup_queue(hba->cmd_queue);
 	scsi_remove_host(hba->host);
+	destroy_workqueue(hba->eh_wq);
 	/* disable interrupts */
 	ufshcd_disable_intr(hba, hba->intr_mask);
 	ufshcd_hba_stop(hba);
@@ -9228,6 +9229,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 exit_gating:
 	ufshcd_exit_clk_scaling(hba);
 	ufshcd_exit_clk_gating(hba);
+	destroy_workqueue(hba->eh_wq);
 out_disable:
 	hba->is_irq_enabled = false;
 	ufshcd_hba_exit(hba);