From 1084514ca9aa5b3fcc485b378b92b632918237f4 Mon Sep 17 00:00:00 2001 From: Vincent Palomares Date: Tue, 27 Jul 2021 18:27:43 -0700 Subject: [PATCH] scsi: ufs: Allow async suspend/resume callbacks Allow UFS suspend/resume callbacks to run in parallel with other suspend/resume callbacks. This can recoup dozens of milliseconds on the resume path if UFS hardware needs to be powered back on. Suspending and resuming asynchronously is safe to do so long as the driver callbacks only depend on resources made available by either a) parent devices or b) devices explicitly marked as suppliers with device_link_add. Link: https://lore.kernel.org/r/20210728012743.1063928-1-paillon@google.com Cc: Bjorn Helgaas Cc: Jaegeuk Kim Cc: Bart Van Assche Cc: Adrian Hunter Cc: Stanley Chu Cc: Can Guo Cc: Asutosh Das Cc: Avri Altman Cc: Martin K. Petersen Reviewed-by: Bart Van Assche Signed-off-by: Vincent Palomares Signed-off-by: Martin K. Petersen --- drivers/scsi/ufs/ufshcd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 064a44e628d6..05495c34a2b7 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -9626,6 +9626,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) async_schedule(ufshcd_async_scan, hba); ufs_sysfs_add_nodes(hba->dev); + device_enable_async_suspend(dev); return 0; free_tmf_queue: