Phuong Nguyen d9140a0da4 dmaengine: usb-dmac: Make DMAC system sleep callbacks explicit ... This commit fixes the issue that USB-DMAC hangs silently after system resumes on R-Car Gen3 hence renesas_usbhs will not work correctly when using USB-DMAC for bulk transfer e.g. ethernet or serial gadgets. The issue can be reproduced by these steps: 1. modprobe g_serial 2. Suspend and resume system. 3. connect a usb cable to host side 4. Transfer data from Host to Target 5. cat /dev/ttyGS0 (Target side) 6. echo "test" > /dev/ttyACM0 (Host side) The 'cat' will not result anything. However, system still can work normally. Currently, USB-DMAC driver does not have system sleep callbacks hence this driver relies on the PM core to force runtime suspend/resume to suspend and reinitialize USB-DMAC during system resume. After the commit 17218e0092 ("PM / genpd: Stop/start devices without pm_runtime_force_suspend/resume()"), PM core will not force runtime suspend/resume anymore so this issue happens. To solve this, make system suspend resume explicit by using pm_runtime_force_{suspend,resume}() as the system sleep callbacks. SET_NOIRQ_SYSTEM_SLEEP_PM_OPS() is used to make sure USB-DMAC suspended after and initialized before renesas_usbhs." Signed-off-by: Phuong Nguyen <phuong.nguyen.xw@renesas.com> Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com> Cc: <stable@vger.kernel.org> # v4.16+ [shimoda: revise the commit log and add Cc tag] Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>		2019-01-20 16:29:52 +05:30
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Kconfig	dmaengine: sh: Remove R-Mobile APE6 support	2018-12-05 13:01:54 +05:30
Makefile	dmaengine: sh: Remove R-Mobile APE6 support	2018-12-05 13:01:54 +05:30
rcar-dmac.c	dmaengine: sh: rcar-dmac: Use device_iommu_mapped()	2018-12-17 12:47:49 +01:00
shdma-arm.h	dmaengine: use SPDX identifier for Renesas drivers	2018-08-29 21:58:49 +05:30
shdma-base.c	dmaengine: use SPDX identifier for Renesas drivers	2018-08-29 21:58:49 +05:30
shdma-of.c	dmaengine: use SPDX identifier for Renesas drivers	2018-08-29 21:58:49 +05:30
shdma.h	dmaengine: sh: Remove R-Mobile APE6 support	2018-12-05 13:01:54 +05:30
shdmac.c	dmaengine: sh: Remove R-Mobile APE6 support	2018-12-05 13:01:54 +05:30
sudmac.c	dmaengine: use SPDX identifier for Renesas drivers	2018-08-29 21:58:49 +05:30
usb-dmac.c	dmaengine: usb-dmac: Make DMAC system sleep callbacks explicit	2019-01-20 16:29:52 +05:30