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authorArtur Petrosyan <Arthur.Petrosyan@synopsys.com>2021-03-26 11:25:09 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-03-26 14:51:34 +0100
commit93f672804bf2d7a49ef3fd96827ea6290ca1841e (patch)
treed182c0ae7e998095c428e57af282e7210c09a51a /drivers/usb
parentusb: dwc2: Fix HPRT0.PrtSusp bit setting for HiKey 960 board. (diff)
downloadlinux-93f672804bf2d7a49ef3fd96827ea6290ca1841e.tar.xz
linux-93f672804bf2d7a49ef3fd96827ea6290ca1841e.zip
usb: dwc2: Prevent core suspend when port connection flag is 0
In host mode port connection status flag is "0" when loading the driver. After loading the driver system asserts suspend which is handled by "_dwc2_hcd_suspend()" function. Before the system suspend the port connection status is "0". As result need to check the "port_connect_status" if it is "0", then skipping entering to suspend. Cc: <stable@vger.kernel.org> # 5.2 Fixes: 6f6d70597c15 ("usb: dwc2: bus suspend/resume for hosts with DWC2_POWER_DOWN_PARAM_NONE") Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> Link: https://lore.kernel.org/r/20210326102510.BDEDEA005D@mailhost.synopsys.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/dwc2/hcd.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 40e5655921bf..1a9789ec5847 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -4322,7 +4322,8 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
if (hsotg->op_state == OTG_STATE_B_PERIPHERAL)
goto unlock;
- if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL)
+ if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL ||
+ hsotg->flags.b.port_connect_status == 0)
goto skip_power_saving;
/*