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| author | Artur Petrosyan <Arthur.Petrosyan@synopsys.com> | 2021-03-26 13:25:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-07 15:47:44 +0300 |
| commit | fd5ce87aee48e165840c99c0d07b2c3b0b8f091d (patch) | |
| tree | 6166723a08f3fa0c387bca7189eadc3ae689f509 /drivers | |
| parent | 85e1752ae0edec6b742d6d9545c0d5355d69011e (diff) | |
| download | linux-fd5ce87aee48e165840c99c0d07b2c3b0b8f091d.tar.xz | |
usb: dwc2: Prevent core suspend when port connection flag is 0
commit 93f672804bf2d7a49ef3fd96827ea6290ca1841e upstream.
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')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 2a365522217e..258056c82206 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; /* |