From: Andreas Kemnade Date: Tue, 20 Feb 2018 13:30:10 +0000 (-0600) Subject: usb: musb: fix enumeration after resume X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=43de32cdf0f4f73519e2df12fb93adc24f9746cb;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git usb: musb: fix enumeration after resume commit 17539f2f4f0b7fa906b508765c8ada07a1e45f52 upstream. On dm3730 there are enumeration problems after resume. Investigation led to the cause that the MUSB_POWER_SOFTCONN bit is not set. If it was set before suspend (because it was enabled via musb_pullup()), it is set in musb_restore_context() so the pullup is enabled. But then musb_start() is called which overwrites MUSB_POWER and therefore disables MUSB_POWER_SOFTCONN, so no pullup is enabled and the device is not enumerated. So let's do a subset of what musb_start() does in the same way as musb_suspend() does it. Platform-specific stuff it still called as there might be some phy-related stuff which needs to be enabled. Also interrupts are enabled, as it was the original idea of calling musb_start() in musb_resume() according to Commit 6fc6f4b87cb3 ("usb: musb: Disable interrupts on suspend, enable them on resume") Signed-off-by: Andreas Kemnade Tested-by: Tony Lindgren Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index ff5a1a8989d5..4f0d937bf0e5 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -2733,7 +2733,8 @@ static int musb_resume(struct device *dev) if ((devctl & mask) != (musb->context.devctl & mask)) musb->port1_status = 0; - musb_start(musb); + musb_enable_interrupts(musb); + musb_platform_enable(musb); spin_lock_irqsave(&musb->lock, flags); error = musb_run_resume_work(musb);