From 46571889ec435f1bf29d9094f062948b26630723 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 25 Feb 2015 14:30:55 -0600 Subject: [PATCH] usb: musb: core: remove unnecessary reg access from resume IRQ when musb is operating as host and a remote wakeup fires up, a resume interrupt will be raised. At that point SUSPENDM bit is automatically cleared and RESUME bit is automatically set. Remove those two from IRQ handler. Tested-by: Bin Liu Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_core.c | 15 --------------- 1 file changed, 15 deletions(-) diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index b5dfe83..3fb7d6e 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -538,27 +538,12 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb, usb_otg_state_string(musb->xceiv->otg->state)); if (devctl & MUSB_DEVCTL_HM) { - void __iomem *mbase = musb->mregs; - u8 power; - switch (musb->xceiv->otg->state) { case OTG_STATE_A_SUSPEND: /* remote wakeup? later, GetPortStatus * will stop RESUME signaling */ - power = musb_readb(musb->mregs, MUSB_POWER); - if (power & MUSB_POWER_SUSPENDM) { - /* spurious */ - musb->int_usb &= ~MUSB_INTR_SUSPEND; - dev_dbg(musb->controller, "Spurious SUSPENDM\n"); - break; - } - - power &= ~MUSB_POWER_SUSPENDM; - musb_writeb(mbase, MUSB_POWER, - power | MUSB_POWER_RESUME); - musb->port1_status |= (USB_PORT_STAT_C_SUSPEND << 16) | MUSB_PORT_STAT_RESUME; -- 2.7.4