From 969bb5bad3163204bb07dab385397e8ceab70a53 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sun, 10 May 2015 14:10:23 +0200 Subject: [PATCH] usb: ohci: Remove unnecessary delays from hc_start and power power-on paths The usb spec says that we must wait a minimum amount of time after port power on (exact time is in the hub descriptor), this is something which we must not only do for root ports but also for external hub ports, which is why the common usb_hub code already waits a full second after powering up ports. Having a separate wait for just the root hub in the ohci-hcd code only leads to doing the waiting twice for the root ports, so drop the wait from the ohci-hcd code. Signed-off-by: Hans de Goede --- drivers/usb/host/ohci-hcd.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index da500c0aa1..dc0892f6fd 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1338,7 +1338,6 @@ pkt_print(ohci, NULL, dev, pipe, buffer, transfer_len, OK(0); case (RH_PORT_POWER): WR_RH_PORTSTAT(RH_PS_PPS); - mdelay(100); OK(0); case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/ if (RD_RH_PORTSTAT & RH_PS_CCS) @@ -1737,9 +1736,6 @@ static int hc_start(ohci_t *ohci) ohci_writel(RH_HS_LPSC, &ohci->regs->roothub.status); #endif /* OHCI_USE_NPS */ - /* POTPGT delay is bits 24-31, in 2 ms units. */ - mdelay((roothub_a(ohci) >> 23) & 0x1fe); - /* connect the virtual root hub */ ohci->rh.devnum = 0; -- 2.25.1