From: David Brownell Date: Thu, 6 Mar 2008 07:37:52 +0000 (-0800) Subject: USB: ehci: remove obsolete workaround for bogus IRQs X-Git-Tag: upstream/snapshot3+hdmi~26226^2~74 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d1b1842c393cf322712b669ec887397b89ed2312;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git USB: ehci: remove obsolete workaround for bogus IRQs It was pointed out that we found and fixed the cause of the "bogus" fatal IRQ reports some time ago ... this patch removes the code which was working around that bug ("status" got clobbered), and a comment which needlessly confused folk reading this code. This also includes a minor cleanup to the code which fixed that bug. Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 40f7391..8c3e860 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -686,6 +686,8 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd) /* remote wakeup [4.3.1] */ if (status & STS_PCD) { unsigned i = HCS_N_PORTS (ehci->hcs_params); + + /* kick root hub later */ pcd_status = status; /* resume root hub? */ @@ -714,8 +716,6 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd) /* PCI errors [4.15.2.4] */ if (unlikely ((status & STS_FATAL) != 0)) { - /* bogus "fatal" IRQs appear on some chips... why? */ - status = ehci_readl(ehci, &ehci->regs->status); dbg_cmd (ehci, "fatal", ehci_readl(ehci, &ehci->regs->command)); dbg_status (ehci, "fatal", status); @@ -734,7 +734,7 @@ dead: if (bh) ehci_work (ehci); spin_unlock (&ehci->lock); - if (pcd_status & STS_PCD) + if (pcd_status) usb_hcd_poll_rh_status(hcd); return IRQ_HANDLED; }