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authorDavid Brownell <david-b@pacbell.net>2008-03-05 23:37:52 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2008-04-24 21:16:40 -0700
commitd1b1842c393cf322712b669ec887397b89ed2312 (patch)
tree890cefa2129aa7fa54424ad259e24cf4fca00694 /drivers/usb/host
parent22552b286b44b8988e08fb74379507a9b32521b0 (diff)
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 <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/ehci-hcd.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 40f7391bf2a..8c3e860bfce 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;
}