evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

USB: EHCI: reorganize ehci_iaa_watchdog()

Browse source 
This patch (as1635) rearranges the control-flow logic in
ehci_iaa_watchdog() slightly to agree better with the comments.  It
also changes a verbose-debug message to a regular debug message.
Expiration of the IAA watchdog is an unusual event and can lead to
problems; we need to know about it if it happens during debugging.  It
should not be necessary to set a "verbose" compilation option.

No behavioral changes other than the debug message.  Lots of apparent
changes to the source text, though, because the indentation level was
decreased.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alan Stern 2013-03-18 12:05:19 -04:00 • committed by Greg Kroah-Hartman
parent 4dd405a4b0
commit 60fd4aa742
1 changed files with 24 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
drivers/usb/host/ehci-timer.c
View file

@ -295,8 +295,7 @@ static void end_free_itds(struct ehci_hcd *ehci)
/* Handle lost (or very late) IAA interrupts */ /* Handle lost (or very late) IAA interrupts */
static void ehci_iaa_watchdog(struct ehci_hcd *ehci) static void ehci_iaa_watchdog(struct ehci_hcd *ehci)
{ {
if (ehci->rh_state != EHCI_RH_RUNNING) u32 cmd, status;
return;
/* /*
* Lost IAA irqs wedge things badly; seen first with a vt8235. * Lost IAA irqs wedge things badly; seen first with a vt8235.
@ -304,8 +303,8 @@ static void ehci_iaa_watchdog(struct ehci_hcd *ehci)
* (a) SMP races against real IAA firing and retriggering, and * (a) SMP races against real IAA firing and retriggering, and
* (b) clean HC shutdown, when IAA watchdog was pending. * (b) clean HC shutdown, when IAA watchdog was pending.
*/ */
if (ehci->async_iaa) { if (!ehci->async_iaa || ehci->rh_state != EHCI_RH_RUNNING)
u32 cmd, status; return;
/* If we get here, IAA is *REALLY* late. It's barely /* If we get here, IAA is *REALLY* late. It's barely
* conceivable that the system is so busy that CMD_IAAD * conceivable that the system is so busy that CMD_IAAD
@ -328,11 +327,9 @@ static void ehci_iaa_watchdog(struct ehci_hcd *ehci)
ehci_writel(ehci, STS_IAA, &ehci->regs->status); ehci_writel(ehci, STS_IAA, &ehci->regs->status);
} }
ehci_vdbg(ehci, "IAA watchdog: status %x cmd %x\n", ehci_dbg(ehci, "IAA watchdog: status %x cmd %x\n", status, cmd);
status, cmd);
end_unlink_async(ehci); end_unlink_async(ehci);
} }
}
/* Enable the I/O watchdog, if appropriate */ /* Enable the I/O watchdog, if appropriate */