Suspend scenario in case of OHCI was not properly
handled in ochi_suspend()routine. Alan Stern
suggested, properly handle OHCI suspend scenario.
This does generic proper handling of suspend
scenario to all OHCI SOC.
V1->V2:
- No change.
Due to build failure on ep93xx reverted this patch. This patch is
needed as Alan mentioned, it is having common ohci suspend features
w/o this following patches(still in usb-next) are not useful.
Commit id "10abfa13"[PATCH 7/11] Properly handle ohci-omap suspend.
Commit id "39dbd7df"[PATCH 8/11] Properly handle ohci-platform suspend.
Commit id "4ceaa893"[PATCH 9/11] Properly handle ohci-pxa suspend.
Commit id "f3c60599"[PATCH 10/11] Properly handle ohci-sm501 suspend.
V2->V3 :
- No changes.
As a build failure on ep93xx patch, reverted this patch(reveart
commit id 476e4b). Rewrote this patch on top of latest Greg usb-next
branch. This patch not gives any build error. patch is required for
proper suspending as Alan mentioned. It is having common ohci suspend
features w/o this following patches(still in usb-next) are not useful.
Commit id "10abfa13"[PATCH 7/11] Properly handle ohci-omap suspend.
Commit id "39dbd7df"[PATCH 8/11] Properly handle ohci-platform suspend.
Commit id "4ceaa893"[PATCH 9/11] Properly handle ohci-pxa suspend.
Commit id "f3c60599"[PATCH 10/11] Properly handle ohci-sm501 suspend.
Initially when I wrote this patch I was working in Linaro, now I am not
part of Linaro that is why Linaro id is bouncing. Sending this patch
from personal mail id.
Signed-off-by: Manjunath Goudar <csmanjuvi...@gmail.com>
Cc: Alan Stern <st...@rowland.harvard.edu>
Cc: Greg KH <g...@kroah.com>
Cc: linux-usb@vger.kernel.org
---
drivers/usb/host/ohci-hcd.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 8ada13f..310bcfe 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1036,6 +1036,7 @@ int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
unsigned long flags;
+ int rc = 0;
/* Disable irq emission and mark HW unaccessible. Use
* the spinlock to properly synchronize with possible pending
@@ -1048,7 +1049,13 @@ int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
spin_unlock_irqrestore (&ohci->lock, flags);
- return 0;
+ synchronize_irq(hcd->irq);
+
+ if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
+ ohci_resume(hcd, false);
+ rc = -EBUSY;
+ }
+ return rc;
}
EXPORT_SYMBOL_GPL(ohci_suspend);
--
1.7.9.5
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