This is a note to let you know that I've just added the patch titled
usb: dwc2/gadget: fix phy disable sequence
to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From 0655314be0d9c54ad5f63500219485c6a9d9e5e2 Mon Sep 17 00:00:00 2001
From: Kamil Debski <k.debski@xxxxxxxxxxx>
Date: Tue, 9 Sep 2014 10:44:08 +0200
Subject: usb: dwc2/gadget: fix phy disable sequence
When the driver is removed s3c_hsotg_phy_disable is called three times
instead of once. This results in decreasing of the phy reference counter
below zero and thus consecutive inserts of the module fails.
This patch removes calls to s3c_hsotg_phy_disable from s3c_hsotg_remove
and s3c_hsotg_udc_stop.
s3c_hsotg_udc_stop is called from udc-core.c only after
usb_gadget_disconnect, which in turn calls s3c_hsotg_pullup, which
already calls s3c_hsotg_phy_disable.
s3c_hsotg_remove must be called only after udc_stop, so there is no
point in disabling phy once again there.
Signed-off-by: Kamil Debski <k.debski@xxxxxxxxxxx>
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx> # 3.16
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/dwc2/gadget.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 7c9618e916e2..505d56ed7167 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2897,8 +2897,6 @@ static int s3c_hsotg_udc_stop(struct usb_gadget *gadget,
spin_lock_irqsave(&hsotg->lock, flags);
- s3c_hsotg_phy_disable(hsotg);
-
if (!driver)
hsotg->driver = NULL;
@@ -3582,7 +3580,6 @@ static int s3c_hsotg_remove(struct platform_device *pdev)
usb_gadget_unregister_driver(hsotg->driver);
}
- s3c_hsotg_phy_disable(hsotg);
if (hsotg->phy)
phy_exit(hsotg->phy);
clk_disable_unprepare(hsotg->clk);
--
2.1.0
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