This is a note to let you know that I've just added the patch titled
usb: dwc2/gadget: delay enabling irq once hardware is configured properly
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-dwc2-gadget-delay-enabling-irq-once-hardware-is-configured-properly.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From eb3c56c5ccdd252940cb0ec0541fcdc94894bd8d Mon Sep 17 00:00:00 2001
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Date: Tue, 9 Sep 2014 10:44:12 +0200
Subject: usb: dwc2/gadget: delay enabling irq once hardware is configured properly
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
commit eb3c56c5ccdd252940cb0ec0541fcdc94894bd8d upstream.
This patch fixes kernel panic/interrupt storm/etc issues if bootloader
left s3c-hsotg module in enabled state. Now interrupt handler is enabled
only after proper configuration of hardware registers.
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/dwc2/gadget.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3444,13 +3444,6 @@ static int s3c_hsotg_probe(struct platfo
hsotg->irq = ret;
- ret = devm_request_irq(&pdev->dev, hsotg->irq, s3c_hsotg_irq, 0,
- dev_name(dev), hsotg);
- if (ret < 0) {
- dev_err(dev, "cannot claim IRQ\n");
- goto err_clk;
- }
-
dev_info(dev, "regs %p, irq %d\n", hsotg->regs, hsotg->irq);
hsotg->gadget.max_speed = USB_SPEED_HIGH;
@@ -3498,6 +3491,17 @@ static int s3c_hsotg_probe(struct platfo
s3c_hsotg_init(hsotg);
s3c_hsotg_hw_cfg(hsotg);
+ ret = devm_request_irq(&pdev->dev, hsotg->irq, s3c_hsotg_irq, 0,
+ dev_name(dev), hsotg);
+ if (ret < 0) {
+ s3c_hsotg_phy_disable(hsotg);
+ clk_disable_unprepare(hsotg->clk);
+ regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
+ hsotg->supplies);
+ dev_err(dev, "cannot claim IRQ\n");
+ goto err_clk;
+ }
+
/* hsotg->num_of_eps holds number of EPs other than ep0 */
if (hsotg->num_of_eps == 0) {
Patches currently in stable-queue which might be from m.szyprowski@xxxxxxxxxxx are
queue-3.16/usb-dwc2-gadget-fix-phy-disable-sequence.patch
queue-3.16/usb-dwc2-gadget-delay-enabling-irq-once-hardware-is-configured-properly.patch
queue-3.16/usb-dwc2-gadget-break-infinite-loop-in-endpoint-disable-code.patch
queue-3.16/usb-dwc2-gadget-do-not-call-disconnect-method-in-pullup.patch
queue-3.16/usb-dwc2-gadget-fix-phy-initialization-sequence.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html