From: Robert Baldyga <r.baldyga@samsung.com>
To: balbi@ti.com
Cc: paulz@synopsys.com, gregkh@linuxfoundation.org,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
m.szyprowski@samsung.com, andrzej.p@samsung.com,
Robert Baldyga <r.baldyga@samsung.com>
Subject: [PATCH v2 09/12] usb: dwc2/gadget: delay enabling irq once hardware is configured properly
Date: Wed, 16 Jul 2014 12:22:27 +0200 [thread overview]
Message-ID: <1405506150-16185-10-git-send-email-r.baldyga@samsung.com> (raw)
In-Reply-To: <1405506150-16185-1-git-send-email-r.baldyga@samsung.com>
From: Marek Szyprowski <m.szyprowski@samsung.com>
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@samsung.com>
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
---
drivers/usb/dwc2/gadget.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index def4900..3435711 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3459,13 +3459,6 @@ static int s3c_hsotg_probe(struct platform_device *pdev)
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;
@@ -3503,6 +3496,17 @@ static int s3c_hsotg_probe(struct platform_device *pdev)
s3c_hsotg_hw_cfg(hsotg);
s3c_hsotg_init(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) {
--
1.9.1
next prev parent reply other threads:[~2014-07-16 10:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-16 10:22 [PATCH v2 00/12] usb: dwc2/gadget: fix series Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 01/12] usb: dwc2/gadget: fix phy disable sequence Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 02/12] usb: dwc2/gadget: fix phy initialization sequence Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 03/12] usb: dwc2/gadget: move phy bus legth initialization Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 04/12] usb: dwc2/gadget: Fix comment text Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 05/12] usb: dwc2/gadget: hide some not really needed debug messages Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 06/12] usb: dwc2/gadget: ensure that all fifos have correct memory buffers Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 07/12] usb: dwc2/gadget: break infinite loop in endpoint disable code Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 08/12] usb: dwc2/gadget: do not call disconnect method in pullup Robert Baldyga
2014-07-16 10:22 ` Robert Baldyga [this message]
2014-07-16 10:22 ` [PATCH v2 10/12] usb: dwc2/gadget: assign TX FIFO dynamically Robert Baldyga
2014-07-16 19:58 ` Paul Zimmerman
2014-07-16 20:22 ` Paul Zimmerman
2014-07-18 11:07 ` Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 11/12] usb: dwc2/gadget: disable clock when it's not needed Robert Baldyga
2014-07-16 10:22 ` [PATCH v2 12/12] usb: dwc2/gadget: avoid disabling ep0 Robert Baldyga
2014-07-17 0:27 ` [PATCH v2 00/12] usb: dwc2/gadget: fix series Paul Zimmerman
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