linux-kernel - [PATCH AUTOSEL 4.19 068/123] USB: omap_udc: use devm_request

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Date:   Wed,  5 Dec 2018 04:35:00 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     stable@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Aaro Koskinen <aaro.koskinen@....fi>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Sasha Levin <sashal@...nel.org>, linux-usb@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 068/123] USB: omap_udc: use devm_request_irq()

From: Aaro Koskinen <aaro.koskinen@....fi>

[ Upstream commit 286afdde1640d8ea8916a0f05e811441fbbf4b9d ]

The current code fails to release the third irq on the error path
(observed by reading the code), and we get also multiple WARNs with
failing gadget drivers due to duplicate IRQ releases. Fix by using
devm_request_irq().

Signed-off-by: Aaro Koskinen <aaro.koskinen@....fi>
Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/gadget/udc/omap_udc.c | 37 +++++++++----------------------
 1 file changed, 10 insertions(+), 27 deletions(-)

diff --git a/drivers/usb/gadget/udc/omap_udc.c b/drivers/usb/gadget/udc/omap_udc.c
index 3a16431da321..1c77218c82af 100644
--- a/drivers/usb/gadget/udc/omap_udc.c
+++ b/drivers/usb/gadget/udc/omap_udc.c
@@ -2867,8 +2867,8 @@ static int omap_udc_probe(struct platform_device *pdev)
 		udc->clr_halt = UDC_RESET_EP;
 
 	/* USB general purpose IRQ:  ep0, state changes, dma, etc */
-	status = request_irq(pdev->resource[1].start, omap_udc_irq,
-			0, driver_name, udc);
+	status = devm_request_irq(&pdev->dev, pdev->resource[1].start,
+				  omap_udc_irq, 0, driver_name, udc);
 	if (status != 0) {
 		ERR("can't get irq %d, err %d\n",
 			(int) pdev->resource[1].start, status);
@@ -2876,20 +2876,20 @@ static int omap_udc_probe(struct platform_device *pdev)
 	}
 
 	/* USB "non-iso" IRQ (PIO for all but ep0) */
-	status = request_irq(pdev->resource[2].start, omap_udc_pio_irq,
-			0, "omap_udc pio", udc);
+	status = devm_request_irq(&pdev->dev, pdev->resource[2].start,
+				  omap_udc_pio_irq, 0, "omap_udc pio", udc);
 	if (status != 0) {
 		ERR("can't get irq %d, err %d\n",
 			(int) pdev->resource[2].start, status);
-		goto cleanup2;
+		goto cleanup1;
 	}
 #ifdef	USE_ISO
-	status = request_irq(pdev->resource[3].start, omap_udc_iso_irq,
-			0, "omap_udc iso", udc);
+	status = devm_request_irq(&pdev->dev, pdev->resource[3].start,
+				  omap_udc_iso_irq, 0, "omap_udc iso", udc);
 	if (status != 0) {
 		ERR("can't get irq %d, err %d\n",
 			(int) pdev->resource[3].start, status);
-		goto cleanup3;
+		goto cleanup1;
 	}
 #endif
 	if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
@@ -2902,22 +2902,11 @@ static int omap_udc_probe(struct platform_device *pdev)
 	create_proc_file();
 	status = usb_add_gadget_udc_release(&pdev->dev, &udc->gadget,
 			omap_udc_release);
-	if (status)
-		goto cleanup4;
-
-	return 0;
+	if (!status)
+		return 0;
 
-cleanup4:
 	remove_proc_file();
 
-#ifdef	USE_ISO
-cleanup3:
-	free_irq(pdev->resource[2].start, udc);
-#endif
-
-cleanup2:
-	free_irq(pdev->resource[1].start, udc);
-
 cleanup1:
 	kfree(udc);
 	udc = NULL;
@@ -2961,12 +2950,6 @@ static int omap_udc_remove(struct platform_device *pdev)
 
 	remove_proc_file();
 
-#ifdef	USE_ISO
-	free_irq(pdev->resource[3].start, udc);
-#endif
-	free_irq(pdev->resource[2].start, udc);
-	free_irq(pdev->resource[1].start, udc);
-
 	if (udc->dc_clk) {
 		if (udc->clk_requested)
 			omap_udc_enable_clock(0);
-- 
2.17.1