From e75c01761a11c445246bb59e15b0d2dea428f6a5 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 17 Sep 2018 11:40:22 -0500 Subject: [PATCH] usb: musb: dsps: do not disable CPPI41 irq in driver teardown commit 783f3b4e9ec50491c21746e7e05ec6c39c21f563 upstream. TI AM335x CPPI 4.1 module uses a single register bit for CPPI interrupts in both musb controllers. So disabling the CPPI irq in one musb driver breaks the other musb module. Since musb is already disabled before tearing down dma controller in musb_remove(), it is safe to not disable CPPI irq in musb_dma_controller_destroy(). Fixes: 255348289f71 ("usb: musb: dsps: Manage CPPI 4.1 DMA interrupt in DSPS") Cc: stable@vger.kernel.org Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_dsps.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index f6b526606ad1..dbb482b7e0ba 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -684,16 +684,6 @@ dsps_dma_controller_create(struct musb *musb, void __iomem *base) return controller; } -static void dsps_dma_controller_destroy(struct dma_controller *c) -{ - struct musb *musb = c->musb; - struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent); - void __iomem *usbss_base = glue->usbss_base; - - musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP); - cppi41_dma_controller_destroy(c); -} - #ifdef CONFIG_PM_SLEEP static void dsps_dma_controller_suspend(struct dsps_glue *glue) { @@ -723,7 +713,7 @@ static struct musb_platform_ops dsps_ops = { #ifdef CONFIG_USB_TI_CPPI41_DMA .dma_init = dsps_dma_controller_create, - .dma_exit = dsps_dma_controller_destroy, + .dma_exit = cppi41_dma_controller_destroy, #endif .enable = dsps_musb_enable, .disable = dsps_musb_disable, -- 2.20.1