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usb: musb: dsps: do not disable CPPI41 irq in driver teardown

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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: 255348289f ("usb: musb: dsps: Manage CPPI 4.1 DMA interrupt in DSPS")
Cc: stable@vger.kernel.org
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bin Liu 2018-09-17 11:40:22 -05:00 committed by Greg Kroah-Hartman
parent 7876320f88
commit 783f3b4e9e
1 changed files with 1 additions and 11 deletions
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12
drivers/usb/musb/musb_dsps.c
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@ -658,16 +658,6 @@ 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)
{
@ -697,7 +687,7 @@ 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,