redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

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

commit 783f3b4e9e 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: 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>
pull/10/head
Bin Liu 2018-09-17 11:40:22 -05:00 committed by Greg Kroah-Hartman
parent 5b6717c6a3
commit e75c01761a
1 changed files with 1 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/usb/musb/musb_dsps.c
View File

@ -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,