Commit 3ef35faf authored by Felipe Balbi's avatar Felipe Balbi
Browse files

usb: dwc3: define DWC3_EP0_BOUNCE_SIZE 



to avoid sprinkling magic constants on the driver
we define a constant to be used when allocating
setup_buffer and ep0_bounce buffer.

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent f898ae09

drivers/usb/dwc3/core.h

+1 −0
Original line number Diff line number Diff line
@@ -51,6 +51,7 @@ 
#include <linux/usb/gadget.h>



/* Global constants */

#define DWC3_EP0_BOUNCE_SIZE	512

#define DWC3_ENDPOINTS_NUM	32

#define DWC3_XHCI_RESOURCES_NUM	2

drivers/usb/dwc3/gadget.c

+7 −6
Original line number Diff line number Diff line
@@ -2319,7 +2319,7 @@ int __devinit dwc3_gadget_init(struct dwc3 *dwc) 
		goto err1;

	}



	dwc->setup_buf = kzalloc(512, GFP_KERNEL);

	dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL);

	if (!dwc->setup_buf) {

		dev_err(dwc->dev, "failed to allocate setup buffer\n");

		ret = -ENOMEM;
@@ -2327,7 +2327,8 @@ int __devinit dwc3_gadget_init(struct dwc3 *dwc) 
	}



	dwc->ep0_bounce = dma_alloc_coherent(dwc->dev,

			512, &dwc->ep0_bounce_addr, GFP_KERNEL);

			DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr,

			GFP_KERNEL);

	if (!dwc->ep0_bounce) {

		dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n");

		ret = -ENOMEM;
@@ -2414,8 +2415,8 @@ int __devinit dwc3_gadget_init(struct dwc3 *dwc) 
	dwc3_gadget_free_endpoints(dwc);



err4:

	dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce,

			dwc->ep0_bounce_addr);

	dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE,

			dwc->ep0_bounce, dwc->ep0_bounce_addr);



err3:

	kfree(dwc->setup_buf);
@@ -2444,8 +2445,8 @@ void dwc3_gadget_exit(struct dwc3 *dwc) 


	dwc3_gadget_free_endpoints(dwc);



	dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce,

			dwc->ep0_bounce_addr);

	dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE,

			dwc->ep0_bounce, dwc->ep0_bounce_addr);



	kfree(dwc->setup_buf);