usb: dwc3: core: drop DWC3_EVENT_BUFFERS_MAX

hardware will tell us how many event buffers we
need to support, so let's allocate the array
dynamically too.

Signed-off-by: Felipe Balbi <balbi@ti.com>

2 files changed, 7 insertions, 2 deletions

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 83e382b4ae28..a2db41162575 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -221,6 +221,12 @@ static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
         num = DWC3_NUM_INT(dwc->hwparams.hwparams1);
         dwc->num_event_buffers = num;
 
+        dwc->ev_buffs = kzalloc(sizeof(*dwc->ev_buffs) * num, GFP_KERNEL);
+        if (!dwc->ev_buffs) {
+                dev_err(dwc->dev, "can't allocate event buffers array\n");
+                return -ENOMEM;
+        }
+
         for (i = 0; i < num; i++) {
                 struct dwc3_event_buffer        *evt;
 
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 95d5a87b4091..d6f1b793cd04 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -53,7 +53,6 @@
 /* Global constants */
 #define DWC3_ENDPOINTS_NUM      32
 
-#define DWC3_EVENT_BUFFERS_MAX  2
 #define DWC3_EVENT_BUFFERS_SIZE PAGE_SIZE
 #define DWC3_EVENT_TYPE_MASK    0xfe
 
@@ -603,7 +602,7 @@ struct dwc3 {
         struct platform_device  *xhci;
         struct resource         *res;
 
-        struct dwc3_event_buffer *ev_buffs[DWC3_EVENT_BUFFERS_MAX];
+        struct dwc3_event_buffer **ev_buffs;
         struct dwc3_ep          *eps[DWC3_ENDPOINTS_NUM];
 
         struct usb_gadget       gadget;