usb: gadget: ci13xx_udc.c: fix compile warning

Fix the following compile warning:

| usb/gadget/ci13xxx_udc.c: In function 'show_registers':
| usb/gadget/ci13xxx_udc.c:1242:1: warning: the frame size of 2064 bytes is larger than 1024 bytes

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 0824716..1265a85 100644 (file)
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1214,12 +1214,13 @@ static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL);
  *
  * Check "device.h" for details
  */
+#define DUMP_ENTRIES   512
 static ssize_t show_registers(struct device *dev,
                              struct device_attribute *attr, char *buf)
 {
        struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
        unsigned long flags;
-       u32 dump[512];
+       u32 *dump;
        unsigned i, k, n = 0;
 
        dbg_trace("[%s] %p\n", __func__, buf);
@@ -1228,8 +1229,14 @@ static ssize_t show_registers(struct device *dev,
                return 0;
        }
 
+       dump = kmalloc(sizeof(u32) * DUMP_ENTRIES, GFP_KERNEL);
+       if (!dump) {
+               dev_err(dev, "%s: out of memory\n", __func__);
+               return 0;
+       }
+
        spin_lock_irqsave(udc->lock, flags);
-       k = hw_register_read(dump, sizeof(dump)/sizeof(u32));
+       k = hw_register_read(dump, DUMP_ENTRIES);
        spin_unlock_irqrestore(udc->lock, flags);
 
        for (i = 0; i < k; i++) {
@@ -1237,6 +1244,7 @@ static ssize_t show_registers(struct device *dev,
                               "reg[0x%04X] = 0x%08X\n",
                               i * (unsigned)sizeof(u32), dump[i]);
        }
+       kfree(dump);
 
        return n;
 }