[IRDA]: Oops fix for ksdazzle

This fixes a kernel oops triggered by the ksdazzle SIR driver.
We need more space for input frames, and 2048 should be plenty of it.

Signed-off-by: Alex Villacís Lasso <a_villacis@palosanto.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 3 deletions

diff --git a/drivers/net/irda/ksdazzle-sir.c b/drivers/net/irda/ksdazzle-sir.c
index af60f2435a38..d01a28593ce2 100644
--- a/drivers/net/irda/ksdazzle-sir.c
+++ b/drivers/net/irda/ksdazzle-sir.c
@@ -1,7 +1,7 @@
 /*****************************************************************************
 *
 * Filename:      ksdazzle.c
-* Version:       0.1.1
+* Version:       0.1.2
 * Description:   Irda KingSun Dazzle USB Dongle
 * Status:        Experimental
 * Author:        Alex Villacís Lasso <a_villacis@palosanto.com>
@@ -113,6 +113,7 @@ MODULE_DEVICE_TABLE(usb, dongles);
 #define KINGSUN_REQ_SEND 0x09
 
 #define KINGSUN_SND_FIFO_SIZE    2048   /* Max packet we can send */
+#define KINGSUN_RCV_MAX 2048    /* Max transfer we can receive */
 
 struct ksdazzle_speedparams {
         __le32 baudrate;        /* baud rate, little endian */
@@ -150,7 +151,7 @@ struct ksdazzle_cb {
         __u8 tx_payload[8];
 
         struct urb *rx_urb;
-        __u8 rx_payload[8];
+        __u8 *rx_buf;
         iobuff_t rx_unwrap_buff;
 
         struct usb_ctrlrequest *speed_setuprequest;
@@ -440,7 +441,8 @@ static int ksdazzle_net_open(struct net_device *netdev)
         /* Start reception. */
         usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
                          usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
-                         kingsun->rx_payload, 8, ksdazzle_rcv_irq, kingsun, 1);
+                         kingsun->rx_buf, KINGSUN_RCV_MAX, ksdazzle_rcv_irq,
+                         kingsun, 1);
         kingsun->rx_urb->status = 0;
         err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
         if (err) {
@@ -641,6 +643,7 @@ static int ksdazzle_probe(struct usb_interface *intf,
         kingsun->tx_buf_clear_sent = 0;
 
         kingsun->rx_urb = NULL;
+        kingsun->rx_buf = NULL;
         kingsun->rx_unwrap_buff.in_frame = FALSE;
         kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
         kingsun->rx_unwrap_buff.skb = NULL;
@@ -651,6 +654,11 @@ static int ksdazzle_probe(struct usb_interface *intf,
         kingsun->speed_urb = NULL;
         kingsun->speedparams.baudrate = 0;
 
+        /* Allocate input buffer */
+        kingsun->rx_buf = kmalloc(KINGSUN_RCV_MAX, GFP_KERNEL);
+        if (!kingsun->rx_buf)
+                goto free_mem;
+
         /* Allocate output buffer */
         kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL);
         if (!kingsun->tx_buf_clear)
@@ -714,6 +722,7 @@ static int ksdazzle_probe(struct usb_interface *intf,
       free_mem:
         kfree(kingsun->speed_setuprequest);
         kfree(kingsun->tx_buf_clear);
+        kfree(kingsun->rx_buf);
         free_netdev(net);
       err_out1:
         return ret;
@@ -746,6 +755,7 @@ static void ksdazzle_disconnect(struct usb_interface *intf)
 
         kfree(kingsun->speed_setuprequest);
         kfree(kingsun->tx_buf_clear);
+        kfree(kingsun->rx_buf);
         free_netdev(kingsun->netdev);
 
         usb_set_intfdata(intf, NULL);