compat-wireless: backport kfifo for libertas

First part of the kfifo backport.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/patches/19-kfifo.patch b/patches/19-kfifo.patch
new file mode 100644 (file)
index 0000000..d59f76e
--- /dev/null
+++ b/patches/19-kfifo.patch
@@ -0,0 +1,47 @@
+These parts of the new generic kernel FIFO implementation (kfifo) can
+not be backported easily with defines in the compat module.
+
+--- a/drivers/net/wireless/libertas/dev.h
++++ b/drivers/net/wireless/libertas/dev.h
+@@ -119,7 +119,11 @@ struct lbs_private {
+       u32 resp_len[2];
+ 
+       /* Events sent from hardware to driver */
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
+       struct kfifo event_fifo;
++#else
++      struct kfifo *event_fifo;
++#endif
+ 
+       /** thread to service interrupts */
+       struct task_struct *main_thread;
+--- a/drivers/net/wireless/libertas/main.c
++++ b/drivers/net/wireless/libertas/main.c
+@@ -872,8 +872,14 @@ static int lbs_init_adapter(struct lbs_private *priv)
+       priv->resp_len[0] = priv->resp_len[1] = 0;
+ 
+       /* Create the event FIFO */
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
+       ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
+       if (ret) {
++#else
++      priv->event_fifo = kfifo_alloc(sizeof(u32) * 16, GFP_KERNEL, NULL);
++      if (IS_ERR(priv->event_fifo)) {
++              ret = -ENOMEM;
++#endif
+               lbs_pr_err("Out of memory allocating event FIFO buffer\n");
+               goto out;
+       }
+@@ -889,7 +895,12 @@ static void lbs_free_adapter(struct lbs_private *priv)
+       lbs_deb_enter(LBS_DEB_MAIN);
+ 
+       lbs_free_cmd_buffer(priv);
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
+       kfifo_free(&priv->event_fifo);
++#else
++      if (priv->event_fifo)
++              kfifo_free(priv->event_fifo);
++#endif
+       del_timer(&priv->command_timer);
+       del_timer(&priv->auto_deepsleep_timer);
+       kfree(priv->networks);