Pull asus into release branch

[pandora-kernel.git] / drivers / spi / spi_bitbang.c

diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c
index a23862e..88425e1 100644 (file)
--- a/drivers/spi/spi_bitbang.c
+++ b/drivers/spi/spi_bitbang.c
@@ -196,7 +196,7 @@ int spi_bitbang_setup(struct spi_device *spi)
                return -EINVAL;
 
        if (!cs) {
-               cs = kzalloc(sizeof *cs, SLAB_KERNEL);
+               cs = kzalloc(sizeof *cs, GFP_KERNEL);
                if (!cs)
                        return -ENOMEM;
                spi->controller_state = cs;
@@ -210,7 +210,7 @@ int spi_bitbang_setup(struct spi_device *spi)
        if (!cs->txrx_word)
                return -EINVAL;
 
-       retval = spi_bitbang_setup_transfer(spi, NULL);
+       retval = bitbang->setup_transfer(spi, NULL);
        if (retval < 0)
                return retval;
 
@@ -238,7 +238,7 @@ EXPORT_SYMBOL_GPL(spi_bitbang_setup);
 /**
  * spi_bitbang_cleanup - default cleanup for per-word I/O loops
  */
-void spi_bitbang_cleanup(const struct spi_device *spi)
+void spi_bitbang_cleanup(struct spi_device *spi)
 {
        kfree(spi->controller_state);
 }
@@ -265,9 +265,10 @@ static int spi_bitbang_bufs(struct spi_device *spi, struct spi_transfer *t)
  * Drivers can provide word-at-a-time i/o primitives, or provide
  * transfer-at-a-time ones to leverage dma or fifo hardware.
  */
-static void bitbang_work(void *_bitbang)
+static void bitbang_work(struct work_struct *work)
 {
-       struct spi_bitbang      *bitbang = _bitbang;
+       struct spi_bitbang      *bitbang =
+               container_of(work, struct spi_bitbang, work);
        unsigned long           flags;
 
        spin_lock_irqsave(&bitbang->lock, flags);
@@ -301,10 +302,6 @@ static void bitbang_work(void *_bitbang)
                setup_transfer = NULL;
 
                list_for_each_entry (t, &m->transfers, transfer_list) {
-                       if (bitbang->shutdown) {
-                               status = -ESHUTDOWN;
-                               break;
-                       }
 
                        /* override or restore speed and wordsize */
                        if (t->speed_hz || t->bits_per_word) {
@@ -409,8 +406,6 @@ int spi_bitbang_transfer(struct spi_device *spi, struct spi_message *m)
        m->status = -EINPROGRESS;
 
        bitbang = spi_master_get_devdata(spi->master);
-       if (bitbang->shutdown)
-               return -ESHUTDOWN;
 
        spin_lock_irqsave(&bitbang->lock, flags);
        if (!spi->max_speed_hz)
@@ -441,9 +436,10 @@ EXPORT_SYMBOL_GPL(spi_bitbang_transfer);
  * hardware that basically exposes a shift register) or per-spi_transfer
  * (which takes better advantage of hardware like fifos or DMA engines).
  *
- * Drivers using per-word I/O loops should use (or call) spi_bitbang_setup and
- * spi_bitbang_cleanup to handle those spi master methods.  Those methods are
- * the defaults if the bitbang->txrx_bufs routine isn't initialized.
+ * Drivers using per-word I/O loops should use (or call) spi_bitbang_setup,
+ * spi_bitbang_cleanup and spi_bitbang_setup_transfer to handle those spi
+ * master methods.  Those methods are the defaults if the bitbang->txrx_bufs
+ * routine isn't initialized.
  *
  * This routine registers the spi_master, which will process requests in a
  * dedicated task, keeping IRQs unblocked most of the time.  To stop
@@ -456,7 +452,7 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
        if (!bitbang->master || !bitbang->chipselect)
                return -EINVAL;
 
-       INIT_WORK(&bitbang->work, bitbang_work, bitbang);
+       INIT_WORK(&bitbang->work, bitbang_work);
        spin_lock_init(&bitbang->lock);
        INIT_LIST_HEAD(&bitbang->queue);
 
@@ -505,28 +501,12 @@ EXPORT_SYMBOL_GPL(spi_bitbang_start);
  */
 int spi_bitbang_stop(struct spi_bitbang *bitbang)
 {
-       unsigned        limit = 500;
-
-       spin_lock_irq(&bitbang->lock);
-       bitbang->shutdown = 0;
-       while (!list_empty(&bitbang->queue) && limit--) {
-               spin_unlock_irq(&bitbang->lock);
+       spi_unregister_master(bitbang->master);
 
-               dev_dbg(bitbang->master->cdev.dev, "wait for queue\n");
-               msleep(10);
-
-               spin_lock_irq(&bitbang->lock);
-       }
-       spin_unlock_irq(&bitbang->lock);
-       if (!list_empty(&bitbang->queue)) {
-               dev_err(bitbang->master->cdev.dev, "queue didn't empty\n");
-               return -EBUSY;
-       }
+       WARN_ON(!list_empty(&bitbang->queue));
 
        destroy_workqueue(bitbang->workqueue);
 
-       spi_unregister_master(bitbang->master);
-
        return 0;
 }
 EXPORT_SYMBOL_GPL(spi_bitbang_stop);