spi: bitbang: simplify pointer arithmetics

Add a pointer variable to make spi_bitbang_start() look simpler.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/spi/spi-bitbang.c b/drivers/spi/spi-bitbang.c
index 8b3d8ef..328c4dc 100644 (file)
--- a/drivers/spi/spi-bitbang.c
+++ b/drivers/spi/spi-bitbang.c
@@ -427,40 +427,41 @@ EXPORT_SYMBOL_GPL(spi_bitbang_transfer);
  */
 int spi_bitbang_start(struct spi_bitbang *bitbang)
 {
-       int     status;
+       struct spi_master *master = bitbang->master;
+       int status;
 
-       if (!bitbang->master || !bitbang->chipselect)
+       if (!master || !bitbang->chipselect)
                return -EINVAL;
 
        INIT_WORK(&bitbang->work, bitbang_work);
        spin_lock_init(&bitbang->lock);
        INIT_LIST_HEAD(&bitbang->queue);
 
-       if (!bitbang->master->mode_bits)
-               bitbang->master->mode_bits = SPI_CPOL | SPI_CPHA | bitbang->flags;
+       if (!master->mode_bits)
+               master->mode_bits = SPI_CPOL | SPI_CPHA | bitbang->flags;
 
-       if (!bitbang->master->transfer)
-               bitbang->master->transfer = spi_bitbang_transfer;
+       if (!master->transfer)
+               master->transfer = spi_bitbang_transfer;
        if (!bitbang->txrx_bufs) {
                bitbang->use_dma = 0;
                bitbang->txrx_bufs = spi_bitbang_bufs;
-               if (!bitbang->master->setup) {
+               if (!master->setup) {
                        if (!bitbang->setup_transfer)
                                bitbang->setup_transfer =
                                         spi_bitbang_setup_transfer;
-                       bitbang->master->setup = spi_bitbang_setup;
-                       bitbang->master->cleanup = spi_bitbang_cleanup;
+                       master->setup = spi_bitbang_setup;
+                       master->cleanup = spi_bitbang_cleanup;
                }
-       } else if (!bitbang->master->setup)
+       } else if (!master->setup)
                return -EINVAL;
-       if (bitbang->master->transfer == spi_bitbang_transfer &&
+       if (master->transfer == spi_bitbang_transfer &&
                        !bitbang->setup_transfer)
                return -EINVAL;
 
        /* this task is the only thing to touch the SPI bits */
        bitbang->busy = 0;
        bitbang->workqueue = create_singlethread_workqueue(
-                       dev_name(bitbang->master->dev.parent));
+                       dev_name(master->dev.parent));
        if (bitbang->workqueue == NULL) {
                status = -EBUSY;
                goto err1;
@@ -469,7 +470,7 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
        /* driver may get busy before register() returns, especially
         * if someone registered boardinfo for devices
         */
-       status = spi_register_master(bitbang->master);
+       status = spi_register_master(master);
        if (status < 0)
                goto err2;