[PATCH 5/6] [Blackfin] SPI driver: Fix bug SPI_write should not return until complete bit is set.

[Bryan Wu]

From: Sonic Zhang <[EMAIL PROTECTED]>

Signed-off-by: Sonic Zhang <[EMAIL PROTECTED]>
Signed-off-by: Bryan Wu <[EMAIL PROTECTED]>
---
 drivers/spi/spi_bfin5xx.c |   22 ++++++++++------------
 1 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index c5d4d77..9f12639 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -278,16 +278,16 @@ static void u8_writer(struct driver_data *drv_data)
        dev_dbg(&drv_data->pdev->dev,
                "cr8-s is 0x%x\n", read_STAT(drv_data));
 
-       /* poll for SPI completion before start */
-       while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
-               cpu_relax();
-
        while (drv_data->tx < drv_data->tx_end) {
                write_TDBR(drv_data, (*(u8 *) (drv_data->tx)));
                while (read_STAT(drv_data) & BIT_STAT_TXS)
                        cpu_relax();
                ++drv_data->tx;
        }
+
+       /* poll for SPI completion before return */
+       while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
+               cpu_relax();
 }
 
 static void u8_cs_chg_writer(struct driver_data *drv_data)
@@ -398,32 +398,30 @@ static void u16_writer(struct driver_data *drv_data)
        dev_dbg(&drv_data->pdev->dev,
                "cr16 is 0x%x\n", read_STAT(drv_data));
 
-       /* poll for SPI completion before start */
-       while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
-               cpu_relax();
-
        while (drv_data->tx < drv_data->tx_end) {
                write_TDBR(drv_data, (*(u16 *) (drv_data->tx)));
                while ((read_STAT(drv_data) & BIT_STAT_TXS))
                        cpu_relax();
                drv_data->tx += 2;
        }
+
+       /* poll for SPI completion before return */
+       while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
+               cpu_relax();
 }
 
 static void u16_cs_chg_writer(struct driver_data *drv_data)
 {
        struct chip_data *chip = drv_data->cur_chip;
 
-       /* poll for SPI completion before start */
-       while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
-               cpu_relax();
-
        while (drv_data->tx < drv_data->tx_end) {
                cs_active(drv_data, chip);
 
                write_TDBR(drv_data, (*(u16 *) (drv_data->tx)));
                while ((read_STAT(drv_data) & BIT_STAT_TXS))
                        cpu_relax();
+               while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
+                       cpu_relax();
 
                cs_deactive(drv_data, chip);
 
-- 
1.5.3.4
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