X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=drivers%2Fspi%2Fspi_bfin5xx.c;h=f540ed77a1021cda053c72d3e8c293606b31e099;hb=91fe7d7cdd7ebb0b6c01f201a23824ab5b466ada;hp=a2d4884752efb4a46f97b2d9fb743d9ce69dee2d;hpb=27bb9e79bcfedc1888d23c3c212c189fa8534fe7;p=~andy%2Flinux

diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index a2d4884752e..f540ed77a10 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -582,14 +582,19 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id)
 	dev_dbg(&drv_data->pdev->dev, "in dma_irq_handler\n");
 	clear_dma_irqstat(CH_SPI);
 
+	/* Wait for DMA to complete */
+	while (get_dma_curr_irqstat(CH_SPI) & DMA_RUN)
+		continue;
+
 	/*
-	 * wait for the last transaction shifted out.  yes, these two
-	 * while loops are supposed to be the same (see the HRM).
+	 * wait for the last transaction shifted out.  HRM states:
+	 * at this point there may still be data in the SPI DMA FIFO waiting
+	 * to be transmitted ... software needs to poll TXS in the SPI_STAT
+	 * register until it goes low for 2 successive reads
 	 */
 	if (drv_data->tx != NULL) {
-		while (bfin_read_SPI_STAT() & TXS)
-			continue;
-		while (bfin_read_SPI_STAT() & TXS)
+		while ((bfin_read_SPI_STAT() & TXS) ||
+		       (bfin_read_SPI_STAT() & TXS))
 			continue;
 	}
 
@@ -1298,8 +1303,9 @@ static int bfin5xx_spi_resume(struct platform_device *pdev)
 #define bfin5xx_spi_resume NULL
 #endif				/* CONFIG_PM */
 
+MODULE_ALIAS("bfin-spi-master");	/* for platform bus hotplug */
 static struct platform_driver bfin5xx_spi_driver = {
-	.driver 	= {
+	.driver	= {
 		.name	= "bfin-spi-master",
 		.owner	= THIS_MODULE,
 	},