From: Mike Frysinger <vapier.adi@gmail.com>
Date: Tue, 7 Apr 2009 02:00:38 +0000 (-0700)
Subject: Blackfin SPI Driver: do not check for SPI errors if DMA itself did not flag any
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=40a2945b97b4da9120653d84f1c3a58fe58be64c;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Blackfin SPI Driver: do not check for SPI errors if DMA itself did not flag any

We only need to check SPI error when DMA failes, cause that is the DMA IRQ
handling routine.

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index 5acec9ff0175..5ebb67b011d0 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -587,7 +587,7 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id)
 	while (!(read_STAT(drv_data) & SPIF))
 		cpu_relax();
 
-	if (spistat & RBSY) {
+	if ((dmastat & DMA_ERR) && (spistat & RBSY)) {
 		msg->state = ERROR_STATE;
 		dev_err(&drv_data->pdev->dev, "dma receive: fifo/buffer overflow\n");
 	} else {