[PATCH 1/1] kfifo: fix DMA sample driver
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From: Ira W. Snyder on 13 Aug 2010 14:40 The kfifo DMA sample driver is broken. It does not properly initialize the scatterlist, and therefore causes a kernel BUG with CONFIG_DEBUG_SG=y. Signed-off-by: Ira W. Snyder <iws(a)ovro.caltech.edu> --- samples/kfifo/dma-example.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/samples/kfifo/dma-example.c b/samples/kfifo/dma-example.c index b9482c2..baa5060 100644 --- a/samples/kfifo/dma-example.c +++ b/samples/kfifo/dma-example.c @@ -45,6 +45,9 @@ static int __init example_init(void) printk(KERN_INFO "queue len: %u\n", kfifo_len(&fifo)); + /* initialize scatterlist */ + sg_init_table(sg, ARRAY_SIZE(sg)); + ret = kfifo_dma_in_prepare(&fifo, sg, ARRAY_SIZE(sg), FIFO_SIZE); printk(KERN_INFO "DMA sgl entries: %d\n", ret); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |