diff options
| author | Pekka Enberg <penberg@kernel.org> | 2010-10-24 19:57:05 +0300 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2010-10-24 19:57:05 +0300 |
| commit | 6d4121f6c20a0e86231d52f535f1c82423b3326f (patch) | |
| tree | 5c235cac699ca86b504850aa663ddadde0455a61 /samples/kfifo/dma-example.c | |
| parent | 92a5bbc11ff2442a54b2f1d313088c245828ef4e (diff) | |
| parent | 35da7a307c535f9c2929cae277f3df425c9f9b1e (diff) | |
Merge branch 'master' into for-linus
Conflicts:
include/linux/percpu.h
mm/percpu.c
Diffstat (limited to 'samples/kfifo/dma-example.c')
| -rw-r--r-- | samples/kfifo/dma-example.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/samples/kfifo/dma-example.c b/samples/kfifo/dma-example.c index ee03a4f0b64..06473791c08 100644 --- a/samples/kfifo/dma-example.c +++ b/samples/kfifo/dma-example.c @@ -24,6 +24,7 @@ static int __init example_init(void) { int i; unsigned int ret; + unsigned int nents; struct scatterlist sg[10]; printk(KERN_INFO "DMA fifo test start\n"); @@ -61,9 +62,9 @@ static int __init example_init(void) * byte at the beginning, after the kfifo_skip(). */ 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); - if (!ret) { + nents = kfifo_dma_in_prepare(&fifo, sg, ARRAY_SIZE(sg), FIFO_SIZE); + printk(KERN_INFO "DMA sgl entries: %d\n", nents); + if (!nents) { /* fifo is full and no sgl was created */ printk(KERN_WARNING "error kfifo_dma_in_prepare\n"); return -EIO; @@ -71,7 +72,7 @@ static int __init example_init(void) /* receive data */ printk(KERN_INFO "scatterlist for receive:\n"); - for (i = 0; i < ARRAY_SIZE(sg); i++) { + for (i = 0; i < nents; i++) { printk(KERN_INFO "sg[%d] -> " "page_link 0x%.8lx offset 0x%.8x length 0x%.8x\n", @@ -91,16 +92,16 @@ static int __init example_init(void) kfifo_dma_in_finish(&fifo, ret); /* Prepare to transmit data, example: 8 bytes */ - ret = kfifo_dma_out_prepare(&fifo, sg, ARRAY_SIZE(sg), 8); - printk(KERN_INFO "DMA sgl entries: %d\n", ret); - if (!ret) { + nents = kfifo_dma_out_prepare(&fifo, sg, ARRAY_SIZE(sg), 8); + printk(KERN_INFO "DMA sgl entries: %d\n", nents); + if (!nents) { /* no data was available and no sgl was created */ printk(KERN_WARNING "error kfifo_dma_out_prepare\n"); return -EIO; } printk(KERN_INFO "scatterlist for transmit:\n"); - for (i = 0; i < ARRAY_SIZE(sg); i++) { + for (i = 0; i < nents; i++) { printk(KERN_INFO "sg[%d] -> " "page_link 0x%.8lx offset 0x%.8x length 0x%.8x\n", |