diff options
author | Julia Lawall <Julia.Lawall@lip6.fr> | 2012-08-04 10:35:30 +0200 |
---|---|---|
committer | Vinod Koul <vinod.koul@linux.intel.com> | 2012-08-22 09:17:34 +0530 |
commit | 94d3901c11ab4115740ec3891d07f086f18c8cd6 (patch) | |
tree | 239a876a1d6dece00586a978a2abb3632d5fcd01 | |
parent | c87a9fcd1ed6cd4ad27a0c65db6a470c8dd56190 (diff) | |
download | linux-94d3901c11ab4115740ec3891d07f086f18c8cd6.tar.gz linux-94d3901c11ab4115740ec3891d07f086f18c8cd6.tar.xz |
drivers/dma/sirf-dma.c: fix usage of devm functions
Fix some problems with the use of devm_ functions.
devm_kzalloc: devm_kfree is not needed
devm_ioremap: iounmap should not be used, no free is needed
devm_request_irq: the devm_free_irq is followed by irq_dispose_mapping. I
don't know if it is safe to move the freeing of the irq in this case, so I
have just un-devm'd this function, since the implicit freeing is never
taken advantage of.
In the original code failure of of_address_to_resource jumped to free_mem,
but should have jumped to irq_dispose, since irq_of_parse_and_map has
completed at this point.
In the original code unmap_mem was after irq_dispose, but it should have
been before, again since irq_of_parse_and_map has completed at this point.
One of these problems was found using the following semantic match:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression x;
@@
*x = devm_ioremap(...)
...
iounmap(x);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
-rw-r--r-- | drivers/dma/sirf-dma.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c index 434ad31174f2..1af9e4804a2c 100644 --- a/drivers/dma/sirf-dma.c +++ b/drivers/dma/sirf-dma.c @@ -570,21 +570,19 @@ static int __devinit sirfsoc_dma_probe(struct platform_device *op) if (of_property_read_u32(dn, "cell-index", &id)) { dev_err(dev, "Fail to get DMAC index\n"); - ret = -ENODEV; - goto free_mem; + return -ENODEV; } sdma->irq = irq_of_parse_and_map(dn, 0); if (sdma->irq == NO_IRQ) { dev_err(dev, "Error mapping IRQ!\n"); - ret = -EINVAL; - goto free_mem; + return -EINVAL; } ret = of_address_to_resource(dn, 0, &res); if (ret) { dev_err(dev, "Error parsing memory region!\n"); - goto free_mem; + goto irq_dispose; } regs_start = res.start; @@ -597,12 +595,11 @@ static int __devinit sirfsoc_dma_probe(struct platform_device *op) goto irq_dispose; } - ret = devm_request_irq(dev, sdma->irq, &sirfsoc_dma_irq, 0, DRV_NAME, - sdma); + ret = request_irq(sdma->irq, &sirfsoc_dma_irq, 0, DRV_NAME, sdma); if (ret) { dev_err(dev, "Error requesting IRQ!\n"); ret = -EINVAL; - goto unmap_mem; + goto irq_dispose; } dma = &sdma->dma; @@ -652,13 +649,9 @@ static int __devinit sirfsoc_dma_probe(struct platform_device *op) return 0; free_irq: - devm_free_irq(dev, sdma->irq, sdma); + free_irq(sdma->irq, sdma); irq_dispose: irq_dispose_mapping(sdma->irq); -unmap_mem: - iounmap(sdma->base); -free_mem: - devm_kfree(dev, sdma); return ret; } @@ -668,10 +661,8 @@ static int __devexit sirfsoc_dma_remove(struct platform_device *op) struct sirfsoc_dma *sdma = dev_get_drvdata(dev); dma_async_device_unregister(&sdma->dma); - devm_free_irq(dev, sdma->irq, sdma); + free_irq(sdma->irq, sdma); irq_dispose_mapping(sdma->irq); - iounmap(sdma->base); - devm_kfree(dev, sdma); return 0; } |