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| author | Olof Johansson <olof@lixom.net> | 2013-09-05 23:30:52 +0400 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2013-09-10 04:14:09 +0400 |
| commit | d5ece9373c6e0f95ae59f303810e1ccbcd044629 (patch) | |
| tree | 18e7326ccb9cc58e417e1b9a651a4da8d2ca88ae /arch/arm/plat-pxa/ssp.c | |
| parent | 640414171818c6293c23e74a28d1c69b2a1a7fe5 (diff) | |
| download | linux-d5ece9373c6e0f95ae59f303810e1ccbcd044629.tar.xz | |
ARM: pxa: ssp: Check return values from phandle lookups
Commit a6e56c28a178cef5f (ARM: pxa: ssp: add DT bindings) causes warnings
when built:
arch/arm/plat-pxa/ssp.c: In function 'pxa_ssp_probe':
arch/arm/plat-pxa/ssp.c:145:17: warning: 'dma_spec.args[0]' may be used
uninitialized in this function [-Wmaybe-uninitialized]
Resolve by checking return values and aborting when lookups fail.
Cc: Daniel Mack <zonque@gmail.com>
Cc: Mark Brown <broonie@linaro.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/plat-pxa/ssp.c')
| -rw-r--r-- | arch/arm/plat-pxa/ssp.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/arm/plat-pxa/ssp.c b/arch/arm/plat-pxa/ssp.c index c83f27b6bdda..3ea02903d75a 100644 --- a/arch/arm/plat-pxa/ssp.c +++ b/arch/arm/plat-pxa/ssp.c @@ -132,6 +132,7 @@ static int pxa_ssp_probe(struct platform_device *pdev) if (dev->of_node) { struct of_phandle_args dma_spec; struct device_node *np = dev->of_node; + int ret; /* * FIXME: we should allocate the DMA channel from this @@ -140,14 +141,23 @@ static int pxa_ssp_probe(struct platform_device *pdev) */ /* rx */ - of_parse_phandle_with_args(np, "dmas", "#dma-cells", - 0, &dma_spec); + ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", + 0, &dma_spec); + + if (ret) { + dev_err(dev, "Can't parse dmas property\n"); + return -ENODEV; + } ssp->drcmr_rx = dma_spec.args[0]; of_node_put(dma_spec.np); /* tx */ - of_parse_phandle_with_args(np, "dmas", "#dma-cells", - 1, &dma_spec); + ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", + 1, &dma_spec); + if (ret) { + dev_err(dev, "Can't parse dmas property\n"); + return -ENODEV; + } ssp->drcmr_tx = dma_spec.args[0]; of_node_put(dma_spec.np); } else { |