diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-04-22 10:33:32 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2013-06-12 04:19:19 +0200 |
| commit | ff0e0f4f568e8d7593e0035c0c58067bcaf4ab07 (patch) | |
| tree | b0201097850ea0f27b5f427e9208860759cd9263 /drivers/dma/of-dma.c | |
| parent | Linux 3.10-rc5 (diff) | |
| download | linux-ff0e0f4f568e8d7593e0035c0c58067bcaf4ab07.tar.xz linux-ff0e0f4f568e8d7593e0035c0c58067bcaf4ab07.zip | |
dma: of: Remove restriction that #dma-cells can't be 0
There is no sensible reason why #dma-cells shouldn't be allowed to be 0. It is
completely up to the DMA controller how many additional parameters, besides the
phandle, it needs to identify a channel. E.g. for DMA controller with only one
channel or for DMA controllers which don't have a restriction on which channel
can be used for which peripheral it completely legitimate to not require any
additional parameters.
Also fixes the following warning:
drivers/dma/of-dma.c: In function 'of_dma_controller_register':
drivers/dma/of-dma.c:67:7: warning: 'nbcells' may be used uninitialized in this function
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/of-dma.c')
| -rw-r--r-- | drivers/dma/of-dma.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c index 7aa0864cd487..268cc8ab34e8 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -64,7 +64,6 @@ int of_dma_controller_register(struct device_node *np, void *data) { struct of_dma *ofdma; - int nbcells; const __be32 *prop; if (!np || !of_dma_xlate) { @@ -77,18 +76,16 @@ int of_dma_controller_register(struct device_node *np, return -ENOMEM; prop = of_get_property(np, "#dma-cells", NULL); - if (prop) - nbcells = be32_to_cpup(prop); - - if (!prop || !nbcells) { - pr_err("%s: #dma-cells property is missing or invalid\n", + if (!prop) { + pr_err("%s: #dma-cells property is missing\n", __func__); kfree(ofdma); return -EINVAL; } + ofdma->of_node = np; - ofdma->of_dma_nbcells = nbcells; + ofdma->of_dma_nbcells = be32_to_cpup(prop); ofdma->of_dma_xlate = of_dma_xlate; ofdma->of_dma_data = data; |