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authorLars-Peter Clausen <lars@metafoo.de>2013-04-22 12:33:33 +0400
committerVinod Koul <vinod.koul@intel.com>2013-06-12 06:19:19 +0400
commit8552bb4f16800d5ebc176a2cf5f2aa55b22731ea (patch)
tree307a72f913ce3e887c0ae3d5a0962039ff81db93 /drivers/dma/of-dma.c
parentff0e0f4f568e8d7593e0035c0c58067bcaf4ab07 (diff)
downloadlinux-8552bb4f16800d5ebc176a2cf5f2aa55b22731ea.tar.xz
dma: of: Remove check on always true condition
Both of_dma_nbcells field of the of_dma_controller and the args_count field of the dma_spec are initialized by parsing the #dma-cells attribute of their device tree node. So if the device tree nodes of a DMA controller and the dma_spec match this means that of_dma_nbcells and args_count will also match. So the second test in the of_dma_find_controller loop is redundant because given the first test yields true the second test will also yield true. So we can safely remove the test whether of_dma_nbcells matches args_count. Since this was the last user of the of_dma_nbcells field we can remove it altogether. 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.c14
1 files changed, 1 insertions, 13 deletions
diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c
index 268cc8ab34e8..75334bdd2c56 100644
--- a/drivers/dma/of-dma.c
+++ b/drivers/dma/of-dma.c
@@ -35,8 +35,7 @@ static struct of_dma *of_dma_find_controller(struct of_phandle_args *dma_spec)
struct of_dma *ofdma;
list_for_each_entry(ofdma, &of_dma_list, of_dma_controllers)
- if ((ofdma->of_node == dma_spec->np) &&
- (ofdma->of_dma_nbcells == dma_spec->args_count))
+ if (ofdma->of_node == dma_spec->np)
return ofdma;
pr_debug("%s: can't find DMA controller %s\n", __func__,
@@ -64,7 +63,6 @@ int of_dma_controller_register(struct device_node *np,
void *data)
{
struct of_dma *ofdma;
- const __be32 *prop;
if (!np || !of_dma_xlate) {
pr_err("%s: not enough information provided\n", __func__);
@@ -75,17 +73,7 @@ int of_dma_controller_register(struct device_node *np,
if (!ofdma)
return -ENOMEM;
- prop = of_get_property(np, "#dma-cells", NULL);
- if (!prop) {
- pr_err("%s: #dma-cells property is missing\n",
- __func__);
- kfree(ofdma);
- return -EINVAL;
- }
-
-
ofdma->of_node = np;
- ofdma->of_dma_nbcells = be32_to_cpup(prop);
ofdma->of_dma_xlate = of_dma_xlate;
ofdma->of_dma_data = data;