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usb: musb: dma: merge ->start/stop into create/destroy

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The core code creates a controller and immediately after that it calls
the ->start() callback. This one might drop an error but nobody cares.
The same thing happens in the destroy corner: First ->stop() called
followed by destroy callback. So why not merge those two into the same
function since there is no difference.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Sebastian Andrzej Siewior
2013-06-19 17:38:11 +02:00
committed by Felipe Balbi
parent ff2283229d
commit 66c01883ef
6 changed files with 20 additions and 77 deletions
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19
drivers/usb/musb/ux500_dma.c
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@@ -254,10 +254,8 @@ static int ux500_dma_channel_abort(struct dma_channel *channel)
return 0;
}
static int ux500_dma_controller_stop(struct dma_controller *c)
static void ux500_dma_controller_stop(struct ux500_dma_controller *controller)
{
struct ux500_dma_controller *controller = container_of(c,
struct ux500_dma_controller, controller);
struct ux500_dma_channel *ux500_channel;
struct dma_channel *channel;
u8 ch_num;
@@ -281,14 +279,10 @@ static int ux500_dma_controller_stop(struct dma_controller *c)
if (ux500_channel->dma_chan)
dma_release_channel(ux500_channel->dma_chan);
}
return 0;
}
static int ux500_dma_controller_start(struct dma_controller *c)
static int ux500_dma_controller_start(struct ux500_dma_controller *controller)
{
struct ux500_dma_controller *controller = container_of(c,
struct ux500_dma_controller, controller);
struct ux500_dma_channel *ux500_channel = NULL;
struct musb *musb = controller->private_data;
struct device *dev = musb->controller;
@@ -347,7 +341,7 @@ static int ux500_dma_controller_start(struct dma_controller *c)
dir, ch_num);
/* Release already allocated channels */
ux500_dma_controller_stop(c);
ux500_dma_controller_stop(controller);
return -EBUSY;
}
@@ -369,6 +363,7 @@ void dma_controller_destroy(struct dma_controller *c)
struct ux500_dma_controller *controller = container_of(c,
struct ux500_dma_controller, controller);
ux500_dma_controller_stop(controller);
kfree(controller);
}
@@ -378,6 +373,7 @@ struct dma_controller *dma_controller_create(struct musb *musb,
struct ux500_dma_controller *controller;
struct platform_device *pdev = to_platform_device(musb->controller);
struct resource *iomem;
int ret;
controller = kzalloc(sizeof(*controller), GFP_KERNEL);
if (!controller)
@@ -394,14 +390,15 @@ struct dma_controller *dma_controller_create(struct musb *musb,
controller->phy_base = (dma_addr_t) iomem->start;
controller->controller.start = ux500_dma_controller_start;
controller->controller.stop = ux500_dma_controller_stop;
controller->controller.channel_alloc = ux500_dma_channel_allocate;
controller->controller.channel_release = ux500_dma_channel_release;
controller->controller.channel_program = ux500_dma_channel_program;
controller->controller.channel_abort = ux500_dma_channel_abort;
controller->controller.is_compatible = ux500_dma_is_compatible;
ret = ux500_dma_controller_start(controller);
if (ret)
goto plat_get_fail;
return &controller->controller;
plat_get_fail: