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Date: Tue, 13 Jan 2015 22:17:03 +0100
From: Arnd Bergmann <arnd@...db.de>
To: dmaengine@...r.kernel.org
Cc: Linus Walleij <linus.walleij@...aro.org>,
Vinod Koul <vinod.koul@...el.com>,
Dan Williams <dan.j.williams@...el.com>,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: [PATCH] dma: coh901318: fix function return types build warnings
A recent patch that removed coh901318_control() replaced it
with a number of pointers to existing functions, but those
unfortunately have the wrong return type and need to be
changed to return an 'int' with an error value rather than
a 'void' to avoid these build warnings:
drivers/dma/coh901318.c:2697:32: warning: assignment from incompatible pointer type
base->dma_slave.device_config = coh901318_dma_set_runtimeconfig;
^
drivers/dma/coh901318.c:2698:31: warning: assignment from incompatible pointer type
base->dma_slave.device_pause = coh901318_pause;
^
drivers/dma/coh901318.c:2699:32: warning: assignment from incompatible pointer type
base->dma_slave.device_resume = coh901318_resume
The coh901318_base_init function has the correct return type
already, but needs to be marked 'static' to avoid a sparse
warning about a missing declaration.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: 6782af118b6c ("dmaengine: coh901318: Split device_control")
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index 418e4e4fb7ba..fd22dd36985f 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -1690,7 +1690,7 @@ static u32 coh901318_get_bytes_left(struct dma_chan *chan)
* Pauses a transfer without losing data. Enables power save.
* Use this function in conjunction with coh901318_resume.
*/
-static void coh901318_pause(struct dma_chan *chan)
+static int coh901318_pause(struct dma_chan *chan)
{
u32 val;
unsigned long flags;
@@ -1730,12 +1730,13 @@ static void coh901318_pause(struct dma_chan *chan)
enable_powersave(cohc);
spin_unlock_irqrestore(&cohc->lock, flags);
+ return 0;
}
/* Resumes a transfer that has been stopped via 300_dma_stop(..).
Power save is handled.
*/
-static void coh901318_resume(struct dma_chan *chan)
+static int coh901318_resume(struct dma_chan *chan)
{
u32 val;
unsigned long flags;
@@ -1760,6 +1761,7 @@ static void coh901318_resume(struct dma_chan *chan)
}
spin_unlock_irqrestore(&cohc->lock, flags);
+ return 0;
}
bool coh901318_filter_id(struct dma_chan *chan, void *chan_id)
@@ -2512,8 +2514,8 @@ static const struct burst_table burst_sizes[] = {
},
};
-static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
- struct dma_slave_config *config)
+static int coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
+ struct dma_slave_config *config)
{
struct coh901318_chan *cohc = to_coh901318_chan(chan);
dma_addr_t addr;
@@ -2533,7 +2535,7 @@ static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
maxburst = config->dst_maxburst;
} else {
dev_err(COHC_2_DEV(cohc), "illegal channel mode\n");
- return;
+ return -EINVAL;
}
dev_dbg(COHC_2_DEV(cohc), "configure channel for %d byte transfers\n",
@@ -2579,7 +2581,7 @@ static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
default:
dev_err(COHC_2_DEV(cohc),
"bad runtimeconfig: alien address width\n");
- return;
+ return -EINVAL;
}
ctrl |= burst_sizes[i].reg;
@@ -2589,10 +2591,12 @@ static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
cohc->addr = addr;
cohc->ctrl = ctrl;
+
+ return 0;
}
-void coh901318_base_init(struct dma_device *dma, const int *pick_chans,
- struct coh901318_base *base)
+static void coh901318_base_init(struct dma_device *dma, const int *pick_chans,
+ struct coh901318_base *base)
{
int chans_i;
int i = 0;
--
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