[12/20] sh: dma: Remove unused dmac_search_free_channel()

Commit Message

Geert Uytterhoeven March 1, 2024, 9:02 p.m. UTC

arch/sh/drivers/dma/dma-api.c:164:5: warning: no previous prototype for 'dmac_search_free_channel' [-Wmissing-prototypes]

dmac_search_free_channel() never had a user in upstream, remove it.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
---
dma_extend(), get_dma_info_by_name(), register_chan_caps(), and
request_dma_bycap() are also unused, but don't trigger warnings
---
 arch/sh/drivers/dma/dma-api.c | 27 ---------------------------
 1 file changed, 27 deletions(-)

Patch

diff --git a/arch/sh/drivers/dma/dma-api.c b/arch/sh/drivers/dma/dma-api.c
index 89cd4a3b4ccafbe2..f49097fa634c36d4 100644
--- a/arch/sh/drivers/dma/dma-api.c
+++ b/arch/sh/drivers/dma/dma-api.c
@@ -161,33 +161,6 @@  int request_dma_bycap(const char **dmac, const char **caps, const char *dev_id)
 }
 EXPORT_SYMBOL(request_dma_bycap);
 
-int dmac_search_free_channel(const char *dev_id)
-{
-	struct dma_channel *channel = { 0 };
-	struct dma_info *info = get_dma_info(0);
-	int i;
-
-	for (i = 0; i < info->nr_channels; i++) {
-		channel = &info->channels[i];
-		if (unlikely(!channel))
-			return -ENODEV;
-
-		if (atomic_read(&channel->busy) == 0)
-			break;
-	}
-
-	if (info->ops->request) {
-		int result = info->ops->request(channel);
-		if (result)
-			return result;
-
-		atomic_set(&channel->busy, 1);
-		return channel->chan;
-	}
-
-	return -ENOSYS;
-}
-
 int request_dma(unsigned int chan, const char *dev_id)
 {
 	struct dma_channel *channel = { 0 };