diff options
Diffstat (limited to 'target/linux/apm821xx/patches-4.4/010-dmaengine-Add-transfer-termination-synchronization-s.patch')
| -rw-r--r-- | target/linux/apm821xx/patches-4.4/010-dmaengine-Add-transfer-termination-synchronization-s.patch | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/target/linux/apm821xx/patches-4.4/010-dmaengine-Add-transfer-termination-synchronization-s.patch b/target/linux/apm821xx/patches-4.4/010-dmaengine-Add-transfer-termination-synchronization-s.patch deleted file mode 100644 index 89bdd49d2b..0000000000 --- a/target/linux/apm821xx/patches-4.4/010-dmaengine-Add-transfer-termination-synchronization-s.patch +++ /dev/null @@ -1,138 +0,0 @@ -From 7bd903c5ca47fde5ad52370a47776491813c772e Mon Sep 17 00:00:00 2001 -From: Peter Ujfalusi <peter.ujfalusi@ti.com> -Date: Mon, 14 Dec 2015 22:47:39 +0200 -Subject: [PATCH 1/3] dmaengine: core: Move and merge the code paths using - private_candidate - -Channel matching with private_candidate() is used in two paths, the error -checking is slightly different in them and they are duplicating code also. -Move the code under find_candidate() to provide consistent execution and -going to allow us to reuse this mode of channel lookup later. - -Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> -Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> -Reviewed-by: Arnd Bergmann <arnd@arndb.de> -Signed-off-by: Vinod Koul <vinod.koul@intel.com> ---- - drivers/dma/dmaengine.c | 81 +++++++++++++++++++++++++------------------------ - 1 file changed, 42 insertions(+), 39 deletions(-) - ---- a/drivers/dma/dmaengine.c -+++ b/drivers/dma/dmaengine.c -@@ -542,6 +542,42 @@ static struct dma_chan *private_candidat - return NULL; - } - -+static struct dma_chan *find_candidate(struct dma_device *device, -+ const dma_cap_mask_t *mask, -+ dma_filter_fn fn, void *fn_param) -+{ -+ struct dma_chan *chan = private_candidate(mask, device, fn, fn_param); -+ int err; -+ -+ if (chan) { -+ /* Found a suitable channel, try to grab, prep, and return it. -+ * We first set DMA_PRIVATE to disable balance_ref_count as this -+ * channel will not be published in the general-purpose -+ * allocator -+ */ -+ dma_cap_set(DMA_PRIVATE, device->cap_mask); -+ device->privatecnt++; -+ err = dma_chan_get(chan); -+ -+ if (err) { -+ if (err == -ENODEV) { -+ pr_debug("%s: %s module removed\n", __func__, -+ dma_chan_name(chan)); -+ list_del_rcu(&device->global_node); -+ } else -+ pr_debug("%s: failed to get %s: (%d)\n", -+ __func__, dma_chan_name(chan), err); -+ -+ if (--device->privatecnt == 0) -+ dma_cap_clear(DMA_PRIVATE, device->cap_mask); -+ -+ chan = ERR_PTR(err); -+ } -+ } -+ -+ return chan ? chan : ERR_PTR(-EPROBE_DEFER); -+} -+ - /** - * dma_get_slave_channel - try to get specific channel exclusively - * @chan: target channel -@@ -580,7 +616,6 @@ struct dma_chan *dma_get_any_slave_chann - { - dma_cap_mask_t mask; - struct dma_chan *chan; -- int err; - - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); -@@ -588,23 +623,11 @@ struct dma_chan *dma_get_any_slave_chann - /* lock against __dma_request_channel */ - mutex_lock(&dma_list_mutex); - -- chan = private_candidate(&mask, device, NULL, NULL); -- if (chan) { -- dma_cap_set(DMA_PRIVATE, device->cap_mask); -- device->privatecnt++; -- err = dma_chan_get(chan); -- if (err) { -- pr_debug("%s: failed to get %s: (%d)\n", -- __func__, dma_chan_name(chan), err); -- chan = NULL; -- if (--device->privatecnt == 0) -- dma_cap_clear(DMA_PRIVATE, device->cap_mask); -- } -- } -+ chan = find_candidate(device, &mask, NULL, NULL); - - mutex_unlock(&dma_list_mutex); - -- return chan; -+ return IS_ERR(chan) ? NULL : chan; - } - EXPORT_SYMBOL_GPL(dma_get_any_slave_channel); - -@@ -621,35 +644,15 @@ struct dma_chan *__dma_request_channel(c - { - struct dma_device *device, *_d; - struct dma_chan *chan = NULL; -- int err; - - /* Find a channel */ - mutex_lock(&dma_list_mutex); - list_for_each_entry_safe(device, _d, &dma_device_list, global_node) { -- chan = private_candidate(mask, device, fn, fn_param); -- if (chan) { -- /* Found a suitable channel, try to grab, prep, and -- * return it. We first set DMA_PRIVATE to disable -- * balance_ref_count as this channel will not be -- * published in the general-purpose allocator -- */ -- dma_cap_set(DMA_PRIVATE, device->cap_mask); -- device->privatecnt++; -- err = dma_chan_get(chan); -+ chan = find_candidate(device, mask, fn, fn_param); -+ if (!IS_ERR(chan)) -+ break; - -- if (err == -ENODEV) { -- pr_debug("%s: %s module removed\n", -- __func__, dma_chan_name(chan)); -- list_del_rcu(&device->global_node); -- } else if (err) -- pr_debug("%s: failed to get %s: (%d)\n", -- __func__, dma_chan_name(chan), err); -- else -- break; -- if (--device->privatecnt == 0) -- dma_cap_clear(DMA_PRIVATE, device->cap_mask); -- chan = NULL; -- } -+ chan = NULL; - } - mutex_unlock(&dma_list_mutex); - |