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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-26 11:48:42 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-26 11:48:42 -0700 |
commit | aba16dc5cf9318b4e0fe92f8261779cd9f1d2d77 (patch) | |
tree | 1f53d2cee40e82efe6a727208307af475327af9a /drivers/dma/dmaengine.c | |
parent | c4726e774ed27680c418e138234dfd2b8e1e89ac (diff) | |
parent | 1df895190233fcc30d46beca4550bcafb7b959a6 (diff) | |
download | linux-stable-aba16dc5cf9318b4e0fe92f8261779cd9f1d2d77.tar.gz linux-stable-aba16dc5cf9318b4e0fe92f8261779cd9f1d2d77.tar.bz2 linux-stable-aba16dc5cf9318b4e0fe92f8261779cd9f1d2d77.zip |
Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax
Pull IDA updates from Matthew Wilcox:
"A better IDA API:
id = ida_alloc(ida, GFP_xxx);
ida_free(ida, id);
rather than the cumbersome ida_simple_get(), ida_simple_remove().
The new IDA API is similar to ida_simple_get() but better named. The
internal restructuring of the IDA code removes the bitmap
preallocation nonsense.
I hope the net -200 lines of code is convincing"
* 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax: (29 commits)
ida: Change ida_get_new_above to return the id
ida: Remove old API
test_ida: check_ida_destroy and check_ida_alloc
test_ida: Convert check_ida_conv to new API
test_ida: Move ida_check_max
test_ida: Move ida_check_leaf
idr-test: Convert ida_check_nomem to new API
ida: Start new test_ida module
target/iscsi: Allocate session IDs from an IDA
iscsi target: fix session creation failure handling
drm/vmwgfx: Convert to new IDA API
dmaengine: Convert to new IDA API
ppc: Convert vas ID allocation to new IDA API
media: Convert entity ID allocation to new IDA API
ppc: Convert mmu context allocation to new IDA API
Convert net_namespace to new IDA API
cb710: Convert to new IDA API
rsxx: Convert to new IDA API
osd: Convert to new IDA API
sd: Convert to new IDA API
...
Diffstat (limited to 'drivers/dma/dmaengine.c')
-rw-r--r-- | drivers/dma/dmaengine.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 272bed6c8ba7..f1a441ab395d 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -161,9 +161,7 @@ static void chan_dev_release(struct device *dev) chan_dev = container_of(dev, typeof(*chan_dev), device); if (atomic_dec_and_test(chan_dev->idr_ref)) { - mutex_lock(&dma_list_mutex); - ida_remove(&dma_ida, chan_dev->dev_id); - mutex_unlock(&dma_list_mutex); + ida_free(&dma_ida, chan_dev->dev_id); kfree(chan_dev->idr_ref); } kfree(chan_dev); @@ -898,17 +896,12 @@ static bool device_has_all_tx_types(struct dma_device *device) static int get_dma_id(struct dma_device *device) { - int rc; - - do { - if (!ida_pre_get(&dma_ida, GFP_KERNEL)) - return -ENOMEM; - mutex_lock(&dma_list_mutex); - rc = ida_get_new(&dma_ida, &device->dev_id); - mutex_unlock(&dma_list_mutex); - } while (rc == -EAGAIN); + int rc = ida_alloc(&dma_ida, GFP_KERNEL); - return rc; + if (rc < 0) + return rc; + device->dev_id = rc; + return 0; } /** @@ -1092,9 +1085,7 @@ int dma_async_device_register(struct dma_device *device) err_out: /* if we never registered a channel just release the idr */ if (atomic_read(idr_ref) == 0) { - mutex_lock(&dma_list_mutex); - ida_remove(&dma_ida, device->dev_id); - mutex_unlock(&dma_list_mutex); + ida_free(&dma_ida, device->dev_id); kfree(idr_ref); return rc; } |