diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-09-29 01:52:40 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-09-29 01:52:40 +0200 |
commit | bcabc6f32888435932364702ebf368164dea6678 (patch) | |
tree | 34e88561ca4acf1b663e972ea48e7f3e3f4c9efc /drivers/staging/android | |
parent | 60d6a21b1ec25629e93f11464fae3b2045c3370f (diff) | |
parent | 9ffecb10283508260936b96022d4ee43a7798b4c (diff) | |
download | linux-bcabc6f32888435932364702ebf368164dea6678.tar.bz2 |
Merge 4.3-rc3 into staging-next
We want the staging fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/android')
-rw-r--r-- | drivers/staging/android/TODO | 20 | ||||
-rw-r--r-- | drivers/staging/android/ion/ion.c | 6 |
2 files changed, 23 insertions, 3 deletions
diff --git a/drivers/staging/android/TODO b/drivers/staging/android/TODO index 20288fc53946..8f3ac37bfe12 100644 --- a/drivers/staging/android/TODO +++ b/drivers/staging/android/TODO @@ -5,5 +5,25 @@ TODO: - add proper arch dependencies as needed - audit userspace interfaces to make sure they are sane + +ion/ + - Remove ION_IOC_SYNC: Flushing for devices should be purely a kernel internal + interface on top of dma-buf. flush_for_device needs to be added to dma-buf + first. + - Remove ION_IOC_CUSTOM: Atm used for cache flushing for cpu access in some + vendor trees. Should be replaced with an ioctl on the dma-buf to expose the + begin/end_cpu_access hooks to userspace. + - Clarify the tricks ion plays with explicitly managing coherency behind the + dma api's back (this is absolutely needed for high-perf gpu drivers): Add an + explicit coherency management mode to flush_for_device to be used by drivers + which want to manage caches themselves and which indicates whether cpu caches + need flushing. + - With those removed there's probably no use for ION_IOC_IMPORT anymore either + since ion would just be the central allocator for shared buffers. + - Add dt-binding to expose cma regions as ion heaps, with the rule that any + such cma regions must already be used by some device for dma. I.e. ion only + exposes existing cma regions and doesn't reserve unecessarily memory when + booting a system which doesn't use ion. + Please send patches to Greg Kroah-Hartman <greg@kroah.com> and Cc: Arve Hjønnevåg <arve@android.com> and Riley Andrews <riandrews@android.com> diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index 217aa537c4eb..6e8d8392ca38 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -1179,13 +1179,13 @@ struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd) mutex_unlock(&client->lock); goto end; } - mutex_unlock(&client->lock); handle = ion_handle_create(client, buffer); - if (IS_ERR(handle)) + if (IS_ERR(handle)) { + mutex_unlock(&client->lock); goto end; + } - mutex_lock(&client->lock); ret = ion_handle_add(client, handle); mutex_unlock(&client->lock); if (ret) { |