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| author | Michael Zoran <mzoran@crowfest.net> | 2016-10-30 15:55:07 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-07 13:03:14 +0300 |
| commit | 49bec49fd7f273ec114e2e533c1bb8f21a654aaf (patch) | |
| tree | 498abe008b45712e459d8c76d8eac15fa124a495 /drivers/staging/vc04_services/interface/vchiq_arm/vchiq_if.h | |
| parent | c01cc53d4eb81a626ca289d784143f22c2fe63ab (diff) | |
| download | linux-49bec49fd7f273ec114e2e533c1bb8f21a654aaf.tar.xz | |
staging: vc04_services: remove vchiq_copy_from_user
The vchiq_copy_from_user function is not portable
and is consider "bad practice." Replace this function
with a callback based mechanism that is passed downward
on the stack. When it is actually time to copy the data,
the callback is called to copy the data into the message.
This callback is provided internally for userland calls
through ioctls on the device.
NOTE: Internal clients will need to be modified to work
with the new internal API.
Test Run:
vchiq_test -p 1
vchiq_test -f 10
Both tests pass.
Internal API Changes:
Change vchi_msg_queue to:
int32_t
vchi_msg_queue(VCHI_SERVICE_HANDLE_T handle,
ssize_t (*copy_callback)(void *context, void *dest,
size_t offset, size_t maxsize),
void *context,
uint32_t data_size );
Remove:
vchi_msg_queuev_ex
vchi_msg_queuev
These functions were not implemented anyway so no need to fix them. It's
easier to just remove them.
Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/vc04_services/interface/vchiq_arm/vchiq_if.h')
| -rw-r--r-- | drivers/staging/vc04_services/interface/vchiq_arm/vchiq_if.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_if.h b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_if.h index 8067bbe7ce8d..377e8e48bb54 100644 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_if.h +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_if.h @@ -141,9 +141,12 @@ extern VCHIQ_STATUS_T vchiq_use_service(VCHIQ_SERVICE_HANDLE_T service); extern VCHIQ_STATUS_T vchiq_use_service_no_resume( VCHIQ_SERVICE_HANDLE_T service); extern VCHIQ_STATUS_T vchiq_release_service(VCHIQ_SERVICE_HANDLE_T service); - -extern VCHIQ_STATUS_T vchiq_queue_message(VCHIQ_SERVICE_HANDLE_T service, - const VCHIQ_ELEMENT_T *elements, unsigned int count); +extern VCHIQ_STATUS_T +vchiq_queue_message(VCHIQ_SERVICE_HANDLE_T handle, + ssize_t (*copy_callback)(void *context, void *dest, + size_t offset, size_t maxsize), + void *context, + size_t size); extern void vchiq_release_message(VCHIQ_SERVICE_HANDLE_T service, VCHIQ_HEADER_T *header); extern VCHIQ_STATUS_T vchiq_queue_bulk_transmit(VCHIQ_SERVICE_HANDLE_T service, |