Instead of allocating/deallocating URBs and transfer buffers
every time stream is started/stopped, just do it once.
That reduces the memory allocation pressure and makes the
code that start/stop streaming a way simpler.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Instead of allocating transfer buffers with kmalloc() use
usb_alloc_coherent().
This patch should make it work also with ARM CPUs.
Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Use the same module version on all em28xx sub-modules, and use
the same naming convention to describe the driver.
Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Add a message with consistent prints before and after each
extension initialization, and provide a better text for module
load.
While here, add a missing sanity check for extension finish
code at em28xx-v4l extension.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Rename all USB drivers with their own directory under
drivers/media/video into drivers/media/usb and update the
building system.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
