Messages in this thread | | | From | Arnd Bergmann <> | Date | Tue, 26 Mar 2019 08:55:14 +0100 | Subject | Re: [BACKPORT 4.4.y 02/25] ALSA: compress: add support for 32bit calls in a 64bit kernel |
| |
On Tue, Mar 26, 2019 at 2:23 AM Greg KH <gregkh@linuxfoundation.org> wrote: > > On Fri, Mar 22, 2019 at 04:43:53PM +0100, Arnd Bergmann wrote: > > From: Ravindra Lokhande <rlokhande@nvidia.com> > > > > Compress offload does not support ioctl calls from a 32bit userspace > > in a 64 bit kernel. This patch adds support for ioctls from a 32bit > > userspace in a 64bit kernel > > > > Signed-off-by: Ravindra Lokhande <rlokhande@nvidia.com> > > Acked-by: Vinod Koul <vinod.koul@intel.com> > > Signed-off-by: Takashi Iwai <tiwai@suse.de> > > (cherry picked from commit c10368897e104c008c610915a218f0fe5fa4ec96) > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > > --- > > sound/core/compress_offload.c | 13 +++++++++++++ > > 1 file changed, 13 insertions(+) > > How is this not a "new feature"? What bug does this fix? Has this ever > worked in the past?
It has never worked in the past, but I consider it a bug for the compat layer to behave differently from native code. In this case, any 32-bit application using the SNDRV_COMPRESS_* ioctls will just fail to do anything on a 64-bit kernel at all without the trivial fix that should have been there when the driver was originally merged.
Arnd
| |