diff options
| author | Orson Zhai <[email protected]> | 2021-03-19 06:15:35 +0000 |
|---|---|---|
| committer | Jassi Brar <[email protected]> | 2021-04-14 01:07:36 +0000 |
| commit | 9468ab84032f96496e998cfa173cd1d0ac316bcd (patch) | |
| tree | f0eef478843d37166e380b32c061c0904f6aea86 /drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | |
| parent | MAINTAINERS: Add DT bindings directory to mailbox (diff) | |
| download | kernel-9468ab84032f96496e998cfa173cd1d0ac316bcd.tar.gz kernel-9468ab84032f96496e998cfa173cd1d0ac316bcd.zip | |
mailbox: sprd: Introduce refcnt when clients requests/free channels
Unisoc mailbox has no way to be enabled/disabled for any single channel.
They can only be set to startup or shutdown as a whole device at same time.
Add a variable to count references to avoid mailbox FIFO being reset
unexpectedly when clients are requesting or freeing channels.
Also add a lock to dismiss possible conflicts from register r/w in
different startup or shutdown threads. And fix the crash problem when early
interrupts come from channel which has not been requested by client yet.
Fixes: ca27fc26cd22 ("mailbox: sprd: Add Spreadtrum mailbox driver")
Signed-off-by: Orson Zhai <[email protected]>
Reviewed-by: Baolin Wang <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c')
0 files changed, 0 insertions, 0 deletions