diff options
| author | Orson Zhai <orson.zhai@unisoc.com> | 2021-03-19 14:15:35 +0800 |
|---|---|---|
| committer | Jassi Brar <jaswinder.singh@linaro.org> | 2021-04-13 20:07:36 -0500 |
| commit | 9468ab84032f96496e998cfa173cd1d0ac316bcd (patch) | |
| tree | f0eef478843d37166e380b32c061c0904f6aea86 /kernel/bpf/arraymap.c | |
| parent | a8f96891077ec0a2226904fd84e36d2398d79cb4 (diff) | |
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 <orson.zhai@unisoc.com>
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'kernel/bpf/arraymap.c')
0 files changed, 0 insertions, 0 deletions