mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-15 15:15:47 +00:00
thunderbolt: Check for ring 0 in tb_tunnel_alloc_dma()
Ring 0 cannot be used for anything else than control channel messages. For this reason add a check to tb_tunnel_alloc_dma() and fail if someone tries to do that. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
parent
44c026a73b
commit
814c96c959
1 changed files with 4 additions and 0 deletions
|
@ -1452,6 +1452,10 @@ struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi,
|
|||
struct tb_path *path;
|
||||
int credits;
|
||||
|
||||
/* Ring 0 is reserved for control channel */
|
||||
if (WARN_ON(!receive_ring || !transmit_ring))
|
||||
return NULL;
|
||||
|
||||
if (receive_ring > 0)
|
||||
npaths++;
|
||||
if (transmit_ring > 0)
|
||||
|
|
Loading…
Reference in a new issue