[PATCH v2 1/2] gpu: nova-core: gsp: cmdq: wrap the sequence number on overflow

[Eliot Courtney]

The sequence number can (eventually) overflow, in which case we should
just wrap it around.

Fixes: 75f6b1de8133 ("gpu: nova-core: gsp: Add GSP command queue bindings and handling")
Reviewed-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
Signed-off-by: Eliot Courtney <ecourtney@xxxxxxxxxx>
---
 drivers/gpu/nova-core/gsp/cmdq.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/nova-core/gsp/cmdq.rs b/drivers/gpu/nova-core/gsp/cmdq.rs
index 5f3de456042e..33074bb53e8c 100644
--- a/drivers/gpu/nova-core/gsp/cmdq.rs
+++ b/drivers/gpu/nova-core/gsp/cmdq.rs
@@ -578,7 +578,7 @@ fn send_command_element<E: CommandElement>(&mut self, command: E) -> Result<u32>
 
         // All set - update the write pointer and inform the GSP of the new command.
         let elem_count = dst.header.element_count();
-        self.seq += 1;
+        self.seq = self.seq.wrapping_add(1);
         self.gsp_mem.advance_cpu_write_ptr(elem_count);
 
         Ok(seq)

-- 
2.56.0