[PATCH v4 3/8] gpu: nova-core: split BAR acquisition in unbind()

[Alexandre Courbot <acourbot@nvidia.com>]

We are going to use the BAR to perform other teardown tasks, so move its
acquisition into a dedicated code block with a more meaningful error
message.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
 drivers/gpu/nova-core/gpu.rs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/nova-core/gpu.rs b/drivers/gpu/nova-core/gpu.rs
index 233a4bcec9fc..920783362251 100644
--- a/drivers/gpu/nova-core/gpu.rs
+++ b/drivers/gpu/nova-core/gpu.rs
@@ -319,10 +319,11 @@ pub(crate) fn new<'a>(
     ///
     /// Note: This method must only be called from `Driver::unbind`.
     pub(crate) fn unbind(&self, dev: &device::Device<device::Core>) {
-        kernel::warn_on!(self
-            .bar
-            .access(dev)
-            .inspect(|bar| self.sysmem_flush.unregister(bar))
-            .is_err());
+        let Ok(bar) = self.bar.access(dev) else {
+            dev_err!(dev, "failed to acquire bar for driver unbinding\n");
+            return;
+        };
+
+        self.sysmem_flush.unregister(bar);
     }
 }

-- 
2.54.0