[PATCH v6 10/13] gpu: nova-core: avoid repeated calls to pci::Device::as_ref

[Alexandre Courbot]

Add a local `Device` reference created from the `pci::Device` in the
`Gpu` constructor to avoid repeatedly calling `as_ref`.

Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
Reviewed-by: Eliot Courtney <ecourtney@xxxxxxxxxx>
---
 drivers/gpu/nova-core/gpu.rs | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/nova-core/gpu.rs b/drivers/gpu/nova-core/gpu.rs
index c04706b60ba8..fc90069bc2fe 100644
--- a/drivers/gpu/nova-core/gpu.rs
+++ b/drivers/gpu/nova-core/gpu.rs
@@ -317,9 +317,11 @@ pub(crate) fn new(
         pdev: &'gpu pci::Device<device::Core<'_>>,
         bar: Bar0<'gpu>,
     ) -> impl PinInit<Self, Error> + 'gpu {
+        let dev = pdev.as_ref();
+
         try_pin_init!(Self {
-            spec: Spec::new(pdev.as_ref(), bar).inspect(|spec| {
-                dev_info!(pdev,"NVIDIA ({})\n", spec);
+            spec: Spec::new(dev, bar).inspect(|spec| {
+                dev_info!(dev,"NVIDIA ({})\n", spec);
             })?,
 
             // We must wait for GFW_BOOT completion before doing any significant setup on the GPU.
@@ -332,11 +334,11 @@ pub(crate) fn new(
                 unsafe { pdev.dma_set_mask_and_coherent(dma_mask)? };
 
                 hal.wait_gfw_boot_completion(bar)
-                    .inspect_err(|_| dev_err!(pdev, "GFW boot did not complete\n"))?;
+                    .inspect_err(|_| dev_err!(dev, "GFW boot did not complete\n"))?;
             },
 
             // Initialize this early because `gsp_resources` depends on it.
-            sysmem_flush: SysmemFlush::register(pdev.as_ref(), bar, spec.chipset)?,
+            sysmem_flush: SysmemFlush::register(dev, bar, spec.chipset)?,
 
             gsp_resources <- try_pin_init!(GspResources {
                 device: pdev,
@@ -346,13 +348,13 @@ pub(crate) fn new(
                 bar,
 
                 gsp_falcon: Falcon::new(
-                    pdev.as_ref(),
+                    dev,
                     spec.chipset,
                     bar
                 )
                 .inspect(|falcon| falcon.clear_swgen0_intr())?,
 
-                sec2_falcon: Falcon::new(pdev.as_ref(), spec.chipset, bar)?,
+                sec2_falcon: Falcon::new(dev, spec.chipset, bar)?,
 
                 gsp <- Gsp::new(pdev),
 
@@ -372,18 +374,18 @@ pub(crate) fn new(
                 // Obtain and display basic GPU information.
                 let info = gsp_resources.gsp.get_static_info(bar)?;
                 match info.gpu_name() {
-                    Ok(name) => dev_info!(pdev, "GPU name: {}\n", name),
-                    Err(e) => dev_warn!(pdev, "GPU name unavailable: {:?}\n", e),
+                    Ok(name) => dev_info!(dev, "GPU name: {}\n", name),
+                    Err(e) => dev_warn!(dev, "GPU name unavailable: {:?}\n", e),
                 }
 
                 if !info.usable_fb_regions.is_empty() {
-                    dev_dbg!(pdev, "Usable FB regions:\n");
+                    dev_dbg!(dev, "Usable FB regions:\n");
                     for region in &info.usable_fb_regions {
-                        dev_dbg!(pdev, "  - {:#x?}\n", region);
+                        dev_dbg!(dev, "  - {:#x?}\n", region);
                     }
 
                     dev_dbg!(
-                        pdev,
+                        dev,
                         "Total usable VRAM: {} MiB\n",
                         info.usable_fb_regions.iter().fold(0u64, |res, region| res
                             .saturating_add(region.end - region.start))

-- 
2.55.0