vfio/nvgrace-gpu: split the code to wait for GPU ready

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Split the function that check for the GPU device being ready on
the probe.

Move the code to wait for the GPU to be ready through BAR0 register
reads to a separate function. This would help reuse the code.

This also fixes a bug where the return status in case of timeout
gets overridden by return from pci_enable_device. With the fix,
a timeout generate an error as initially intended.

Fixes: d85f69d520 ("vfio/nvgrace-gpu: Check the HBM training and C2C link status")

Reviewed-by: Zhi Wang <zhiw@nvidia.com>
Reviewed-by: Shameer Kolothum <skolothumtho@nvidia.com>
Signed-off-by: Ankit Agrawal <ankita@nvidia.com>
Link: https://lore.kernel.org/r/20251127170632.3477-5-ankita@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>

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Ankit Agrawal 2025-11-27 17:06:30 +00:00 • committed by Alex Williamson

parent 7f5764e179

commit 7d055071d7

1 changed files with 18 additions and 13 deletions

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drivers/vfio/pci/nvgrace-gpu/main.c

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