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drm/xe/oa: Ensure that polled read returns latest data
In polled mode, user calls poll() for read data to be available before performing a read(). In the duration between these 2 calls, there may be new data available in the OA buffer. To ensure user reads all available data, check for latest data in the OA buffer in polled read. Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com> Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20250212010255.1423343-1-umesh.nerlige.ramappa@intel.com
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