Shyam Sundar S K b136225746 platform/x86/amd/pmc: Handle overflow cases where the num_samples range is higher ... In amd_pmc_stb_debugfs_open_v2(), the stb buffer is created based on the num_samples and the read/write pointer offset. This holds good when the num_samples reported by PMFW is less than S2D_TELEMETRY_BYTES_MAX; where the stb buffer gets filled from 0th position until S2D_TELEMETRY_BYTES_MAX - 1 based on the read/write pointer offset. But when the num_samples exceeds the S2D_TELEMETRY_BYTES_MAX, the current code does not handle it well as it does not account for the cases where the stb buffer has to filled up as a circular buffer. Handle this scenario into two cases, where first memcpy will have the samples from location: (num_samples % S2D_TELEMETRY_BYTES_MAX) - (S2D_TELEMETRY_BYTES_MAX - 1) and next memcpy will have the newest ones i.e. 0 - (num_samples % S2D_TELEMETRY_BYTES_MAX - 1) Suggested-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> Link: https://lore.kernel.org/r/20231010145003.139932-2-Shyam-sundar.S-k@amd.com [ij: renamed flex_arr -> stb_data_arr] Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>		2023-10-12 16:55:31 +03:00
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Kconfig
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pmc-quirks.c
pmc.c	platform/x86/amd/pmc: Handle overflow cases where the num_samples range is higher	2023-10-12 16:55:31 +03:00
pmc.h