wifi: ath12k: add device DP stats reset support via debugfs

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There is no way to reset device DP stats counters without reloading
the driver, making it difficult to isolate issues to a specific time
window during debugging.

Add a write handler to the device_dp_stats debugfs file so that
writing 'reset' clears all device DP stats counters. Change the file
mode from 0400 to 0600 to allow write access. Use
simple_write_to_buffer() to correctly handle partial writes and
non-zero ppos, consistent with ath12k_write_simulate_fw_crash().

No lock is taken around the memset since the counters are updated
locklessly in the datapath; taking dp_lock would be misleading as it
does not protect device_stats updates.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.6.r1-00402-QCAHKSWPL_SILICONZ-1

Signed-off-by: Hariharan Ramanathan <hariharan.ramanathan@oss.qualcomm.com>
Co-developed-by: Pardeep Kaur <pardeep.kaur@oss.qualcomm.com>
Signed-off-by: Pardeep Kaur <pardeep.kaur@oss.qualcomm.com>
Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>
Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Link: https://patch.msgid.link/20260819053247.1420393-5-pardeep.kaur@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

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Hariharan Ramanathan 2026-08-19 11:02:43 +05:30 • committed by Jeff Johnson

parent 6fec999446

commit 26e095b080

1 changed files with 33 additions and 1 deletions

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drivers/net/wireless/ath/ath12k/debugfs.c

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