Re: [PATCH 4/5] usb: xhci: clear stale bandwidth data after hibernation

[sashiko-bot@kernel.org]

> From: Niklas Neronin <niklas.neronin@linux.intel.com>
> 
> Controllers using software managed bandwidth accounting maintain
> periodic endpoint bandwidth information in struct 'xhci_interval_bw_table'.
> 
> Each root hub port owns a bandwidth table and a list of TT bandwidth
> domains, where each TT has its own bandwidth table. Virtual devices
> reference the bandwidth table of their current bandwidth domain through
> 'bw_table' or 'tt_info'.
> 
> Historically, resume from S4 reinitialized the entire xHCI driver state,
> which implicitly cleared all bandwidth accounting data. After the
> hibernation resume path was optimized to preserve parts of the driver
> state, virtual devices and TT bandwidth information were freed and
> recreated, but the root hub bandwidth tables were left intact.
> [ ... ]
> Suggested-by: Lovekesh Solanki <lovekeshsolanki00@gmail.com>
> Tested-by: Harald Judt <h.judt@gmx.at>
> Cc: stable <stable@kernel.org>
> Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>

Sashiko has reviewed this patch and found no issues.

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Sashiko AI review · https://sashiko.dev/#/patchset/20261105175106.241182-1-mathias.nyman@linux.intel.com?part=4