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authorNiklas Neronin <niklas.neronin@linux.intel.com>2025-05-15 16:56:14 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2025-05-21 12:35:33 +0200
commite1db856bd28891d70008880d7f1d3b8d1ea948fd (patch)
treee3626dc8971db67e243cfa87b4afa345c5377a6e /tools/perf/scripts/python/call-graph-from-postgresql.py
parentf5bce30ad25e74899c54dda01c80ca6e2e7dc01b (diff)
usb: xhci: remove '0' write to write-1-to-clear register
xHCI specification 1.2, section 5.5.2.1. Interrupt Pending bit is RW1C (Write-1-to-clear), which means that writing '0' to is has no effect and is removed. The Interrupt Pending (IP) bit is cleared at the start of interrupt handling; xhci_clear_interrupt_pending(). This could theoretically cause a new interrupt to be issued before the xhci driver reaches the interrupter disable functions. To address this, the IP bit is read after Interrupt Enable is disabled, and a debug message is issued if the IP bit is still set. Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Link: https://lore.kernel.org/r/20250515135621.335595-18-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
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