xhci: simplify and rework trb_in_td()

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The trb_in_td() checking is quite complex, especially when checking for
TRBs in ranges that can span several segments.

Simplify the search by creating a position index for each TRB on the
ring, and just compare the position indexes.
Add a more generic dma_in_range() helper that checks if a trb dma
address is in the range between a start and end trb and call it from
trb_in_td()

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20251119142417.2820519-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Mathias Nyman 2025-11-19 16:23:57 +02:00 • committed by Greg Kroah-Hartman

parent fad902d670

commit 86dcf43be8

1 changed files with 28 additions and 44 deletions

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drivers/usb/host/xhci-ring.c

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