usb: dwc3: gadget: Skip reading GEVNTSIZn

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The driver knows what it needs to set for GEVNTSIZn, and the controller
doesn't modify this register unless there's a hard reset. To save a few
microseconds of register read in read-modify-write operation, simply do
register write with the expected values. This can improve performance
when there are many interrupts generated, which the driver needs to
check and handle.

Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/efddf4ee5821c4bc5ae7ad90d629ec7a0ebcbf9a.1638240306.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Thinh Nguyen 2021-11-29 18:53:22 -08:00 • committed by Greg Kroah-Hartman

parent a02a26eb0a

commit 76c4c95dac

1 changed files with 4 additions and 8 deletions

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drivers/usb/dwc3/gadget.c

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