usb: gadget: tegra-xudc: ACK ST_RC after clearing CTRL_RUN

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commit 59820fde00 upstream.

We identified a bug where the ST_RC bit in the status register was not
being acknowledged after clearing the CTRL_RUN bit in the control
register. This could lead to unexpected behavior in the USB gadget
drivers.

This patch resolves the issue by adding the necessary code to explicitly
acknowledge ST_RC after clearing CTRL_RUN based on the programming
sequence, ensuring proper state transition.

Fixes: 49db427232 ("usb: gadget: Add UDC driver for tegra XUSB device mode controller")
Cc: stable <stable@kernel.org>
Signed-off-by: Wayne Chang <waynec@nvidia.com>
Link: https://lore.kernel.org/r/20250418081228.1194779-1-waynec@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Wayne Chang 2025-04-18 16:12:28 +08:00 • committed by Greg Kroah-Hartman

parent 75f23e49ad

commit 43ae91f561

1 changed files with 4 additions and 0 deletions

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drivers/usb/gadget/udc/tegra-xudc.c

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