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serial: sh-sci: describe locking requirements for invalidating RXDMA

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Make sure everyone knows that calling this function needs protection.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20240506114016.30498-8-wsa+renesas@sang-engineering.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wolfram Sang 2024-05-06 13:40:18 +02:00 committed by Greg Kroah-Hartman
parent aae20f6e34
commit 8efc440549
1 changed files with 1 additions and 0 deletions
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drivers/tty/serial/sh-sci.c
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@ -1257,6 +1257,7 @@ static int sci_dma_rx_find_active(struct sci_port *s)
return -1;
}
/* Must only be called with uart_port_lock taken */
static void sci_dma_rx_chan_invalidate(struct sci_port *s)
{
unsigned int i;