serial: doc: Use port->state instead of info
As of commit ebd2c8f6d2
("serial: kill off uart_info"), the
circular transmission buffer is part of struct uart_state instead of
struct uart_info. Make it clear this structure is pointed to from struct
uart_port.
Change 'circ' to 'circ_buf' to match the structure name while we're at
it.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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@ -48,8 +48,8 @@ data:
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port->mctrl
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port->icount
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info->xmit.head (circ->head)
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info->xmit.tail (circ->tail)
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port->state->xmit.head (circ_buf->head)
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port->state->xmit.tail (circ_buf->tail)
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The low level driver is free to use this lock to provide any additional
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locking.
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@ -204,7 +204,7 @@ hardware.
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RTS nor DTR; this will have already been done via a separate
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call to set_mctrl.
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Drivers must not access port->info once this call has completed.
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Drivers must not access port->state once this call has completed.
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This method will only be called when there are no more users of
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this port.
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@ -216,7 +216,7 @@ hardware.
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Flush any write buffers, reset any DMA state and stop any
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ongoing DMA transfers.
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This will be called whenever the port->info->xmit circular
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This will be called whenever the port->state->xmit circular
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buffer is cleared.
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Locking: port->lock taken.
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