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[v2,2/3] serial: core: introduce uart_port_tx_limited_flags()

Message ID 20240606195632.173255-3-doug@schmorgal.com
State New
Headers show
Series serial: Fix regression in omap-serial and pxa | expand

Commit Message

Doug Brown June 6, 2024, 7:56 p.m. UTC 
From: Jonas Gorski <jonas.gorski@gmail.com>

Analogue to uart_port_tx_flags() introduced in commit 3ee07964d407
("serial: core: introduce uart_port_tx_flags()"), add a _flags variant
for uart_port_tx_limited().

Fixes: d11cc8c3c4b6 ("tty: serial: use uart_port_tx_limited()")
Cc: stable@vger.kernel.org
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Doug Brown <doug@schmorgal.com>
---
 include/linux/serial_core.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
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Patch

diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 3fb9a29e025f..aea25eef9a1a 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -850,6 +850,24 @@  enum UART_TX_FLAGS {
 			__count--);					      \
 })
 
+/**
+ * uart_port_tx_limited_flags -- transmit helper for uart_port with count limiting with flags
+ * @port: uart port
+ * @ch: variable to store a character to be written to the HW
+ * @flags: %UART_TX_NOSTOP or similar
+ * @count: a limit of characters to send
+ * @tx_ready: can HW accept more data function
+ * @put_char: function to write a character
+ * @tx_done: function to call after the loop is done
+ *
+ * See uart_port_tx_limited() for more details.
+ */
+#define uart_port_tx_limited_flags(port, ch, flags, count, tx_ready, put_char, tx_done) ({ \
+	unsigned int __count = (count);							   \
+	__uart_port_tx(port, ch, flags, tx_ready, put_char, tx_done, __count,		   \
+			__count--);							   \
+})
+
 /**
  * uart_port_tx -- transmit helper for uart_port
  * @port: uart port