From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Erwan Le Ray <erwan.leray@foss.st.com>,
Valentin Caron <valentin.caron@foss.st.com>
Subject: [PATCH 4.4 08/25] serial: stm32: fix software flow control transfer
Date: Tue, 1 Feb 2022 19:16:32 +0100 [thread overview]
Message-ID: <20220201180822.426450929@linuxfoundation.org> (raw)
In-Reply-To: <20220201180822.148370751@linuxfoundation.org>
From: Valentin Caron <valentin.caron@foss.st.com>
commit 037b91ec7729524107982e36ec4b40f9b174f7a2 upstream.
x_char is ignored by stm32_usart_start_tx() when xmit buffer is empty.
Fix start_tx condition to allow x_char to be sent.
Fixes: 48a6092fb41f ("serial: stm32-usart: Add STM32 USART Driver")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20220111164441.6178-3-valentin.caron@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/stm32-usart.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -279,7 +279,7 @@ static void stm32_start_tx(struct uart_p
{
struct circ_buf *xmit = &port->state->xmit;
- if (uart_circ_empty(xmit))
+ if (uart_circ_empty(xmit) && !port->x_char)
return;
stm32_set_bits(port, USART_CR1, USART_CR1_TXEIE | USART_CR1_TE);
next prev parent reply other threads:[~2022-02-01 18:18 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-01 18:16 [PATCH 4.4 00/25] 4.4.302-rc1 review Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 01/25] can: bcm: fix UAF of bcm op Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 02/25] Bluetooth: refactor malicious adv data check Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 03/25] s390/hypfs: include z/VM guests with access control group set Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 04/25] scsi: zfcp: Fix failed recovery on gone remote port with non-NPIV FCP devices Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 05/25] udf: Restore i_lenAlloc when inode expansion fails Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 06/25] udf: Fix NULL ptr deref when converting from inline format Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 07/25] PM: wakeup: simplify the output logic of pm_show_wakelocks() Greg Kroah-Hartman
2022-02-01 18:16 ` Greg Kroah-Hartman [this message]
2022-02-01 18:16 ` [PATCH 4.4 09/25] tty: n_gsm: fix SW flow control encoding/handling Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 10/25] tty: Add support for Brainboxes UC cards Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 11/25] usb-storage: Add unusual-devs entry for VL817 USB-SATA bridge Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 12/25] USB: core: Fix hang in usb_kill_urb by adding memory barriers Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 13/25] scsi: bnx2fc: Flush destroy_work queue before calling bnx2fc_interface_put() Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 14/25] ipv6_tunnel: Rate limit warning messages Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 15/25] net: fix information leakage in /proc/net/ptype Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 16/25] ipv4: avoid using shared IP generator for connected sockets Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 17/25] net-procfs: show net devices bound packet types Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 18/25] drm/msm: Fix wrong size calculation Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 19/25] hwmon: (lm90) Reduce maximum conversion rate for G781 Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 20/25] ipv4: raw: lock the socket in raw_bind() Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 21/25] ipv4: tcp: send zero IPID in SYNACK messages Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 22/25] Bluetooth: MGMT: Fix misplaced BT_HS check Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 23/25] Revert "drm/radeon/ci: disable mclk switching for high refresh rates (v2)" Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 24/25] Revert "tc358743: fix register i2c_rd/wr function fix" Greg Kroah-Hartman
2022-02-01 18:16 ` [PATCH 4.4 25/25] KVM: x86: Fix misplaced backport of "work around leak of uninitialized stack contents" Greg Kroah-Hartman
2022-02-01 19:46 ` [PATCH 4.4 00/25] 4.4.302-rc1 review Shuah Khan
2022-02-01 20:51 ` Shuah Khan
2022-02-01 20:54 ` Pavel Machek
2022-02-01 21:24 ` Guenter Roeck
2022-02-01 22:25 ` Shuah Khan
2022-02-02 8:02 ` Naresh Kamboju
2022-02-02 12:18 ` Slade Watkins
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