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| author | Jiri Slaby <jslaby@suse.cz> | 2022-09-27 13:18:19 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-30 14:58:46 +0200 |
| commit | 12f3a5eba3c4eb0031d7db36773579e517459a41 (patch) | |
| tree | f1d8bafa2e129938bb337684d69d6a94c91bac8a /drivers/tty | |
| parent | 523f54ed3be7e23340b1c43921e39fddfe149c09 (diff) | |
| download | linux-rpi-12f3a5eba3c4eb0031d7db36773579e517459a41.tar.gz linux-rpi-12f3a5eba3c4eb0031d7db36773579e517459a41.tar.bz2 linux-rpi-12f3a5eba3c4eb0031d7db36773579e517459a41.zip | |
tty: serial: do unlock on a common path in altera_jtaguart_console_putc()
port->lock is unlocked in each branch in altera_jtaguart_console_putc(),
so do it before the "if". "status" needs not be under the lock, as the
register was already read.
Cc: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Link: https://lore.kernel.org/r/20220927111819.18516-4-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/altera_jtaguart.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/tty/serial/altera_jtaguart.c b/drivers/tty/serial/altera_jtaguart.c index ac8ce418de36..c2d154d78e54 100644 --- a/drivers/tty/serial/altera_jtaguart.c +++ b/drivers/tty/serial/altera_jtaguart.c @@ -310,11 +310,12 @@ static void altera_jtaguart_console_putc(struct uart_port *port, unsigned char c spin_lock_irqsave(&port->lock, flags); while (!altera_jtaguart_tx_space(port, &status)) { + spin_unlock_irqrestore(&port->lock, flags); + if ((status & ALTERA_JTAGUART_CONTROL_AC_MSK) == 0) { - spin_unlock_irqrestore(&port->lock, flags); return; /* no connection activity */ } - spin_unlock_irqrestore(&port->lock, flags); + cpu_relax(); spin_lock_irqsave(&port->lock, flags); } |