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| author | Luka Perkov <luka.perkov@sartura.hr> | 2016-06-23 13:57:21 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2016-06-23 13:57:21 +0200 |
| commit | 282b917e47d9ae5017e1e426face9b75cb7aabd0 (patch) | |
| tree | 3284ca2d20d9c8d7a4563c6446675c1ecf3feac2 /target/linux/brcm2708/patches-4.4/0202-serial-Take-care-starting-a-hung-up-tty-s-port.patch | |
| parent | 34d432b05312de6d9575c559db8209809489096d (diff) | |
| parent | 441a9c879ba6562ea9f431cf33bbb0c0400d5fd0 (diff) | |
| download | master-187ad058-282b917e47d9ae5017e1e426face9b75cb7aabd0.tar.gz master-187ad058-282b917e47d9ae5017e1e426face9b75cb7aabd0.tar.bz2 master-187ad058-282b917e47d9ae5017e1e426face9b75cb7aabd0.zip | |
Merge pull request #11 from wigyori/master
pull req for 4.4.12, ar71xx/mediatek updates, package upgrades
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0202-serial-Take-care-starting-a-hung-up-tty-s-port.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0202-serial-Take-care-starting-a-hung-up-tty-s-port.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0202-serial-Take-care-starting-a-hung-up-tty-s-port.patch b/target/linux/brcm2708/patches-4.4/0202-serial-Take-care-starting-a-hung-up-tty-s-port.patch new file mode 100644 index 0000000000..78a148bc76 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0202-serial-Take-care-starting-a-hung-up-tty-s-port.patch @@ -0,0 +1,28 @@ +From 35370cf396896477ee7e8cb044779a3ee9257a7e Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Wed, 9 Mar 2016 13:28:24 +0000 +Subject: [PATCH 202/381] serial: Take care starting a hung-up tty's port + +tty_port_hangup sets a port's tty field to NULL (holding the port lock), +but uart_tx_stopped, called from __uart_start (with the port lock), +uses the tty field without checking for NULL. + +Change uart_tx_stopped to treat a NULL tty field as another stopped +indication. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + include/linux/serial_core.h | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/include/linux/serial_core.h ++++ b/include/linux/serial_core.h +@@ -397,7 +397,7 @@ int uart_resume_port(struct uart_driver + static inline int uart_tx_stopped(struct uart_port *port) + { + struct tty_struct *tty = port->state->port.tty; +- if (tty->stopped || port->hw_stopped) ++ if (!tty || tty->stopped || port->hw_stopped) + return 1; + return 0; + } |