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| author |   Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> | 2017-12-22 14:31:39 -0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-09 16:37:03 +0100 |
| commit | e50af488dddea7754e581d69bf978356e468845c (patch) | |
| tree | 193978b60735a8234130576da1de6688b7e2eb93 /drivers/tty/serial/jsm/jsm_neo.c | |
| parent | tty: serial: jsm: Remove unnecessary NULL checks (diff) | |
| download | linux-dev-e50af488dddea7754e581d69bf978356e468845c.tar.xz linux-dev-e50af488dddea7754e581d69bf978356e468845c.zip | |
tty: serial: jsm: Add one check against NULL pointer dereference
All calls to neo_copy_data_from_uart_to_queue() are safeguarded
against NULL dereference of its parameter, except the one that
this patch changes.
That said, let's play safe and check for NULL in this case too.
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/jsm/jsm_neo.c')
| -rw-r--r-- | drivers/tty/serial/jsm/jsm_neo.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/serial/jsm/jsm_neo.c b/drivers/tty/serial/jsm/jsm_neo.c index 6fa9a54b2454..bf0e2a4cb0ce 100644 --- a/drivers/tty/serial/jsm/jsm_neo.c +++ b/drivers/tty/serial/jsm/jsm_neo.c @@ -1172,6 +1172,9 @@ static irqreturn_t neo_intr(int irq, void *voidbrd) continue; ch = brd->channels[port]; + if (!ch) + continue; + neo_copy_data_from_uart_to_queue(ch); /* Call our tty layer to enforce queue flow control if needed. */ |