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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>
hifive-unleashed-5.1
Guilherme G. Piccoli 2017-12-22 14:31:39 -02:00 committed by Greg Kroah-Hartman
parent 8ca31ba8bb
commit e50af488dd
1 changed files with 3 additions and 0 deletions
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3
drivers/tty/serial/jsm/jsm_neo.c
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@ -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. */