forked from luck/tmp_suning_uos_patched
max3110: Fix up port->tty backreferencing
We want to keep refcounts properly on this against hangup. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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51808f051e
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da4e40e271
@ -347,7 +347,7 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len)
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if (!port->state)
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if (!port->state)
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return 0;
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return 0;
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tty = port->state->port.tty;
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tty = tty_port_tty_get(&port->state->port);
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if (!tty)
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if (!tty)
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return 0;
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return 0;
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@ -364,8 +364,10 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len)
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}
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}
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}
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}
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if (!w)
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if (!w) {
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tty_kref_put(tty);
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return 0;
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return 0;
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}
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for (r = 0; w; r += usable, w -= usable) {
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for (r = 0; w; r += usable, w -= usable) {
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usable = tty_buffer_request_room(tty, w);
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usable = tty_buffer_request_room(tty, w);
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@ -375,6 +377,7 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len)
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}
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}
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}
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}
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tty_flip_buffer_push(tty);
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tty_flip_buffer_push(tty);
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tty_kref_put(tty);
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return r;
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return r;
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}
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}
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