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Commit e7e664fd authored by Samuel Iglesias Gonsalvez's avatar Samuel Iglesias Gonsalvez Committed by Greg Kroah-Hartman
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ipack/devices/ipoctal: protect the channel data processing with a spinlock 



We protect important data such as TX buffer pointer, nb_bytes counter and status
registers of the device, from accessing several times at the same time.

Signed-off-by: default avatarSamuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 21d27ed4

drivers/ipack/devices/ipoctal.c

+3 −0
Original line number Diff line number Diff line
@@ -191,6 +191,8 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel) 
	tty = tty_port_tty_get(&channel->tty_port);

	if (!tty)

		return;



	spin_lock(&channel->lock);

	/* The HW is organized in pair of channels.  See which register we need

	 * to read from */

	isr = ioread8(&channel->block_regs->r.isr);
@@ -216,6 +218,7 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel) 


	tty_flip_buffer_push(tty);

	tty_kref_put(tty);

	spin_unlock(&channel->lock);

}



static irqreturn_t ipoctal_irq_handler(void *arg)