static int gdrom_readtoc_cmd()

in gdrom.c [259:295]

• 35 lines of code
• 5 McCabe index (conditional complexity)

static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session)
{
	int tocsize;
	struct packet_command *toc_command;
	int err = 0;

	toc_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
	if (!toc_command)
		return -ENOMEM;
	tocsize = sizeof(struct gdromtoc);
	toc_command->cmd[0] = 0x14;
	toc_command->cmd[1] = session;
	toc_command->cmd[3] = tocsize >> 8;
	toc_command->cmd[4] = tocsize & 0xff;
	toc_command->buflen = tocsize;
	if (gd.pending) {
		err = -EBUSY;
		goto cleanup_readtoc_final;
	}
	gd.pending = 1;
	gdrom_packetcommand(gd.cd_info, toc_command);
	wait_event_interruptible_timeout(command_queue, gd.pending == 0,
		GDROM_DEFAULT_TIMEOUT);
	if (gd.pending) {
		err = -EINVAL;
		goto cleanup_readtoc;
	}
	insw(GDROM_DATA_REG, toc, tocsize/2);
	if (gd.status & 0x01)
		err = -EINVAL;

cleanup_readtoc:
	gd.pending = 0;
cleanup_readtoc_final:
	kfree(toc_command);
	return err;
}