static int gdrom_getsense()

in gdrom.c [412:457]

• 42 lines of code
• 9 McCabe index (conditional complexity)

static int gdrom_getsense(short *bufstring)
{
	struct packet_command *sense_command;
	short sense[5];
	int sense_key;
	int err = -EIO;

	sense_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
	if (!sense_command)
		return -ENOMEM;
	sense_command->cmd[0] = 0x13;
	sense_command->cmd[4] = 10;
	sense_command->buflen = 10;
	/* even if something is pending try to get
	* the sense key if possible */
	if (gd.pending && !gdrom_wait_clrbusy()) {
		err = -EBUSY;
		goto cleanup_sense_final;
	}
	gd.pending = 1;
	gdrom_packetcommand(gd.cd_info, sense_command);
	wait_event_interruptible_timeout(command_queue, gd.pending == 0,
		GDROM_DEFAULT_TIMEOUT);
	if (gd.pending)
		goto cleanup_sense;
	insw(GDROM_DATA_REG, &sense, sense_command->buflen/2);
	if (sense[1] & 40) {
		pr_info("Drive not ready - command aborted\n");
		goto cleanup_sense;
	}
	sense_key = sense[1] & 0x0F;
	if (sense_key < ARRAY_SIZE(sense_texts))
		pr_info("%s\n", sense_texts[sense_key].text);
	else
		pr_err("Unknown sense key: %d\n", sense_key);
	if (bufstring) /* return addional sense data */
		memcpy(bufstring, &sense[4], 2);
	if (sense_key < 2)
		err = 0;

cleanup_sense:
	gd.pending = 0;
cleanup_sense_final:
	kfree(sense_command);
	return err;
}