ALSA: hdsp: check for iobox and upload firmware during ioctl

currently, the error message when trying to run hdspmixer or hdspconf
if the breakout box is not connected is somehow misleading, since it
asks the user to upload the firmware.

this patch adds a test, whether the breakout box is connected and
tries to upload the firmware in the case, that it is not present, e.g.
because of power failures of the breakout box.

[Minor coding-style fixes by tiwai]
Signed-off-by: Tim Blechmann <tim@klingt.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/rme9652/hdsp.c

@@ -4548,11 +4548,20 @@ static int snd_hdsp_hwdep_ioctl(struct snd_hwdep *hw, struct file *file, unsigne
 {
 	struct hdsp *hdsp = (struct hdsp *)hw->private_data;	
 	void __user *argp = (void __user *)arg;
+	int err;
 
 	switch (cmd) {
 	case SNDRV_HDSP_IOCTL_GET_PEAK_RMS: {
 		struct hdsp_peak_rms __user *peak_rms = (struct hdsp_peak_rms __user *)arg;
 
+		err = hdsp_check_for_iobox(hdsp);
+		if (err < 0)
+			return err;
+
+		err = hdsp_check_for_firmware(hdsp, 1);
+		if (err < 0)
+			return err;
+
 		if (!(hdsp->state & HDSP_FirmwareLoaded)) {
 			snd_printk(KERN_ERR "Hammerfall-DSP: firmware needs to be uploaded to the card.\n");
 			return -EINVAL;
@@ -4572,10 +4581,14 @@ static int snd_hdsp_hwdep_ioctl(struct snd_hwdep *hw, struct file *file, unsigne
 		unsigned long flags;
 		int i;
 		
-		if (!(hdsp->state & HDSP_FirmwareLoaded)) {
-			snd_printk(KERN_ERR "Hammerfall-DSP: Firmware needs to be uploaded to the card.\n");	
-			return -EINVAL;
-		}
+		err = hdsp_check_for_iobox(hdsp);
+		if (err < 0)
+			return err;
+
+		err = hdsp_check_for_firmware(hdsp, 1);
+		if (err < 0)
+			return err;
+
 		spin_lock_irqsave(&hdsp->lock, flags);
 		info.pref_sync_ref = (unsigned char)hdsp_pref_sync_ref(hdsp);
 		info.wordclock_sync_check = (unsigned char)hdsp_wc_sync_check(hdsp);