[PATCH 2/3] ALSA: rme9652: Improve eight size determinations

[SF Markus Elfring]

From: Markus Elfring <elfr...@users.sourceforge.net>
Date: Sat, 12 Aug 2017 16:50:06 +0200

Replace the specification of data structures by variable references
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

Signed-off-by: Markus Elfring <elfr...@users.sourceforge.net>
---
 sound/pci/rme9652/hdspm.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index d448cf474c1b..8d339fb7c24b 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -6221,7 +6221,7 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, 
struct file *file,
                }
                levels->status2 = hdspm_read(hdspm, HDSPM_statusRegister2);
 
-               s = copy_to_user(argp, levels, sizeof(struct hdspm_peak_rms));
+               s = copy_to_user(argp, levels, sizeof(*levels));
                if (0 != s) {
                        /* dev_err(hdspm->card->dev, "copy_to_user(.., .., 
%lu): %lu
                         [Levels]\n", sizeof(struct hdspm_peak_rms), s);
@@ -6266,7 +6266,7 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, 
struct file *file,
                        ltc.input_format = no_video;
                }
 
-               s = copy_to_user(argp, &ltc, sizeof(struct hdspm_ltc));
+               s = copy_to_user(argp, &ltc, sizeof(ltc));
                if (0 != s) {
                        /*
                          dev_err(hdspm->card->dev, "copy_to_user(.., .., %lu): 
%lu [LTC]\n", sizeof(struct hdspm_ltc), s); */
@@ -6357,7 +6357,7 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, 
struct file *file,
                if (copy_from_user(&mixer, argp, sizeof(mixer)))
                        return -EFAULT;
                if (copy_to_user((void __user *)mixer.mixer, hdspm->mixer,
-                                       sizeof(struct hdspm_mixer)))
+                                sizeof(*mixer.mixer)))
                        return -EFAULT;
                break;
 
@@ -6636,8 +6636,8 @@ static int snd_hdspm_create(struct snd_card *card,
        hdspm->irq = pci->irq;
 
        dev_dbg(card->dev, "kmalloc Mixer memory of %zd Bytes\n",
-                       sizeof(struct hdspm_mixer));
-       hdspm->mixer = kzalloc(sizeof(struct hdspm_mixer), GFP_KERNEL);
+               sizeof(*hdspm->mixer));
+       hdspm->mixer = kzalloc(sizeof(*hdspm->mixer), GFP_KERNEL);
        if (!hdspm->mixer)
                return -ENOMEM;
 
@@ -6774,8 +6774,7 @@ static int snd_hdspm_create(struct snd_card *card,
                if (hdspm_read(hdspm, HDSPM_statusRegister2) &
                                HDSPM_s2_tco_detect) {
                        hdspm->midiPorts++;
-                       hdspm->tco = kzalloc(sizeof(struct hdspm_tco),
-                                       GFP_KERNEL);
+                       hdspm->tco = kzalloc(sizeof(*hdspm->tco), GFP_KERNEL);
                        if (NULL != hdspm->tco) {
                                hdspm_tco_write(hdspm);
                        }
@@ -6789,8 +6788,7 @@ static int snd_hdspm_create(struct snd_card *card,
        case AES32:
                if (hdspm_read(hdspm, HDSPM_statusRegister) & HDSPM_tco_detect) 
{
                        hdspm->midiPorts++;
-                       hdspm->tco = kzalloc(sizeof(struct hdspm_tco),
-                                       GFP_KERNEL);
+                       hdspm->tco = kzalloc(sizeof(*hdspm->tco), GFP_KERNEL);
                        if (NULL != hdspm->tco) {
                                hdspm_tco_write(hdspm);
                        }
@@ -6941,7 +6939,7 @@ static int snd_hdspm_probe(struct pci_dev *pci,
        }
 
        err = snd_card_new(&pci->dev, index[dev], id[dev],
-                          THIS_MODULE, sizeof(struct hdspm), &card);
+                          THIS_MODULE, sizeof(*hdspm), &card);
        if (err < 0)
                return err;
 
-- 
2.14.0