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authorTakashi Iwai <tiwai@suse.de>2020-02-02 10:07:24 +0100
committerTakashi Iwai <tiwai@suse.de>2020-02-02 10:08:33 +0100
commit112e3f5ac505ea0f1e3c59cc757db3c45252c41d (patch)
tree099e01cd31d44f3dfecdc5b1eb5551f50681b6e9
parent81b450909bfb4b71b4ae1c07add4feada32892bd (diff)
ALSA: hdsp: Make the firmware loading ioctl a bit more readable
The firmware loading ioctl that is implemented for hdsp hwdep device takes the reference of the address pointer, hence the current code is rather confusing. Also, due to the recent change in uapi header, sparse also complains about the cast. This patch tries to improve the readability by converting the straightforward copy_from_user of the whole struct (which contains only the pointer). Fixes: d63e63d42107 ("ALSA: hdsp: Make uapi/hdsp.h compilable again") Link: https://lore.kernel.org/r/20200202090724.18232-2-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/pci/rme9652/hdsp.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c
index ba2a47dd384c..25b3c5697343 100644
--- a/sound/pci/rme9652/hdsp.c
+++ b/sound/pci/rme9652/hdsp.c
@@ -4802,7 +4802,7 @@ static int snd_hdsp_hwdep_ioctl(struct snd_hwdep *hw, struct file *file, unsigne
break;
}
case SNDRV_HDSP_IOCTL_UPLOAD_FIRMWARE: {
- struct hdsp_firmware __user *firmware;
+ struct hdsp_firmware firmware;
u32 __user *firmware_data;
int err;
@@ -4815,10 +4815,9 @@ static int snd_hdsp_hwdep_ioctl(struct snd_hwdep *hw, struct file *file, unsigne
dev_info(hdsp->card->dev,
"initializing firmware upload\n");
- firmware = (struct hdsp_firmware __user *)argp;
-
- if (get_user(firmware_data, (__force void __user **)&firmware->firmware_data))
+ if (copy_from_user(&firmware, argp, sizeof(firmware)))
return -EFAULT;
+ firmware_data = (u32 __user *)firmware.firmware_data;
if (hdsp_check_for_iobox (hdsp))
return -EIO;