diff options
| author | Borislav Petkov <bp@suse.de> | 2022-04-05 17:15:08 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2022-04-05 18:22:13 +0200 |
| commit | 1ef8715975de8bd481abbd0839ed4f49d9e5b0ff (patch) | |
| tree | b7f48de81d878cef45fdfc9527924967684c3384 /sound/usb/usbaudio.h | |
| parent | c9db8a30d9f091aa571b5fb7c3f434cde107b02c (diff) | |
ALSA: usb-audio: Fix undefined behavior due to shift overflowing the constant
Fix:
sound/usb/midi.c: In function ‘snd_usbmidi_out_endpoint_create’:
sound/usb/midi.c:1389:2: error: case label does not reduce to an integer constant
case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
^~~~
See https://lore.kernel.org/r/YkwQ6%2BtIH8GQpuct@zn.tnic for the gory
details as to why it triggers with older gccs only.
[ A slight correction with parentheses around the argument by tiwai ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220405151517.29753-3-bp@alien8.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/usbaudio.h')
| -rw-r--r-- | sound/usb/usbaudio.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index 167834133b9b..b8359a0aa008 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -8,7 +8,7 @@ */ /* handling of USB vendor/product ID pairs as 32-bit numbers */ -#define USB_ID(vendor, product) (((vendor) << 16) | (product)) +#define USB_ID(vendor, product) (((unsigned int)(vendor) << 16) | (product)) #define USB_ID_VENDOR(id) ((id) >> 16) #define USB_ID_PRODUCT(id) ((u16)(id)) |