On 2018-06-20 17:38:44 [+0200], To Takashi Iwai wrote:
> okay, as you wish:
I'm sorry, I compiled one patch and send the other. Here is the fixed
one.
> > thanks,
> >
> > Takashi
>
----------- >8
Subject: [PATCH 8/9 v4] ALSA: usx2y: usbusx2yaudio: use usb_fill_int_urb()
Using usb_fill_int_urb() helps to find code which initializes an
URB. A grep for members of the struct (like ->complete) reveal lots
of other things, too.
The "&& !(*purb)->transfer_buffer" check has been removed because the
URB has been freshly allocated a few lines above so ->transfer_buffer
has to be NULL here.
The `dev' and `transfer_size' assignments have been moved from
usX2Y_urbs_start() to usX2Y_urbs_allocate() because they don't change
overtime.
The multiplication via check_mul_overflow() has been extracted from
kmalloc_array() to avoid two multiplication (one with overflow check and
one without for the length argument). This requires to change the type
`maxpacksize' to int so there is only one type involved in the
multiplication.
Cc: Jaroslav Kysela <pe...@perex.cz>
Cc: Takashi Iwai <ti...@suse.com>
Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de>
---
sound/usb/usx2y/usbusx2yaudio.c | 23 +++++++++++------------
1 file changed, 11 insertions(+), 12 deletions(-)
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c
index 2b833054e3b0..de3a21444db3 100644
--- a/sound/usb/usx2y/usbusx2yaudio.c
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -425,6 +425,9 @@ static int usX2Y_urbs_allocate(struct snd_usX2Y_substream
*subs)
/* allocate and initialize data urbs */
for (i = 0; i < NRURBS; i++) {
struct urb **purb = subs->urb + i;
+ void *buf = NULL;
+ int len = 0;
+
if (*purb) {
usb_kill_urb(*purb);
continue;
@@ -434,22 +437,20 @@ static int usX2Y_urbs_allocate(struct snd_usX2Y_substream
*subs)
usX2Y_urbs_release(subs);
return -ENOMEM;
}
- if (!is_playback && !(*purb)->transfer_buffer) {
+
+ if (!is_playback) {
/* allocate a capture buffer per urb */
- (*purb)->transfer_buffer =
- kmalloc_array(subs->maxpacksize,
- nr_of_packs(), GFP_KERNEL);
- if (NULL == (*purb)->transfer_buffer) {
+ buf = kmalloc_array(subs->maxpacksize, nr_of_packs(),
+ GFP_KERNEL);
+ if (!buf) {
usX2Y_urbs_release(subs);
return -ENOMEM;
}
+ len = subs->maxpacksize * nr_of_packs();
}
- (*purb)->dev = dev;
- (*purb)->pipe = pipe;
+ usb_fill_int_urb(*purb, dev, pipe, buf, len,
+ i_usX2Y_subs_startup, subs, 1);
(*purb)->number_of_packets = nr_of_packs();
- (*purb)->context = subs;
- (*purb)->interval = 1;
- (*purb)->complete = i_usX2Y_subs_startup;
}
return 0;
}
@@ -485,12 +486,10 @@ static int usX2Y_urbs_start(struct snd_usX2Y_substream
*subs)
unsigned long pack;
if (0 == i)
atomic_set(&subs->state, state_STARTING3);
- urb->dev = usX2Y->dev;
for (pack = 0; pack < nr_of_packs(); pack++) {
urb->iso_frame_desc[pack].offset =
subs->maxpacksize * pack;
urb->iso_frame_desc[pack].length =
subs->maxpacksize;
}
- urb->transfer_buffer_length = subs->maxpacksize *
nr_of_packs();
if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
snd_printk (KERN_ERR "cannot submit datapipe
for urb %d, err = %d\n", i, err);
err = -EPIPE;
--
2.17.1
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