Reshuffle error handling to reduce indentation nesting
This reduce number of lines exceeding 80 characters
from 41 to 15
use:
if (error)
(return, goto, continue)
CODE
instead of:
if (good)
<CODE>
else
<EXCEPTION HANDLING>
Cc: Mike Thomas <rmthomas@xxxxxxxxxxx>
Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
---
drivers/staging/easycap/easycap_sound.c | 418 +++++++++++++++----------------
1 files changed, 205 insertions(+), 213 deletions(-)
diff --git a/drivers/staging/easycap/easycap_sound.c b/drivers/staging/easycap/easycap_sound.c
index 5829e26..0164132 100644
--- a/drivers/staging/easycap/easycap_sound.c
+++ b/drivers/staging/easycap/easycap_sound.c
@@ -142,122 +142,118 @@ easycap_alsa_complete(struct urb *purb)
strerror(purb->iso_frame_desc[i].status),
purb->iso_frame_desc[i].status);
}
- if (!purb->iso_frame_desc[i].status) {
- more = purb->iso_frame_desc[i].actual_length;
- if (!more)
- peasycap->audio_mt++;
- else {
- if (peasycap->audio_mt) {
- JOM(12, "%4i empty audio urb frames\n",
- peasycap->audio_mt);
- peasycap->audio_mt = 0;
- }
+ if (purb->iso_frame_desc[i].status == 0) {
+ JOM(12, "discarding audio samples because "
+ "%i=purb->iso_frame_desc[i].status\n",
+ purb->iso_frame_desc[i].status);
+ continue;
+ }
+ more = purb->iso_frame_desc[i].actual_length;
+ if (more == 0) {
+ peasycap->audio_mt++;
+ continue;
+ }
+ if (0 > more) {
+ SAM("MISTAKE: more is negative\n");
+ return;
+ }
- p1 = (u8 *)(purb->transfer_buffer +
- purb->iso_frame_desc[i].offset);
-
- /*
- * COPY more BYTES FROM ISOC BUFFER
- * TO THE DMA BUFFER, CONVERTING
- * 8-BIT MONO TO 16-BIT SIGNED
- * LITTLE-ENDIAN SAMPLES IF NECESSARY
- */
- while (more) {
- if (0 > more) {
- SAM("MISTAKE: more is negative\n");
- return;
- }
- much = dma_bytes - peasycap->dma_fill;
- if (0 > much) {
- SAM("MISTAKE: much is negative\n");
- return;
- }
- if (0 == much) {
- peasycap->dma_fill = 0;
- peasycap->dma_next = fragment_bytes;
- JOM(8, "wrapped dma buffer\n");
- }
- if (!peasycap->microphone) {
- if (much > more)
- much = more;
- memcpy(prt->dma_area +
- peasycap->dma_fill,
- p1, much);
- p1 += much;
- more -= much;
- } else {
+ if (peasycap->audio_mt) {
+ JOM(12, "%4i empty audio urb frames\n",
+ peasycap->audio_mt);
+ peasycap->audio_mt = 0;
+ }
+
+ p1 = (u8 *)(purb->transfer_buffer +
+ purb->iso_frame_desc[i].offset);
+
+ /*
+ * COPY more BYTES FROM ISOC BUFFER
+ * TO THE DMA BUFFER, CONVERTING
+ * 8-BIT MONO TO 16-BIT SIGNED
+ * LITTLE-ENDIAN SAMPLES IF NECESSARY
+ */
+ while (more) {
+ much = dma_bytes - peasycap->dma_fill;
+ if (0 > much) {
+ SAM("MISTAKE: much is negative\n");
+ return;
+ }
+ if (0 == much) {
+ peasycap->dma_fill = 0;
+ peasycap->dma_next = fragment_bytes;
+ JOM(8, "wrapped dma buffer\n");
+ }
+ if (!peasycap->microphone) {
+ if (much > more)
+ much = more;
+ memcpy(prt->dma_area + peasycap->dma_fill,
+ p1, much);
+ p1 += much;
+ more -= much;
+ } else {
#ifdef UPSAMPLE
- if (much % 16)
- JOM(8, "MISTAKE? much"
- " is not divisible by 16\n");
- if (much > (16 * more))
- much = 16 *
- more;
- p2 = (u8 *)(prt->dma_area + peasycap->dma_fill);
-
- for (j = 0; j < (much/16); j++) {
- newaudio = ((int) *p1) - 128;
- newaudio = 128 * newaudio;
-
- delta = (newaudio - oldaudio) / 4;
- tmp = oldaudio + delta;
-
- for (k = 0; k < 4; k++) {
- *p2 = (0x00FF & tmp);
- *(p2 + 1) = (0xFF00 & tmp) >> 8;
- p2 += 2;
- *p2 = (0x00FF & tmp);
- *(p2 + 1) = (0xFF00 & tmp) >> 8;
- p2 += 2;
- tmp += delta;
- }
- p1++;
- more--;
- oldaudio = tmp;
- }
+ if (much % 16)
+ JOM(8, "MISTAKE? much"
+ " is not divisible by 16\n");
+ if (much > (16 * more))
+ much = 16 * more;
+ p2 = (u8 *)(prt->dma_area + peasycap->dma_fill);
+
+ for (j = 0; j < (much / 16); j++) {
+ newaudio = ((int) *p1) - 128;
+ newaudio = 128 * newaudio;
+
+ delta = (newaudio - oldaudio) / 4;
+ tmp = oldaudio + delta;
+
+ for (k = 0; k < 4; k++) {
+ *p2 = (0x00FF & tmp);
+ *(p2 + 1) = (0xFF00 & tmp) >> 8;
+ p2 += 2;
+ *p2 = (0x00FF & tmp);
+ *(p2 + 1) = (0xFF00 & tmp) >> 8;
+ p2 += 2;
+ tmp += delta;
+ }
+ p1++;
+ more--;
+ oldaudio = tmp;
+ }
#else /*!UPSAMPLE*/
- if (much > (2 * more))
- much = 2 * more;
- p2 = (u8 *)(prt->dma_area + peasycap->dma_fill);
-
- for (j = 0; j < (much / 2); j++) {
- tmp = ((int) *p1) - 128;
- tmp = 128 * tmp;
- *p2 = (0x00FF & tmp);
- *(p2 + 1) = (0xFF00 & tmp) >> 8;
- p1++;
- p2 += 2;
- more--;
- }
+ if (much > (2 * more))
+ much = 2 * more;
+ p2 = (u8 *)(prt->dma_area + peasycap->dma_fill);
+
+ for (j = 0; j < (much / 2); j++) {
+ tmp = ((int) *p1) - 128;
+ tmp = 128 * tmp;
+ *p2 = (0x00FF & tmp);
+ *(p2 + 1) = (0xFF00 & tmp) >> 8;
+ p1++;
+ p2 += 2;
+ more--;
+ }
#endif /*UPSAMPLE*/
- }
- peasycap->dma_fill += much;
- if (peasycap->dma_fill >= peasycap->dma_next) {
- isfragment = peasycap->dma_fill / fragment_bytes;
- if (0 > isfragment) {
- SAM("MISTAKE: isfragment is "
- "negative\n");
- return;
- }
- peasycap->dma_read = (isfragment - 1) * fragment_bytes;
- peasycap->dma_next = (isfragment + 1) * fragment_bytes;
- if (dma_bytes < peasycap->dma_next)
- peasycap->dma_next = fragment_bytes;
-
- if (0 <= peasycap->dma_read) {
- JOM(8, "snd_pcm_period_elap"
- "sed(), %i="
- "isfragment\n",
- isfragment);
- snd_pcm_period_elapsed(pss);
- }
- }
+ }
+ peasycap->dma_fill += much;
+ if (peasycap->dma_fill >= peasycap->dma_next) {
+ isfragment = peasycap->dma_fill / fragment_bytes;
+ if (0 > isfragment) {
+ SAM("MISTAKE: isfragment is negative\n");
+ return;
+ }
+ peasycap->dma_read = (isfragment - 1) * fragment_bytes;
+ peasycap->dma_next = (isfragment + 1) * fragment_bytes;
+ if (dma_bytes < peasycap->dma_next)
+ peasycap->dma_next = fragment_bytes;
+
+ if (0 <= peasycap->dma_read) {
+ JOM(8, "snd_pcm_period_elapsed(), %i="
+ "isfragment\n", isfragment);
+ snd_pcm_period_elapsed(pss);
}
}
- } else {
- JOM(12, "discarding audio samples because "
- "%i=purb->iso_frame_desc[i].status\n",
- purb->iso_frame_desc[i].status);
}
#ifdef UPSAMPLE
@@ -271,18 +267,18 @@ easycap_alsa_complete(struct urb *purb)
*/
/*---------------------------------------------------------------------------*/
resubmit:
- if (peasycap->audio_isoc_streaming) {
- rc = usb_submit_urb(purb, GFP_ATOMIC);
- if (rc) {
- if ((-ENODEV != rc) && (-ENOENT != rc)) {
- SAM("ERROR: while %i=audio_idle, "
- "usb_submit_urb() failed "
- "with rc: -%s :%d\n", peasycap->audio_idle,
- strerror(rc), rc);
- }
- if (0 < peasycap->audio_isoc_streaming)
- (peasycap->audio_isoc_streaming)--;
+ if (peasycap->audio_isoc_streaming == 0)
+ return;
+
+ rc = usb_submit_urb(purb, GFP_ATOMIC);
+ if (rc) {
+ if ((-ENODEV != rc) && (-ENOENT != rc)) {
+ SAM("ERROR: while %i=audio_idle, usb_submit_urb failed "
+ "with rc: -%s :%d\n",
+ peasycap->audio_idle, strerror(rc), rc);
}
+ if (0 < peasycap->audio_isoc_streaming)
+ peasycap->audio_isoc_streaming--;
}
return;
}
@@ -643,10 +639,9 @@ int easycap_alsa_probe(struct easycap *peasycap)
SAM("ERROR: Cannot do ALSA snd_card_register()\n");
snd_card_free(psnd_card);
return -EFAULT;
- } else {
- ;
- SAM("registered %s\n", &psnd_card->id[0]);
}
+
+ SAM("registered %s\n", &psnd_card->id[0]);
return 0;
}
#endif /*! CONFIG_EASYCAP_OSS */
@@ -737,83 +732,79 @@ submit_audio_urbs(struct easycap *peasycap)
SAM("ERROR: peasycap->pusb_device is NULL\n");
return -EFAULT;
}
- if (!peasycap->audio_isoc_streaming) {
- JOM(4, "initial submission of all audio urbs\n");
- rc = usb_set_interface(peasycap->pusb_device,
- peasycap->audio_interface,
- peasycap->audio_altsetting_on);
- JOM(8, "usb_set_interface(.,%i,%i) returned %i\n",
- peasycap->audio_interface,
- peasycap->audio_altsetting_on, rc);
-
- isbad = 0;
- nospc = 0;
- m = 0;
- list_for_each(plist_head, (peasycap->purb_audio_head)) {
- pdata_urb = list_entry(plist_head, struct data_urb, list_head);
- if (pdata_urb) {
- purb = pdata_urb->purb;
- if (purb) {
- isbuf = pdata_urb->isbuf;
-
- purb->interval = 1;
- purb->dev = peasycap->pusb_device;
- purb->pipe = usb_rcvisocpipe(peasycap->pusb_device,
- peasycap->audio_endpointnumber);
- purb->transfer_flags = URB_ISO_ASAP;
- purb->transfer_buffer = peasycap->audio_isoc_buffer[isbuf].pgo;
- purb->transfer_buffer_length = peasycap->audio_isoc_buffer_size;
+
+ if (peasycap->audio_isoc_streaming) {
+ JOM(4, "already streaming audio urbs\n");
+ return 0;
+ }
+
+ JOM(4, "initial submission of all audio urbs\n");
+ rc = usb_set_interface(peasycap->pusb_device,
+ peasycap->audio_interface,
+ peasycap->audio_altsetting_on);
+ JOM(8, "usb_set_interface(.,%i,%i) returned %i\n",
+ peasycap->audio_interface,
+ peasycap->audio_altsetting_on, rc);
+
+ isbad = 0;
+ nospc = 0;
+ m = 0;
+ list_for_each(plist_head, peasycap->purb_audio_head) {
+ pdata_urb = list_entry(plist_head, struct data_urb, list_head);
+ if (pdata_urb && pdata_urb->purb) {
+ purb = pdata_urb->purb;
+ isbuf = pdata_urb->isbuf;
+
+ purb->interval = 1;
+ purb->dev = peasycap->pusb_device;
+ purb->pipe = usb_rcvisocpipe(peasycap->pusb_device,
+ peasycap->audio_endpointnumber);
+ purb->transfer_flags = URB_ISO_ASAP;
+ purb->transfer_buffer = peasycap->audio_isoc_buffer[isbuf].pgo;
+ purb->transfer_buffer_length = peasycap->audio_isoc_buffer_size;
#ifdef CONFIG_EASYCAP_OSS
- purb->complete = easyoss_complete;
+ purb->complete = easyoss_complete;
#else /* CONFIG_EASYCAP_OSS */
- purb->complete = easycap_alsa_complete;
+ purb->complete = easycap_alsa_complete;
#endif /* CONFIG_EASYCAP_OSS */
- purb->context = peasycap;
- purb->start_frame = 0;
- purb->number_of_packets = peasycap->audio_isoc_framesperdesc;
- for (j = 0; j < peasycap->audio_isoc_framesperdesc; j++) {
- purb->iso_frame_desc[j].offset = j * peasycap->audio_isoc_maxframesize;
- purb->iso_frame_desc[j].length = peasycap->audio_isoc_maxframesize;
- }
+ purb->context = peasycap;
+ purb->start_frame = 0;
+ purb->number_of_packets = peasycap->audio_isoc_framesperdesc;
+ for (j = 0; j < peasycap->audio_isoc_framesperdesc; j++) {
+ purb->iso_frame_desc[j].offset = j * peasycap->audio_isoc_maxframesize;
+ purb->iso_frame_desc[j].length = peasycap->audio_isoc_maxframesize;
+ }
- rc = usb_submit_urb(purb, GFP_KERNEL);
- if (rc) {
- isbad++;
- SAM("ERROR: usb_submit_urb() failed"
- " for urb with rc: -%s: %d\n",
- strerror(rc), rc);
- } else {
- m++;
- }
- } else {
- isbad++;
- }
- } else {
+ rc = usb_submit_urb(purb, GFP_KERNEL);
+ if (rc) {
isbad++;
+ SAM("ERROR: usb_submit_urb() failed"
+ " for urb with rc: -%s: %d\n",
+ strerror(rc), rc);
+ } else {
+ m++;
}
- }
- if (nospc) {
- SAM("-ENOSPC=usb_submit_urb() for %i urbs\n", nospc);
- SAM("..... possibly inadequate USB bandwidth\n");
- peasycap->audio_eof = 1;
- }
- if (isbad) {
- JOM(4, "attempting cleanup instead of submitting\n");
- list_for_each(plist_head, (peasycap->purb_audio_head)) {
- pdata_urb = list_entry(plist_head, struct data_urb, list_head);
- if (pdata_urb) {
- purb = pdata_urb->purb;
- if (purb)
- usb_kill_urb(purb);
- }
- }
- peasycap->audio_isoc_streaming = 0;
} else {
- peasycap->audio_isoc_streaming = m;
- JOM(4, "submitted %i audio urbs\n", m);
+ isbad++;
}
- } else
- JOM(4, "already streaming audio urbs\n");
+ }
+ if (nospc) {
+ SAM("-ENOSPC=usb_submit_urb() for %i urbs\n", nospc);
+ SAM("..... possibly inadequate USB bandwidth\n");
+ peasycap->audio_eof = 1;
+ }
+ if (isbad) {
+ JOM(4, "attempting cleanup instead of submitting\n");
+ list_for_each(plist_head, (peasycap->purb_audio_head)) {
+ pdata_urb = list_entry(plist_head, struct data_urb, list_head);
+ if (pdata_urb && pdata_urb->purb)
+ usb_kill_urb(pdata_urb->purb);
+ }
+ peasycap->audio_isoc_streaming = 0;
+ } else {
+ peasycap->audio_isoc_streaming = m;
+ JOM(4, "submitted %i audio urbs\n", m);
+ }
return 0;
}
@@ -834,29 +825,30 @@ kill_audio_urbs(struct easycap *peasycap)
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
- if (peasycap->audio_isoc_streaming) {
- if (peasycap->purb_audio_head) {
- peasycap->audio_isoc_streaming = 0;
- JOM(4, "killing audio urbs\n");
- m = 0;
- list_for_each(plist_head, (peasycap->purb_audio_head)) {
- pdata_urb = list_entry(plist_head, struct data_urb, list_head);
- if (pdata_urb) {
- if (pdata_urb->purb) {
- usb_kill_urb(pdata_urb->purb);
- m++;
- }
- }
- }
- JOM(4, "%i audio urbs killed\n", m);
- } else {
- SAM("ERROR: peasycap->purb_audio_head is NULL\n");
- return -EFAULT;
- }
- } else {
+
+ if (!peasycap->audio_isoc_streaming) {
JOM(8, "%i=audio_isoc_streaming, no audio urbs killed\n",
peasycap->audio_isoc_streaming);
+ return 0;
+ }
+
+ if (!peasycap->purb_audio_head) {
+ SAM("ERROR: peasycap->purb_audio_head is NULL\n");
+ return -EFAULT;
}
+
+ peasycap->audio_isoc_streaming = 0;
+ JOM(4, "killing audio urbs\n");
+ m = 0;
+ list_for_each(plist_head, (peasycap->purb_audio_head)) {
+ pdata_urb = list_entry(plist_head, struct data_urb, list_head);
+ if (pdata_urb && pdata_urb->purb) {
+ usb_kill_urb(pdata_urb->purb);
+ m++;
+ }
+ }
+ JOM(4, "%i audio urbs killed\n", m);
+
return 0;
}
/*****************************************************************************/
--
1.7.4
---------------------------------------------------------------------
Intel Israel (74) Limited
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