From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Sun, 25 Dec 2016 09:40:21 +0100
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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The script "checkpatch.pl" pointed information out like the following.
Comparison to NULL could be written …
Thus fix the affected source code places.
Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/media/usb/uvc/uvc_driver.c | 54 +++++++++++++++++++-------------------
1 file changed, 27 insertions(+), 27 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index bddaf98ef828..32d39404c1cb 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -254,7 +254,7 @@ void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
unsigned int i, n;
an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL);
- if (an == NULL)
+ if (!an)
return;
/* Convert the fraction to a simple continued fraction. See
@@ -340,7 +340,7 @@ static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
{
unsigned int i;
- if (entity == NULL)
+ if (!entity)
entity = list_entry(&dev->entities, struct uvc_entity, list);
list_for_each_entry_continue(entity, &dev->entities, list) {
@@ -400,7 +400,7 @@ static int uvc_parse_format(struct uvc_device *dev,
/* Find the format descriptor from its GUID. */
fmtdesc = uvc_format_by_guid(&buffer[5]);
- if (fmtdesc != NULL) {
+ if (fmtdesc) {
strlcpy(format->name, fmtdesc->name,
sizeof format->name);
format->fcc = fmtdesc->fcc;
@@ -661,7 +661,7 @@ static int uvc_parse_streaming(struct uvc_device *dev,
}
streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
- if (streaming == NULL) {
+ if (!streaming) {
usb_driver_release_interface(&uvc_driver.driver, intf);
return -EINVAL;
}
@@ -749,7 +749,7 @@ static int uvc_parse_streaming(struct uvc_device *dev,
streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
GFP_KERNEL);
- if (streaming->header.bmaControls == NULL) {
+ if (!streaming->header.bmaControls) {
ret = -ENOMEM;
goto error;
}
@@ -815,7 +815,7 @@ static int uvc_parse_streaming(struct uvc_device *dev,
size = nformats * sizeof *format + nframes * sizeof *frame
+ nintervals * sizeof *interval;
format = kzalloc(size, GFP_KERNEL);
- if (format == NULL) {
+ if (!format) {
ret = -ENOMEM;
goto error;
}
@@ -867,7 +867,7 @@ static int uvc_parse_streaming(struct uvc_device *dev,
alts = &intf->altsetting[i];
ep = uvc_find_endpoint(alts,
streaming->header.bEndpointAddress);
- if (ep == NULL)
+ if (!ep)
continue;
psize = le16_to_cpu(ep->desc.wMaxPacketSize);
@@ -901,7 +901,7 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
+ num_inputs;
entity = kzalloc(size, GFP_KERNEL);
- if (entity == NULL)
+ if (!entity)
return NULL;
entity->id = id;
@@ -975,7 +975,7 @@ static int uvc_parse_vendor_control(struct uvc_device *dev,
unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
p + 1, 2*n);
- if (unit == NULL)
+ if (!unit)
return -ENOMEM;
memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
@@ -1028,7 +1028,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
/* Parse all USB Video Streaming interfaces. */
for (i = 0; i < n; ++i) {
intf = usb_ifnum_to_if(udev, buffer[12+i]);
- if (intf == NULL) {
+ if (!intf) {
uvc_trace(UVC_TRACE_DESCR,
"device %d interface %d doesn't exists\n",
udev->devnum, i);
@@ -1084,7 +1084,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1, n + p);
- if (term == NULL)
+ if (!term)
return -ENOMEM;
if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
@@ -1145,7 +1145,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1, 0);
- if (term == NULL)
+ if (!term)
return -ENOMEM;
memcpy(term->baSourceID, &buffer[7], 1);
@@ -1170,7 +1170,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
}
unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
- if (unit == NULL)
+ if (!unit)
return -ENOMEM;
memcpy(unit->baSourceID, &buffer[5], p);
@@ -1196,7 +1196,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
}
unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
- if (unit == NULL)
+ if (!unit)
return -ENOMEM;
memcpy(unit->baSourceID, &buffer[4], 1);
@@ -1229,7 +1229,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
}
unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
- if (unit == NULL)
+ if (!unit)
return -ENOMEM;
memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
@@ -1358,7 +1358,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " <- PU %d", entity->id);
- if (chain->processing != NULL) {
+ if (chain->processing) {
uvc_trace(UVC_TRACE_DESCR,
"Found multiple Processing Units in chain.\n");
return -1;
@@ -1375,7 +1375,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
if (entity->bNrInPins == 1)
break;
- if (chain->selector != NULL) {
+ if (chain->selector) {
uvc_trace(UVC_TRACE_DESCR,
"Found multiple Selector Units in chain.\n");
return -1;
@@ -1435,7 +1435,7 @@ static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
while (1) {
forward = uvc_entity_by_reference(chain->dev, entity->id,
forward);
- if (forward == NULL)
+ if (!forward)
break;
if (forward == prev)
continue;
@@ -1514,7 +1514,7 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
for (i = 0; i < entity->bNrInPins; ++i) {
id = entity->baSourceID[i];
term = uvc_entity_by_id(chain->dev, id);
- if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
+ if (!term || !UVC_ENTITY_IS_ITERM(term)) {
uvc_trace(UVC_TRACE_DESCR,
"Selector unit %d input %d isn't connected to an input terminal\n",
entity->id, i);
@@ -1551,7 +1551,7 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
}
entity = uvc_entity_by_id(chain->dev, id);
- if (entity == NULL) {
+ if (!entity) {
uvc_trace(UVC_TRACE_DESCR,
"Found reference to unknown entity %d.\n",
id);
@@ -1572,7 +1572,7 @@ static int uvc_scan_chain(struct uvc_video_chain *chain,
entity = term;
prev = NULL;
- while (entity != NULL) {
+ while (entity) {
/* Entity must not be part of an existing chain */
if (entity->chain.next || entity->chain.prev) {
uvc_trace(UVC_TRACE_DESCR,
@@ -1639,7 +1639,7 @@ static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
struct uvc_video_chain *chain;
chain = kzalloc(sizeof(*chain), GFP_KERNEL);
- if (chain == NULL)
+ if (!chain)
return NULL;
INIT_LIST_HEAD(&chain->entities);
@@ -1689,12 +1689,12 @@ static int uvc_scan_fallback(struct uvc_device *dev)
}
}
- if (iterm == NULL || oterm == NULL)
+ if (!iterm || !oterm)
return -EINVAL;
/* Allocate the chain and fill it. */
chain = uvc_alloc_chain(dev);
- if (chain == NULL)
+ if (!chain)
return -ENOMEM;
if (uvc_scan_chain_entity(chain, oterm) < 0)
@@ -1765,7 +1765,7 @@ static int uvc_scan_device(struct uvc_device *dev)
continue;
chain = uvc_alloc_chain(dev);
- if (chain == NULL)
+ if (!chain)
return -ENOMEM;
term->flags |= UVC_ENTITY_FLAG_DEFAULT;
@@ -1970,7 +1970,7 @@ static int uvc_register_terms(struct uvc_device *dev,
continue;
stream = uvc_stream_by_id(dev, term->id);
- if (stream == NULL) {
+ if (!stream) {
uvc_printk(KERN_INFO,
"No streaming interface found for terminal %u.",
term->id);
@@ -2048,7 +2048,7 @@ static int uvc_probe(struct usb_interface *intf,
dev->quirks = (uvc_quirks_param == -1)
? id->driver_info : uvc_quirks_param;
- if (udev->product != NULL)
+ if (udev->product)
strlcpy(dev->name, udev->product, sizeof dev->name);
else
snprintf(dev->name, sizeof dev->name,
--
2.11.0
--
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