* [PATCH 1/4] atm: idt77252: Adjust four function calls together with a variable assignment
2017-08-05 12:24 [PATCH 0/4] atm: idt77252: Adjustments for some function implementations SF Markus Elfring
@ 2017-08-05 12:26 ` SF Markus Elfring
2017-08-05 12:28 ` [PATCH 2/4] atm: idt77252: Delete an error message for a failed memory allocation in seven functions SF Markus Elfring
` (2 subsequent siblings)
3 siblings, 0 replies; 6+ messages in thread
From: SF Markus Elfring @ 2017-08-05 12:26 UTC (permalink / raw)
To: linux-atm-general, netdev, Chas Williams; +Cc: LKML, kernel-janitors
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Fri, 4 Aug 2017 22:20:08 +0200
The script "checkpatch.pl" pointed information out like the following.
ERROR: do not use assignment in if condition
Thus fix the affected source code places.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/atm/idt77252.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c
index b7a168c46692..6a051f5909d0 100644
--- a/drivers/atm/idt77252.c
+++ b/drivers/atm/idt77252.c
@@ -1070,7 +1070,8 @@ dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
cell = skb->data;
for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
- if ((sb = dev_alloc_skb(64)) == NULL) {
+ sb = dev_alloc_skb(64);
+ if (!sb) {
printk("%s: Can't allocate buffers for aal0.\n",
card->name);
atomic_add(i, &vcc->stats->rx_drop);
@@ -1304,7 +1305,8 @@ idt77252_rx_raw(struct idt77252_dev *card)
goto drop;
}
- if ((sb = dev_alloc_skb(64)) == NULL) {
+ sb = dev_alloc_skb(64);
+ if (!sb) {
printk("%s: Can't allocate buffers for AAL0.\n",
card->name);
atomic_inc(&vcc->stats->rx_err);
@@ -3600,13 +3602,14 @@ static int idt77252_init_one(struct pci_dev *pcidev,
struct atm_dev *dev;
int i, err;
-
- if ((err = pci_enable_device(pcidev))) {
+ err = pci_enable_device(pcidev);
+ if (err) {
printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
return err;
}
- if ((err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)))) {
+ err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32));
+ if (err) {
printk("idt77252: can't enable DMA for PCI device at %s\n", pci_name(pcidev));
return err;
}
--
2.13.4
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH 2/4] atm: idt77252: Delete an error message for a failed memory allocation in seven functions
2017-08-05 12:24 [PATCH 0/4] atm: idt77252: Adjustments for some function implementations SF Markus Elfring
2017-08-05 12:26 ` [PATCH 1/4] atm: idt77252: Adjust four function calls together with a variable assignment SF Markus Elfring
@ 2017-08-05 12:28 ` SF Markus Elfring
2017-08-06 19:06 ` kbuild test robot
2017-08-05 12:30 ` [PATCH 3/4] atm: idt77252: Improve seven size determinations SF Markus Elfring
2017-08-05 12:32 ` [PATCH 4/4] atm: idt77252: Adjust ten checks for null pointers SF Markus Elfring
3 siblings, 1 reply; 6+ messages in thread
From: SF Markus Elfring @ 2017-08-05 12:28 UTC (permalink / raw)
To: linux-atm-general, netdev, Chas Williams; +Cc: LKML, kernel-janitors
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 5 Aug 2017 12:45:34 +0200
Omit an extra message for a memory allocation failure in these functions.
This issue was detected by using the Coccinelle software.
Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/atm/idt77252.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)
diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c
index 6a051f5909d0..434dc4ee5f15 100644
--- a/drivers/atm/idt77252.c
+++ b/drivers/atm/idt77252.c
@@ -1307,8 +1307,6 @@ idt77252_rx_raw(struct idt77252_dev *card)
sb = dev_alloc_skb(64);
if (!sb) {
- printk("%s: Can't allocate buffers for AAL0.\n",
- card->name);
atomic_inc(&vcc->stats->rx_err);
goto drop;
}
@@ -2007,7 +2005,6 @@ idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
skb = dev_alloc_skb(64);
if (!skb) {
- printk("%s: Out of memory in send_oam().\n", card->name);
atomic_inc(&vcc->stats->tx_err);
return -ENOMEM;
}
@@ -2427,7 +2424,6 @@ idt77252_open(struct atm_vcc *vcc)
if (!card->vcs[index]) {
card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
if (!card->vcs[index]) {
- printk("%s: can't alloc vc in open()\n", card->name);
mutex_unlock(&card->mutex);
return -ENOMEM;
}
@@ -2857,10 +2853,9 @@ open_card_oam(struct idt77252_dev *card)
index = VPCI2VC(card, vpi, vci);
vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
- if (!vc) {
- printk("%s: can't alloc vc\n", card->name);
+ if (!vc)
return -ENOMEM;
- }
+
vc->index = index;
card->vcs[index] = vc;
@@ -2924,10 +2919,9 @@ open_card_ubr0(struct idt77252_dev *card)
struct vc_map *vc;
vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
- if (!vc) {
- printk("%s: can't alloc vc\n", card->name);
+ if (!vc)
return -ENOMEM;
- }
+
card->vcs[0] = vc;
vc->class = SCHED_UBR0;
@@ -3410,7 +3404,6 @@ static int init_card(struct atm_dev *dev)
IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
card->vcs = vzalloc(size);
if (!card->vcs) {
- printk("%s: memory allocation failure.\n", card->name);
deinit_card(card);
return -1;
}
@@ -3420,7 +3413,6 @@ static int init_card(struct atm_dev *dev)
card->name, size);
card->scd2vc = vzalloc(size);
if (!card->scd2vc) {
- printk("%s: memory allocation failure.\n", card->name);
deinit_card(card);
return -1;
}
@@ -3430,7 +3422,6 @@ static int init_card(struct atm_dev *dev)
card->name, size);
card->soft_tst = vmalloc(size);
if (!card->soft_tst) {
- printk("%s: memory allocation failure.\n", card->name);
deinit_card(card);
return -1;
}
@@ -3616,7 +3607,6 @@ static int idt77252_init_one(struct pci_dev *pcidev,
card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
if (!card) {
- printk("idt77252-%d: can't allocate private data\n", index);
err = -ENOMEM;
goto err_out_disable_pdev;
}
--
2.13.4
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH 2/4] atm: idt77252: Delete an error message for a failed memory allocation in seven functions
2017-08-05 12:28 ` [PATCH 2/4] atm: idt77252: Delete an error message for a failed memory allocation in seven functions SF Markus Elfring
@ 2017-08-06 19:06 ` kbuild test robot
0 siblings, 0 replies; 6+ messages in thread
From: kbuild test robot @ 2017-08-06 19:06 UTC (permalink / raw)
To: SF Markus Elfring
Cc: kbuild-all, linux-atm-general, netdev, Chas Williams, LKML,
kernel-janitors
[-- Attachment #1: Type: text/plain, Size: 2450 bytes --]
Hi Markus,
[auto build test WARNING on linus/master]
[also build test WARNING on v4.13-rc3 next-20170804]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/SF-Markus-Elfring/atm-idt77252-Adjust-four-function-calls-together-with-a-variable-assignment/20170806-081417
config: x86_64-randconfig-b0-08070032 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All warnings (new ones prefixed by >>):
drivers//atm/idt77252.c: In function 'idt77252_send_oam':
>> drivers//atm/idt77252.c:2003: warning: unused variable 'card'
vim +/card +2003 drivers//atm/idt77252.c
^1da177e Linus Torvalds 2005-04-16 1998
^1da177e Linus Torvalds 2005-04-16 1999 static int
^1da177e Linus Torvalds 2005-04-16 2000 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
^1da177e Linus Torvalds 2005-04-16 2001 {
^1da177e Linus Torvalds 2005-04-16 2002 struct atm_dev *dev = vcc->dev;
^1da177e Linus Torvalds 2005-04-16 @2003 struct idt77252_dev *card = dev->dev_data;
^1da177e Linus Torvalds 2005-04-16 2004 struct sk_buff *skb;
^1da177e Linus Torvalds 2005-04-16 2005
^1da177e Linus Torvalds 2005-04-16 2006 skb = dev_alloc_skb(64);
^1da177e Linus Torvalds 2005-04-16 2007 if (!skb) {
^1da177e Linus Torvalds 2005-04-16 2008 atomic_inc(&vcc->stats->tx_err);
^1da177e Linus Torvalds 2005-04-16 2009 return -ENOMEM;
^1da177e Linus Torvalds 2005-04-16 2010 }
14afee4b Reshetova, Elena 2017-06-30 2011 refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
^1da177e Linus Torvalds 2005-04-16 2012
59ae1d12 Johannes Berg 2017-06-16 2013 skb_put_data(skb, cell, 52);
^1da177e Linus Torvalds 2005-04-16 2014
^1da177e Linus Torvalds 2005-04-16 2015 return idt77252_send_skb(vcc, skb, 1);
^1da177e Linus Torvalds 2005-04-16 2016 }
^1da177e Linus Torvalds 2005-04-16 2017
:::::: The code at line 2003 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 34611 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 3/4] atm: idt77252: Improve seven size determinations
2017-08-05 12:24 [PATCH 0/4] atm: idt77252: Adjustments for some function implementations SF Markus Elfring
2017-08-05 12:26 ` [PATCH 1/4] atm: idt77252: Adjust four function calls together with a variable assignment SF Markus Elfring
2017-08-05 12:28 ` [PATCH 2/4] atm: idt77252: Delete an error message for a failed memory allocation in seven functions SF Markus Elfring
@ 2017-08-05 12:30 ` SF Markus Elfring
2017-08-05 12:32 ` [PATCH 4/4] atm: idt77252: Adjust ten checks for null pointers SF Markus Elfring
3 siblings, 0 replies; 6+ messages in thread
From: SF Markus Elfring @ 2017-08-05 12:30 UTC (permalink / raw)
To: linux-atm-general, netdev, Chas Williams; +Cc: LKML, kernel-janitors
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 5 Aug 2017 13:51:04 +0200
Replace the specification of data structures by pointer dereferences
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/atm/idt77252.c | 17 ++++++++---------
1 file changed, 8 insertions(+), 9 deletions(-)
diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c
index 434dc4ee5f15..e26e36a934e9 100644
--- a/drivers/atm/idt77252.c
+++ b/drivers/atm/idt77252.c
@@ -638,7 +638,7 @@ alloc_scq(struct idt77252_dev *card, int class)
{
struct scq_info *scq;
- scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
+ scq = kzalloc(sizeof(*scq), GFP_KERNEL);
if (!scq)
return NULL;
scq->base = dma_zalloc_coherent(&card->pcidev->dev, SCQ_SIZE,
@@ -2119,7 +2119,7 @@ idt77252_init_est(struct vc_map *vc, int pcr)
{
struct rate_estimator *est;
- est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
+ est = kzalloc(sizeof(*est), GFP_KERNEL);
if (!est)
return NULL;
est->maxcps = pcr < 0 ? -pcr : pcr;
@@ -2422,7 +2422,8 @@ idt77252_open(struct atm_vcc *vcc)
index = VPCI2VC(card, vpi, vci);
if (!card->vcs[index]) {
- card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
+ card->vcs[index] = kzalloc(sizeof(*card->vcs[index]),
+ GFP_KERNEL);
if (!card->vcs[index]) {
mutex_unlock(&card->mutex);
return -ENOMEM;
@@ -2612,8 +2613,7 @@ idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
goto out;
}
- memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
-
+ memcpy(&vcc->qos, qos, sizeof(*qos));
set_bit(ATM_VF_HASQOS, &vcc->flags);
out:
@@ -2851,8 +2851,7 @@ open_card_oam(struct idt77252_dev *card)
for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
for (vci = 3; vci < 5; vci++) {
index = VPCI2VC(card, vpi, vci);
-
- vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
+ vc = kzalloc(sizeof(*vc), GFP_KERNEL);
if (!vc)
return -ENOMEM;
@@ -2918,7 +2917,7 @@ open_card_ubr0(struct idt77252_dev *card)
{
struct vc_map *vc;
- vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
+ vc = kzalloc(sizeof(*vc), GFP_KERNEL);
if (!vc)
return -ENOMEM;
@@ -3605,7 +3604,7 @@ static int idt77252_init_one(struct pci_dev *pcidev,
return err;
}
- card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
+ card = kzalloc(sizeof(*card), GFP_KERNEL);
if (!card) {
err = -ENOMEM;
goto err_out_disable_pdev;
--
2.13.4
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH 4/4] atm: idt77252: Adjust ten checks for null pointers
2017-08-05 12:24 [PATCH 0/4] atm: idt77252: Adjustments for some function implementations SF Markus Elfring
` (2 preceding siblings ...)
2017-08-05 12:30 ` [PATCH 3/4] atm: idt77252: Improve seven size determinations SF Markus Elfring
@ 2017-08-05 12:32 ` SF Markus Elfring
3 siblings, 0 replies; 6+ messages in thread
From: SF Markus Elfring @ 2017-08-05 12:32 UTC (permalink / raw)
To: linux-atm-general, netdev, Chas Williams; +Cc: LKML, kernel-janitors
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 5 Aug 2017 14:04:42 +0200
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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@users.sourceforge.net>
---
drivers/atm/idt77252.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c
index e26e36a934e9..184934e05193 100644
--- a/drivers/atm/idt77252.c
+++ b/drivers/atm/idt77252.c
@@ -643,7 +643,7 @@ alloc_scq(struct idt77252_dev *card, int class)
return NULL;
scq->base = dma_zalloc_coherent(&card->pcidev->dev, SCQ_SIZE,
&scq->paddr, GFP_KERNEL);
- if (scq->base == NULL) {
+ if (!scq->base) {
kfree(scq);
return NULL;
}
@@ -973,7 +973,7 @@ init_rsq(struct idt77252_dev *card)
card->rsq.base = dma_zalloc_coherent(&card->pcidev->dev, RSQSIZE,
&card->rsq.paddr, GFP_KERNEL);
- if (card->rsq.base == NULL) {
+ if (!card->rsq.base) {
printk("%s: can't allocate RSQ.\n", card->name);
return -1;
}
@@ -1026,7 +1026,7 @@ dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
}
skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
- if (skb == NULL) {
+ if (!skb) {
printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
card->name, __func__,
le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
@@ -1242,7 +1242,7 @@ idt77252_rx_raw(struct idt77252_dev *card)
struct vc_map *vc;
struct sk_buff *sb;
- if (card->raw_cell_head == NULL) {
+ if (!card->raw_cell_head) {
u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
card->raw_cell_head = sb_pool_skb(card, handle);
}
@@ -1375,7 +1375,7 @@ init_tsq(struct idt77252_dev *card)
card->tsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE,
&card->tsq.paddr, GFP_KERNEL);
- if (card->tsq.base == NULL) {
+ if (!card->tsq.base) {
printk("%s: can't allocate TSQ.\n", card->name);
return -1;
}
@@ -1601,7 +1601,7 @@ __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
avail = card->tst_size - 2;
for (e = 0; e < avail; e++) {
- if (card->soft_tst[e].vc == NULL)
+ if (!card->soft_tst[e].vc)
break;
}
if (e >= avail) {
@@ -1624,7 +1624,7 @@ __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
* Fill Soft TST.
*/
while (r > 0) {
- if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
+ if ((cl >= avail) && !card->soft_tst[e].vc) {
if (vc)
card->soft_tst[e].vc = vc;
else
@@ -1948,7 +1948,7 @@ idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
struct vc_map *vc = vcc->dev_data;
int err;
- if (vc == NULL) {
+ if (!vc) {
printk("%s: NULL connection in send().\n", card->name);
atomic_inc(&vcc->stats->tx_err);
dev_kfree_skb(skb);
@@ -3429,12 +3429,12 @@ static int init_card(struct atm_dev *dev)
card->soft_tst[i].vc = NULL;
}
- if (dev->phy == NULL) {
+ if (!dev->phy) {
printk("%s: No LT device defined.\n", card->name);
deinit_card(card);
return -1;
}
- if (dev->phy->ioctl == NULL) {
+ if (!dev->phy->ioctl) {
printk("%s: LT had no IOCTL function defined.\n", card->name);
deinit_card(card);
return -1;
--
2.13.4
^ permalink raw reply related [flat|nested] 6+ messages in thread