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[PATCH 0/7] aacraid: Fine-tuning for a few functions

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  [PATCH 0/7] aacraid: Fine-tuning for a few functions SF Markus Elfring <elfring@users.sourceforge.net> - 2016-08-21 09:20 +0200
    [PATCH 5/7] aacraid: Add spaces after control flow keywords SF Markus Elfring <elfring@users.sourceforge.net> - 2016-08-21 09:30 +0200
    [PATCH 4/7] aacraid: Delete unnecessary braces SF Markus Elfring <elfring@users.sourceforge.net> - 2016-08-21 09:30 +0200
    [PATCH 2/7] aacraid: One function call less in aac_send_raw_srb()  after error detection SF Markus Elfring <elfring@users.sourceforge.net> - 2016-08-21 09:30 +0200
    [PATCH 3/7] aacraid: Delete unnecessary initialisations in  aac_send_raw_srb() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-08-21 09:30 +0200
    [PATCH 6/7] aacraid: Improve determination of a few sizes SF Markus Elfring <elfring@users.sourceforge.net> - 2016-08-21 09:30 +0200
    [PATCH 7/7] aacraid: Apply another recommendation from  "checkpatch.pl" SF Markus Elfring <elfring@users.sourceforge.net> - 2016-08-21 09:40 +0200

#1466926 — [PATCH 0/7] aacraid: Fine-tuning for a few functions

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sun, 21 Aug 2016 09:03:21 +0200

Several update suggestions were taken into account
from static source code analysis.

Markus Elfring (7):
  Use memdup_user() rather than duplicating its implementation
  One function call less in aac_send_raw_srb() after error detection
  Delete unnecessary initialisations in aac_send_raw_srb()
  Delete unnecessary braces
  Add spaces after control flow keywords
  Improve determination of a few sizes
  Apply another recommendation from "checkpatch.pl"

 drivers/scsi/aacraid/commctrl.c | 140 +++++++++++++++++++---------------------
 1 file changed, 67 insertions(+), 73 deletions(-)

-- 
2.9.3

[toc] | [next] | [standalone]

#1466928 — [PATCH 5/7] aacraid: Add spaces after control flow keywords

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sun, 21 Aug 2016 07:10:43 +0200

Keywords which belong to the category "control flow" in the C programming
language should be followed by a space character according to
the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/scsi/aacraid/commctrl.c | 41 ++++++++++++++++++++++++-----------------
 1 file changed, 24 insertions(+), 17 deletions(-)

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index 9f4ddb0..cda03f0 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -251,7 +251,7 @@ static int next_getadapter_fib(struct aac_dev * dev, void __user *arg)
 	struct list_head * entry;
 	unsigned long flags;
 
-	if(copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
+	if (copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
 		return -EFAULT;
 	/*
 	 *	Verify that the HANDLE passed in was a valid AdapterFibContext
@@ -280,7 +280,7 @@ static int next_getadapter_fib(struct aac_dev * dev, void __user *arg)
 		return -EINVAL;
 	}
 
-	if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
+	if ((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
 		 (fibctx->size != sizeof(struct aac_fib_context))) {
 		spin_unlock_irqrestore(&dev->fib_lock, flags);
 		dprintk ((KERN_INFO "Fib Context corrupt?\n"));
@@ -327,7 +327,7 @@ return_fib:
 			ssleep(1);
 		}
 		if (f.wait) {
-			if(down_interruptible(&fibctx->wait_sem) < 0) {
+			if (down_interruptible(&fibctx->wait_sem) < 0) {
 				status = -ERESTARTSYS;
 			} else {
 				/* Lock again and retry */
@@ -404,7 +404,7 @@ static int close_getadapter_fib(struct aac_dev * dev, void __user *arg)
 	entry = dev->fib_list.next;
 	fibctx = NULL;
 
-	while(entry != &dev->fib_list) {
+	while (entry != &dev->fib_list) {
 		fibctx = list_entry(entry, struct aac_fib_context, next);
 		/*
 		 *	Extract the fibctx from the input parameters
@@ -418,7 +418,7 @@ static int close_getadapter_fib(struct aac_dev * dev, void __user *arg)
 	if (!fibctx)
 		return 0; /* Already gone */
 
-	if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
+	if ((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
 		 (fibctx->size != sizeof(struct aac_fib_context)))
 		return -EINVAL;
 	spin_lock_irqsave(&dev->fib_lock, flags);
@@ -509,7 +509,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 	srbcmd = (struct aac_srb*) fib_data(srbfib);
 
 	memset(sg_list, 0, sizeof(sg_list)); /* cleanup may take issue */
-	if(copy_from_user(&fibsize, &user_srb->count,sizeof(u32))){
+	if (copy_from_user(&fibsize, &user_srb->count, sizeof(u32))) {
 		dprintk((KERN_DEBUG"aacraid: Could not copy data size from user\n"));
 		rcode = -EFAULT;
 		goto free_sg_list;
@@ -605,7 +605,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				}
 				/* Does this really need to be GFP_DMA? */
 				p = kmalloc(upsg->sg[i].count,GFP_KERNEL|__GFP_DMA);
-				if(!p) {
+				if (!p) {
 					dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
 					  upsg->sg[i].count,i,upsg->count));
 					rcode = -ENOMEM;
@@ -618,7 +618,9 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				sg_indx = i;
 
 				if (flags & SRB_DataOut) {
-					if(copy_from_user(p,sg_user[i],upsg->sg[i].count)){
+					if (copy_from_user(p,
+							   sg_user[i],
+							   upsg->sg[i].count)) {
 						dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 						rcode = -EFAULT;
 						goto free_user_srbcmd;
@@ -657,7 +659,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				}
 				/* Does this really need to be GFP_DMA? */
 				p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA);
-				if(!p) {
+				if (!p) {
 					dprintk((KERN_DEBUG "aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
 					  usg->sg[i].count,i,usg->count));
 					kfree(usg);
@@ -669,7 +671,9 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				sg_indx = i;
 
 				if (flags & SRB_DataOut) {
-					if(copy_from_user(p,sg_user[i],upsg->sg[i].count)){
+					if (copy_from_user(p,
+							   sg_user[i],
+							   upsg->sg[i].count)) {
 						kfree (usg);
 						dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 						rcode = -EFAULT;
@@ -710,7 +714,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				}
 				/* Does this really need to be GFP_DMA? */
 				p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA);
-				if(!p) {
+				if (!p) {
 					dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
 					  usg->sg[i].count,i,usg->count));
 					rcode = -ENOMEM;
@@ -723,7 +727,9 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				sg_indx = i;
 
 				if (flags & SRB_DataOut) {
-					if(copy_from_user(p,sg_user[i],usg->sg[i].count)){
+					if (copy_from_user(p,
+							   sg_user[i],
+							   usg->sg[i].count)) {
 						dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 						rcode = -EFAULT;
 						goto free_user_srbcmd;
@@ -759,8 +765,9 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				sg_indx = i;
 
 				if (flags & SRB_DataOut) {
-					if(copy_from_user(p, sg_user[i],
-							upsg->sg[i].count)) {
+					if (copy_from_user(p,
+							   sg_user[i],
+							   upsg->sg[i].count)) {
 						dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 						rcode = -EFAULT;
 						goto free_user_srbcmd;
@@ -793,12 +800,12 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 	}
 
 	if (flags & SRB_DataIn) {
-		for(i = 0 ; i <= sg_indx; i++){
+		for (i = 0 ; i <= sg_indx; i++) {
 			byte_count = le32_to_cpu(
 			  (dev->adapter_info.options & AAC_OPT_SGMAP_HOST64)
 			      ? ((struct sgmap64*)&srbcmd->sg)->sg[i].count
 			      : srbcmd->sg.sg[i].count);
-			if(copy_to_user(sg_user[i], sg_list[i], byte_count)){
+			if (copy_to_user(sg_user[i], sg_list[i], byte_count)) {
 				dprintk((KERN_DEBUG"aacraid: Could not copy sg data to user\n"));
 				rcode = -EFAULT;
 				goto free_user_srbcmd;
@@ -808,7 +815,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 	}
 
 	reply = (struct aac_srb_reply *) fib_data(srbfib);
-	if(copy_to_user(user_reply,reply,sizeof(struct aac_srb_reply))){
+	if (copy_to_user(user_reply, reply, sizeof(struct aac_srb_reply))) {
 		dprintk((KERN_DEBUG"aacraid: Could not copy reply to user\n"));
 		rcode = -EFAULT;
 	}
-- 
2.9.3

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#1466929 — [PATCH 4/7] aacraid: Delete unnecessary braces

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sun, 21 Aug 2016 07:07:08 +0200

Do not use curly brackets at some source code places
where a single statement should be sufficient.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/scsi/aacraid/commctrl.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index 49a664f..9f4ddb0 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -66,13 +66,11 @@ static int ioctl_send_fib(struct aac_dev * dev, void __user *arg)
 	unsigned int size, osize;
 	int retval;
 
-	if (dev->in_reset) {
+	if (dev->in_reset)
 		return -EBUSY;
-	}
 	fibptr = aac_fib_alloc(dev);
-	if(fibptr == NULL) {
+	if (!fibptr)
 		return -ENOMEM;
-	}
 
 	kfib = fibptr->hw_fib_va;
 	/*
@@ -138,9 +136,8 @@ static int ioctl_send_fib(struct aac_dev * dev, void __user *arg)
 		retval = aac_fib_send(le16_to_cpu(kfib->header.Command), fibptr,
 				le16_to_cpu(kfib->header.Size) , FsaNormal,
 				1, 1, NULL, NULL);
-		if (retval) {
+		if (retval)
 			goto cleanup;
-		}
 		if (aac_fib_complete(fibptr) != 0) {
 			retval = -EINVAL;
 			goto cleanup;
@@ -228,12 +225,10 @@ static int open_getadapter_fib(struct aac_dev * dev, void __user *arg)
 		}
 		list_add_tail(&fibctx->next, &dev->fib_list);
 		spin_unlock_irqrestore(&dev->fib_lock, flags);
-		if (copy_to_user(arg, &fibctx->unique,
-						sizeof(fibctx->unique))) {
+		if (copy_to_user(arg, &fibctx->unique, sizeof(fibctx->unique)))
 			status = -EFAULT;
-		} else {
+		else
 			status = 0;
-		}
 	}
 	return status;
 }
@@ -820,9 +815,8 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 free_user_srbcmd:
 	kfree(user_srbcmd);
 free_sg_list:
-	for(i=0; i <= sg_indx; i++){
+	for (i = 0; i <= sg_indx; i++)
 		kfree(sg_list[i]);
-	}
 	if (rcode != -ERESTARTSYS) {
 		aac_fib_complete(srbfib);
 		aac_fib_free(srbfib);
-- 
2.9.3

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#1466930 — [PATCH 2/7] aacraid: One function call less in aac_send_raw_srb() after error detection

From e8187662ee30aab709a260c72fb86c51673f8e0d Mon Sep 17 00:00:00 2001
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 20 Aug 2016 20:40:47 +0200
Subject: [PATCH 2/7] aacraid: One function call less in aac_send_raw_srb()
 after error detection

The kfree() function was called in a few cases by the
aac_send_raw_srb() function during error handling
even if the variable "user_srbcmd" contained eventually
an inappropriate pointer value.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/scsi/aacraid/commctrl.c | 49 ++++++++++++++++++++---------------------
 1 file changed, 24 insertions(+), 25 deletions(-)

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index 1af3084..6dcdf91 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -517,19 +517,19 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 	if(copy_from_user(&fibsize, &user_srb->count,sizeof(u32))){
 		dprintk((KERN_DEBUG"aacraid: Could not copy data size from user\n"));
 		rcode = -EFAULT;
-		goto cleanup;
+		goto free_sg_list;
 	}
 
 	if ((fibsize < (sizeof(struct user_aac_srb) - sizeof(struct user_sgentry))) ||
 	    (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)))) {
 		rcode = -EINVAL;
-		goto cleanup;
+		goto free_sg_list;
 	}
 
 	user_srbcmd = memdup_user(user_srb, fibsize);
 	if (IS_ERR(user_srbcmd)) {
 		rcode = PTR_ERR(user_srbcmd);
-		goto cleanup;
+		goto free_sg_list;
 	}
 
 	user_reply = arg+fibsize;
@@ -564,7 +564,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 		dprintk((KERN_DEBUG"aacraid: too many sg entries %d\n",
 		  le32_to_cpu(srbcmd->sg.count)));
 		rcode = -EINVAL;
-		goto cleanup;
+		goto free_user_srbcmd;
 	}
 	actual_fibsize = sizeof(struct aac_srb) - sizeof(struct sgentry) +
 		((user_srbcmd->sg.count & 0xff) * sizeof(struct sgentry));
@@ -580,12 +580,12 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 		  sizeof(struct aac_srb), sizeof(struct sgentry),
 		  sizeof(struct sgentry64), fibsize));
 		rcode = -EINVAL;
-		goto cleanup;
+		goto free_user_srbcmd;
 	}
 	if ((data_dir == DMA_NONE) && user_srbcmd->sg.count) {
 		dprintk((KERN_DEBUG"aacraid: SG with no direction specified in Raw SRB command\n"));
 		rcode = -EINVAL;
-		goto cleanup;
+		goto free_user_srbcmd;
 	}
 	byte_count = 0;
 	if (dev->adapter_info.options & AAC_OPT_SGMAP_HOST64) {
@@ -606,7 +606,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				      (dev->scsi_host_ptr->max_sectors << 9) :
 				      65536)) {
 					rcode = -EINVAL;
-					goto cleanup;
+					goto free_user_srbcmd;
 				}
 				/* Does this really need to be GFP_DMA? */
 				p = kmalloc(upsg->sg[i].count,GFP_KERNEL|__GFP_DMA);
@@ -614,7 +614,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 					dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
 					  upsg->sg[i].count,i,upsg->count));
 					rcode = -ENOMEM;
-					goto cleanup;
+					goto free_user_srbcmd;
 				}
 				addr = (u64)upsg->sg[i].addr[0];
 				addr += ((u64)upsg->sg[i].addr[1]) << 32;
@@ -626,7 +626,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 					if(copy_from_user(p,sg_user[i],upsg->sg[i].count)){
 						dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 						rcode = -EFAULT;
-						goto cleanup;
+						goto free_user_srbcmd;
 					}
 				}
 				addr = pci_map_single(dev->pdev, p, upsg->sg[i].count, data_dir);
@@ -644,7 +644,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 			if (!usg) {
 				dprintk((KERN_DEBUG"aacraid: Allocation error in Raw SRB command\n"));
 				rcode = -ENOMEM;
-				goto cleanup;
+				goto free_user_srbcmd;
 			}
 			actual_fibsize = actual_fibsize64;
 
@@ -658,7 +658,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				      65536)) {
 					kfree(usg);
 					rcode = -EINVAL;
-					goto cleanup;
+					goto free_user_srbcmd;
 				}
 				/* Does this really need to be GFP_DMA? */
 				p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA);
@@ -667,7 +667,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 					  usg->sg[i].count,i,usg->count));
 					kfree(usg);
 					rcode = -ENOMEM;
-					goto cleanup;
+					goto free_user_srbcmd;
 				}
 				sg_user[i] = (void __user *)(uintptr_t)usg->sg[i].addr;
 				sg_list[i] = p; // save so we can clean up later
@@ -678,7 +678,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 						kfree (usg);
 						dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 						rcode = -EFAULT;
-						goto cleanup;
+						goto free_user_srbcmd;
 					}
 				}
 				addr = pci_map_single(dev->pdev, p, usg->sg[i].count, data_dir);
@@ -711,7 +711,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				      (dev->scsi_host_ptr->max_sectors << 9) :
 				      65536)) {
 					rcode = -EINVAL;
-					goto cleanup;
+					goto free_user_srbcmd;
 				}
 				/* Does this really need to be GFP_DMA? */
 				p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA);
@@ -719,7 +719,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 					dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
 					  usg->sg[i].count,i,usg->count));
 					rcode = -ENOMEM;
-					goto cleanup;
+					goto free_user_srbcmd;
 				}
 				addr = (u64)usg->sg[i].addr[0];
 				addr += ((u64)usg->sg[i].addr[1]) << 32;
@@ -731,7 +731,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 					if(copy_from_user(p,sg_user[i],usg->sg[i].count)){
 						dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 						rcode = -EFAULT;
-						goto cleanup;
+						goto free_user_srbcmd;
 					}
 				}
 				addr = pci_map_single(dev->pdev, p, usg->sg[i].count, data_dir);
@@ -750,14 +750,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				      (dev->scsi_host_ptr->max_sectors << 9) :
 				      65536)) {
 					rcode = -EINVAL;
-					goto cleanup;
+					goto free_user_srbcmd;
 				}
 				p = kmalloc(upsg->sg[i].count, GFP_KERNEL);
 				if (!p) {
 					dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
 					  upsg->sg[i].count, i, upsg->count));
 					rcode = -ENOMEM;
-					goto cleanup;
+					goto free_user_srbcmd;
 				}
 				sg_user[i] = (void __user *)(uintptr_t)upsg->sg[i].addr;
 				sg_list[i] = p; // save so we can clean up later
@@ -768,7 +768,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 							upsg->sg[i].count)) {
 						dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 						rcode = -EFAULT;
-						goto cleanup;
+						goto free_user_srbcmd;
 					}
 				}
 				addr = pci_map_single(dev->pdev, p,
@@ -788,13 +788,13 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 	}
 	if (status == -ERESTARTSYS) {
 		rcode = -ERESTARTSYS;
-		goto cleanup;
+		goto free_user_srbcmd;
 	}
 
 	if (status != 0){
 		dprintk((KERN_DEBUG"aacraid: Could not send raw srb fib to hba\n"));
 		rcode = -ENXIO;
-		goto cleanup;
+		goto free_user_srbcmd;
 	}
 
 	if (flags & SRB_DataIn) {
@@ -806,7 +806,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 			if(copy_to_user(sg_user[i], sg_list[i], byte_count)){
 				dprintk((KERN_DEBUG"aacraid: Could not copy sg data to user\n"));
 				rcode = -EFAULT;
-				goto cleanup;
+				goto free_user_srbcmd;
 
 			}
 		}
@@ -816,11 +816,10 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 	if(copy_to_user(user_reply,reply,sizeof(struct aac_srb_reply))){
 		dprintk((KERN_DEBUG"aacraid: Could not copy reply to user\n"));
 		rcode = -EFAULT;
-		goto cleanup;
 	}
-
-cleanup:
+free_user_srbcmd:
 	kfree(user_srbcmd);
+free_sg_list:
 	for(i=0; i <= sg_indx; i++){
 		kfree(sg_list[i]);
 	}
-- 
2.9.3

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#1466931 — [PATCH 3/7] aacraid: Delete unnecessary initialisations in aac_send_raw_srb()

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 20 Aug 2016 21:25:20 +0200

Six local variables will be set to an appropriate value a bit later.
Thus omit the explicit initialisation at the beginning.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/scsi/aacraid/commctrl.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index 6dcdf91..49a664f 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -476,20 +476,20 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 {
 	struct fib* srbfib;
 	int status;
-	struct aac_srb *srbcmd = NULL;
-	struct user_aac_srb *user_srbcmd = NULL;
+	struct aac_srb *srbcmd;
+	struct user_aac_srb *user_srbcmd;
 	struct user_aac_srb __user *user_srb = arg;
 	struct aac_srb_reply __user *user_reply;
 	struct aac_srb_reply* reply;
-	u32 fibsize = 0;
-	u32 flags = 0;
+	u32 fibsize;
+	u32 flags;
 	s32 rcode = 0;
 	u32 data_dir;
 	void __user *sg_user[32];
 	void *sg_list[32];
 	u32 sg_indx = 0;
-	u32 byte_count = 0;
-	u32 actual_fibsize64, actual_fibsize = 0;
+	u32 byte_count;
+	u32 actual_fibsize64, actual_fibsize;
 	int i;
 
 
-- 
2.9.3

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#1466932 — [PATCH 6/7] aacraid: Improve determination of a few sizes

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sun, 21 Aug 2016 08:04:48 +0200

Replace the specification of data structures by references for variables
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/scsi/aacraid/commctrl.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index cda03f0..d2029db 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -177,7 +177,7 @@ static int open_getadapter_fib(struct aac_dev * dev, void __user *arg)
 	struct aac_fib_context * fibctx;
 	int status;
 
-	fibctx = kmalloc(sizeof(struct aac_fib_context), GFP_KERNEL);
+	fibctx = kmalloc(sizeof(*fibctx), GFP_KERNEL);
 	if (fibctx == NULL) {
 		status = -ENOMEM;
 	} else {
@@ -186,7 +186,7 @@ static int open_getadapter_fib(struct aac_dev * dev, void __user *arg)
 		struct aac_fib_context * context;
 
 		fibctx->type = FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT;
-		fibctx->size = sizeof(struct aac_fib_context);
+		fibctx->size = sizeof(*fibctx);
 		/*
 		 *	Yes yes, I know this could be an index, but we have a
 		 * better guarantee of uniqueness for the locked loop below.
@@ -251,7 +251,7 @@ static int next_getadapter_fib(struct aac_dev * dev, void __user *arg)
 	struct list_head * entry;
 	unsigned long flags;
 
-	if (copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
+	if (copy_from_user(&f, arg, sizeof(f)))
 		return -EFAULT;
 	/*
 	 *	Verify that the HANDLE passed in was a valid AdapterFibContext
@@ -509,7 +509,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 	srbcmd = (struct aac_srb*) fib_data(srbfib);
 
 	memset(sg_list, 0, sizeof(sg_list)); /* cleanup may take issue */
-	if (copy_from_user(&fibsize, &user_srb->count, sizeof(u32))) {
+	if (copy_from_user(&fibsize, &user_srb->count, sizeof(fibsize))) {
 		dprintk((KERN_DEBUG"aacraid: Could not copy data size from user\n"));
 		rcode = -EFAULT;
 		goto free_sg_list;
-- 
2.9.3

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#1466934 — [PATCH 7/7] aacraid: Apply another recommendation from "checkpatch.pl"

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sun, 21 Aug 2016 08:23:25 +0200

The script "checkpatch.pl" can point out that assignments should usually
not be performed within condition checks.
Thus move the assignment for the variable "srbfib" to a separate statement.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/scsi/aacraid/commctrl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index d2029db..7e6c76d 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -499,9 +499,9 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 	/*
 	 *	Allocate and initialize a Fib then setup a SRB command
 	 */
-	if (!(srbfib = aac_fib_alloc(dev))) {
+	srbfib = aac_fib_alloc(dev);
+	if (!srbfib)
 		return -ENOMEM;
-	}
 	aac_fib_init(srbfib);
 	/* raw_srb FIB is not FastResponseCapable */
 	srbfib->hw_fib_va->header.XferState &= ~cpu_to_le32(FastResponseCapable);
-- 
2.9.3

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