[PATCH 2/2] cciss: fix regression firmware version not displayed in procfs (again and again)

[PATCH 2/2] cciss: fix regression firmware version not displayed in procfs (again and again)

[Mike Miller]

Patch 2 of 2

The regression was introduced by commit
6ae5ce8e8d4de666f31286808d2285aa6a50fa40.
This patch fixes a regression where the controller firmware version is not
displayed in procfs. The previous patch would be called anytime something
changed. This will get called only once for each controller.

This one addresses the un-needed initialization and the freeing of inq_buf.

Please consider this for inclusion.

Signed-off-by: Mike Miller <mike.miller@hp.com>

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 0f367b1..c3f0c17 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3404,7 +3404,8 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	int i;
 	int j = 0;
 	int rc;
-	int dac;
+	int dac, return_code;
+	InquiryData_struct *inq_buff;
 
 	i = alloc_cciss_hba();
 	if (i < 0)
@@ -3510,6 +3511,25 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	/* Turn the interrupts on so we can service requests */
 	hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
 
+	/* Get the firmware version */
+	inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
+	if (inq_buff == NULL) {
+		printk(KERN_ERR "cciss: out of memory\n");
+		return -ENOMEM;
+	}
+
+	return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
+		sizeof(InquiryData_struct), 0, 0 , 0, TYPE_CMD);
+	if (return_code == IO_OK) {
+		hba[i]->firm_ver[0] = inq_buff->data_byte[32];
+		hba[i]->firm_ver[1] = inq_buff->data_byte[33];
+		hba[i]->firm_ver[2] = inq_buff->data_byte[34];
+		hba[i]->firm_ver[3] = inq_buff->data_byte[35];
+	} else {	 /* send command failed */
+		printk(KERN_WARNING "cciss: unable to determine firmware"
+			" version of controller\n");
+	}
+
 	cciss_procinit(i);
 
 	hba[i]->cciss_max_sectors = 2048;
@@ -3520,6 +3540,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	return 1;
 
 clean4:
+	kfree(inq_buff);
 #ifdef CONFIG_CISS_SCSI_TAPE
 	kfree(hba[i]->scsi_rejects.complete);
 #endif

Re: [PATCH 2/2] cciss: fix regression firmware version not displayed in procfs (again and again)

[FUJITA Tomonori]

On Thu, 16 Oct 2008 18:17:30 -0500
Mike Miller <mike.miller@hp.com> wrote:

> Patch 2 of 2
> 
> The regression was introduced by commit
> 6ae5ce8e8d4de666f31286808d2285aa6a50fa40.
> This patch fixes a regression where the controller firmware version is not
> displayed in procfs. The previous patch would be called anytime something
> changed. This will get called only once for each controller.
> 
> This one addresses the un-needed initialization and the freeing of inq_buf.
> 
> Please consider this for inclusion.
> 
> Signed-off-by: Mike Miller <mike.miller@hp.com>
> 
> diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
> index 0f367b1..c3f0c17 100644
> --- a/drivers/block/cciss.c
> +++ b/drivers/block/cciss.c
> @@ -3404,7 +3404,8 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
>  	int i;
>  	int j = 0;
>  	int rc;
> -	int dac;
> +	int dac, return_code;
> +	InquiryData_struct *inq_buff;

Needs to be:

> +	InquiryData_struct *inq_buff = NULL;

The driver uses 'goto clean4' before calling kzalloc for inq_buff
(e.g. in the case of cmd_pool_bits allocation failure). It means that
you could kfree with an uninitialized address?


>  	i = alloc_cciss_hba();
>  	if (i < 0)
> @@ -3510,6 +3511,25 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
>  	/* Turn the interrupts on so we can service requests */
>  	hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
>  
> +	/* Get the firmware version */
> +	inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
> +	if (inq_buff == NULL) {
> +		printk(KERN_ERR "cciss: out of memory\n");
> +		return -ENOMEM;

Needs to use 'goto clean4' instead of just return -ENOMEM here? The
driver needs to clean up the allocated resource.


> +	}
> +
> +	return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
> +		sizeof(InquiryData_struct), 0, 0 , 0, TYPE_CMD);
> +	if (return_code == IO_OK) {
> +		hba[i]->firm_ver[0] = inq_buff->data_byte[32];
> +		hba[i]->firm_ver[1] = inq_buff->data_byte[33];
> +		hba[i]->firm_ver[2] = inq_buff->data_byte[34];
> +		hba[i]->firm_ver[3] = inq_buff->data_byte[35];
> +	} else {	 /* send command failed */
> +		printk(KERN_WARNING "cciss: unable to determine firmware"
> +			" version of controller\n");
> +	}
> +
>  	cciss_procinit(i);
>  
>  	hba[i]->cciss_max_sectors = 2048;
> @@ -3520,6 +3540,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
>  	return 1;
>  
>  clean4:
> +	kfree(inq_buff);
>  #ifdef CONFIG_CISS_SCSI_TAPE
>  	kfree(hba[i]->scsi_rejects.complete);
>  #endif
> --
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