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