Add proper check for running out of bitmap slot and disallow exceeding
the max adapters limit.
Signed-off-by: Akinobu Mita <akinobu.m...@gmail.com>
Cc: Anil Ravindranath <anil_ravindran...@pmc-sierra.com>
Cc: "James E.J. Bottomley" <jbottom...@parallels.com>
Cc: linux-scsi@vger.kernel.org
---
drivers/scsi/pmcraid.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index 583ec82..e3b68d9 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -5372,8 +5372,10 @@ static unsigned short pmcraid_get_minor(void)
{
int minor;
- minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
- __set_bit(minor, pmcraid_minor);
+ minor = find_first_zero_bit(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
+ if (minor < PMCRAID_MAX_ADAPTERS)
+ __set_bit(minor, pmcraid_minor);
+
return minor;
}
@@ -5399,6 +5401,9 @@ static int pmcraid_setup_chrdev(struct pmcraid_instance
*pinstance)
int error;
minor = pmcraid_get_minor();
+ if (minor >= PMCRAID_MAX_ADAPTERS)
+ return -EBUSY;
+
cdev_init(&pinstance->cdev, &pmcraid_fops);
pinstance->cdev.owner = THIS_MODULE;
--
1.8.1
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