[PATCH V5 07/10] aacraid: Created new mutex for ioctl path

Raghava Aditya Renukunta
2016-02-03T00:48:04Z

aac_mutex was used to create protect the ioctl path for only the
compat path, it would be make more sense to place mutex in
aac_do_ioctl, which is the main ioctl function call that handles
all ioctl commands.

Created new mutex ioctl_mutex in struct aac_dev to protect switch
case in aac_do_ioctl and removed aac_mutex from aac_cfg_ioctl and
aac_compat_do_ioctl

Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@pmcs.com>
---
drivers/scsi/aacraid/aacraid.h | 1 +
drivers/scsi/aacraid/commctrl.c | 4 ++++
drivers/scsi/aacraid/linit.c | 12 ++----------
3 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index 2916288..75bc65e 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -1124,6 +1124,7 @@ struct aac_dev
struct fib *free_fib;
spinlock_t fib_lock;

+ struct mutex ioctl_mutex;
struct aac_queue_block *queues;
/*
* The user API will use an IOCTL to register itself to receive
diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index 54195a1..4d5f4e7 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -855,6 +855,8 @@ int aac_do_ioctl(struct aac_dev * dev, int cmd, void __user *arg)
{
int status;

+ mutex_lock(&dev->ioctl_mutex);
+
/*
* HBA gets first crack
*/
@@ -890,6 +892,8 @@ int aac_do_ioctl(struct aac_dev * dev, int cmd, void __user *arg)
status = -ENOTTY;
break;
}
+ mutex_unlock(&dev->ioctl_mutex);
+
return status;
}

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 48e2a79..5f08bcf 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -703,23 +703,15 @@ static int aac_cfg_open(struct inode *inode, struct file *file)
static long aac_cfg_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
- int ret;
- struct aac_dev *aac;
- aac = (struct aac_dev *)file->private_data;
if (!capable(CAP_SYS_RAWIO) || aac->adapter_shutdown)
return -EPERM;
- mutex_lock(&aac_mutex);
- ret = aac_do_ioctl(file->private_data, cmd, (void __user *)arg);
- mutex_unlock(&aac_mutex);
-
- return ret;
+ return aac_do_ioctl(file->private_data, cmd, (void __user *)arg);
}

#ifdef CONFIG_COMPAT
static long aac_compat_do_ioctl(struct aac_dev *dev, unsigned cmd, unsigned long arg)
{
long ret;
- mutex_lock(&aac_mutex);
switch (cmd) {
case FSACTL_MINIPORT_REV_CHECK:
case FSACTL_SENDFIB:
@@ -753,7 +745,6 @@ static long aac_compat_do_ioctl(struct aac_dev *dev, unsigned cmd, unsigned long
ret = -ENOIOCTLCMD;
break;
}
- mutex_unlock(&aac_mutex);
return ret;
}

@@ -1194,6 +1185,7 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
goto out_free_host;
spin_lock_init(&aac->fib_lock);

+ mutex_init(&aac->ioctl_mutex);
/*
* Map in the registers from the adapter.
*/
--
1.9.1