2014-10-15 18:33:11

by Allan, Bruce W

Subject: [cryptodev PATCH] qat: fix bad unlock balance

The mutex table_lock is unlocked in two functions without first being locked.
Fix the functions to properly protect the accel_table with the table_lock.

Also, fix a spelling error in one of the function's header comment.

Signed-off-by: Bruce Allan <[email protected]>
---

drivers/crypto/qat/qat_common/adf_dev_mgr.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/qat/qat_common/adf_dev_mgr.c b/drivers/crypto/qat/qat_common/adf_dev_mgr.c
index ae71555..4a0a829d 100644
--- a/drivers/crypto/qat/qat_common/adf_dev_mgr.c
+++ b/drivers/crypto/qat/qat_common/adf_dev_mgr.c
@@ -129,12 +129,13 @@ struct adf_accel_dev *adf_devmgr_get_first(void)
* Function returns acceleration device associated with the given pci device.
* To be used by QAT device specific drivers.
*
- * Return: pinter to accel_dev or NULL if not found.
+ * Return: pointer to accel_dev or NULL if not found.
*/
struct adf_accel_dev *adf_devmgr_pci_to_accel_dev(struct pci_dev *pci_dev)
{
struct list_head *itr;

+ mutex_lock(&table_lock);
list_for_each(itr, &accel_table) {
struct adf_accel_dev *ptr =
list_entry(itr, struct adf_accel_dev, list);
@@ -144,6 +145,7 @@ struct adf_accel_dev *adf_devmgr_pci_to_accel_dev(struct pci_dev *pci_dev)
return ptr;
}
}
+ mutex_unlock(&table_lock);
return NULL;
}
EXPORT_SYMBOL_GPL(adf_devmgr_pci_to_accel_dev);
@@ -152,6 +154,7 @@ struct adf_accel_dev *adf_devmgr_get_dev_by_id(uint32_t id)
{
struct list_head *itr;

+ mutex_lock(&table_lock);
list_for_each(itr, &accel_table) {
struct adf_accel_dev *ptr =
list_entry(itr, struct adf_accel_dev, list);
@@ -161,6 +164,7 @@ struct adf_accel_dev *adf_devmgr_get_dev_by_id(uint32_t id)
return ptr;
}
}
+ mutex_unlock(&table_lock);
return NULL;
}

2014-10-24 14:54:52

by Herbert Xu

Subject: Re: [cryptodev PATCH] qat: fix bad unlock balance

On Wed, Oct 15, 2014 at 11:33:15AM -0700, Bruce Allan wrote:
> The mutex table_lock is unlocked in two functions without first being locked.
> Fix the functions to properly protect the accel_table with the table_lock.
>
> Also, fix a spelling error in one of the function's header comment.
>
> Signed-off-by: Bruce Allan <[email protected]>

Applied.
--
Email: Herbert Xu <[email protected]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt