[cryptodev PATCH] qat: fix bad unlock balance
From: Bruce Allan <hidden>
Date: 2014-10-15 18:33:11
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
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 <redacted> --- 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; }