From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx> Date: Fri, 6 Feb 2015 22:44:23 +0100 The vfree() function was called in three cases by the qla4xxx_sysfs_ddb_logout() function during error handling even if the passed variables "flash_tddb" and "tmp_tddb" contained still a null pointer. * This implementation detail could be improved by adjustments for jump labels. * Let us return immediately after the first failed function call according to the current Linux coding style convention. * Delete also an unnecessary check for the variable "fw_ddb_entry" there. Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx> --- drivers/scsi/qla4xxx/ql4_os.c | 35 +++++++++++++++++------------------ 1 file changed, 17 insertions(+), 18 deletions(-) diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index e508bc9..802390b 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -7699,23 +7699,22 @@ static int qla4xxx_sysfs_ddb_logout(struct iscsi_bus_flash_session *fnode_sess, { struct Scsi_Host *shost = iscsi_flash_session_to_shost(fnode_sess); struct scsi_qla_host *ha = to_qla_host(shost); - struct ql4_tuple_ddb *flash_tddb = NULL; - struct ql4_tuple_ddb *tmp_tddb = NULL; - struct dev_db_entry *fw_ddb_entry = NULL; - struct ddb_entry *ddb_entry = NULL; dma_addr_t fw_ddb_dma; uint32_t next_idx = 0; uint32_t state = 0, conn_err = 0; uint16_t conn_id = 0; int idx, index; int status, ret = 0; + struct ql4_tuple_ddb *flash_tddb; + struct ql4_tuple_ddb *tmp_tddb; + struct ddb_entry *ddb_entry; + struct dev_db_entry *fw_ddb_entry = dma_pool_alloc(ha->fw_ddb_dma_pool, + GFP_KERNEL, + &fw_ddb_dma); - fw_ddb_entry = dma_pool_alloc(ha->fw_ddb_dma_pool, GFP_KERNEL, - &fw_ddb_dma); - if (fw_ddb_entry == NULL) { + if (!fw_ddb_entry) { ql4_printk(KERN_ERR, ha, "%s:Out of memory\n", __func__); - ret = -ENOMEM; - goto exit_ddb_logout; + return -ENOMEM; } flash_tddb = vzalloc(sizeof(*flash_tddb)); @@ -7723,7 +7722,7 @@ static int qla4xxx_sysfs_ddb_logout(struct iscsi_bus_flash_session *fnode_sess, ql4_printk(KERN_WARNING, ha, "%s:Memory Allocation failed.\n", __func__); ret = -ENOMEM; - goto exit_ddb_logout; + goto free_pool; } tmp_tddb = vzalloc(sizeof(*tmp_tddb)); @@ -7731,7 +7730,7 @@ static int qla4xxx_sysfs_ddb_logout(struct iscsi_bus_flash_session *fnode_sess, ql4_printk(KERN_WARNING, ha, "%s:Memory Allocation failed.\n", __func__); ret = -ENOMEM; - goto exit_ddb_logout; + goto free_flash; } if (!fnode_sess->targetname) { @@ -7739,7 +7738,7 @@ static int qla4xxx_sysfs_ddb_logout(struct iscsi_bus_flash_session *fnode_sess, "%s:Cannot logout from SendTarget entry\n", __func__); ret = -EPERM; - goto exit_ddb_logout; + goto free_tmp; } if (fnode_sess->is_boot_target) { @@ -7747,7 +7746,7 @@ static int qla4xxx_sysfs_ddb_logout(struct iscsi_bus_flash_session *fnode_sess, "%s: Logout from boot target entry is not permitted.\n", __func__); ret = -EPERM; - goto exit_ddb_logout; + goto free_tmp; } strlcpy(flash_tddb->iscsi_name, fnode_sess->targetname, @@ -7794,12 +7793,12 @@ static int qla4xxx_sysfs_ddb_logout(struct iscsi_bus_flash_session *fnode_sess, if (idx == MAX_DDB_ENTRIES) ret = -ESRCH; -exit_ddb_logout: - vfree(flash_tddb); +free_tmp: vfree(tmp_tddb); - if (fw_ddb_entry) - dma_pool_free(ha->fw_ddb_dma_pool, fw_ddb_entry, fw_ddb_dma); - +free_flash: + vfree(flash_tddb); +free_pool: + dma_pool_free(ha->fw_ddb_dma_pool, fw_ddb_entry, fw_ddb_dma); return ret; } -- 2.2.2 -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html