diff options
Diffstat (limited to 'mali_kbase/ipa/mali_kbase_ipa_debugfs.c')
| -rw-r--r-- | mali_kbase/ipa/mali_kbase_ipa_debugfs.c | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/mali_kbase/ipa/mali_kbase_ipa_debugfs.c b/mali_kbase/ipa/mali_kbase_ipa_debugfs.c index d3ac7c3..029023c 100644 --- a/mali_kbase/ipa/mali_kbase_ipa_debugfs.c +++ b/mali_kbase/ipa/mali_kbase_ipa_debugfs.c @@ -7,14 +7,19 @@ * Foundation, and any use by you of this program is subject to the terms * of such GNU licence. * - * A copy of the licence is included with the program, and can also be obtained - * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, - * Boston, MA 02110-1301, USA. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, you can access it online at + * http://www.gnu.org/licenses/gpl-2.0.html. + * + * SPDX-License-Identifier: GPL-2.0 * */ - - #include <linux/debugfs.h> #include <linux/list.h> #include <linux/mutex.h> @@ -56,14 +61,18 @@ static int param_int_set(void *data, u64 val) struct kbase_ipa_model_param *param = data; struct kbase_ipa_model *model = param->model; s64 sval = (s64) val; + s32 old_val; int err = 0; if (sval < S32_MIN || sval > S32_MAX) return -ERANGE; mutex_lock(¶m->model->kbdev->ipa.lock); + old_val = *param->addr.s32p; *param->addr.s32p = val; err = kbase_ipa_model_recalculate(model); + if (err < 0) + *param->addr.s32p = old_val; mutex_unlock(¶m->model->kbdev->ipa.lock); return err; @@ -92,6 +101,7 @@ static ssize_t param_string_set(struct file *file, const char __user *user_buf, { struct kbase_ipa_model_param *param = file->private_data; struct kbase_ipa_model *model = param->model; + char *old_str = NULL; ssize_t ret = count; size_t buf_size; int err; @@ -103,6 +113,12 @@ static ssize_t param_string_set(struct file *file, const char __user *user_buf, goto end; } + old_str = kstrndup(param->addr.str, param->size, GFP_KERNEL); + if (!old_str) { + ret = -ENOMEM; + goto end; + } + buf_size = min(param->size - 1, count); if (copy_from_user(param->addr.str, user_buf, buf_size)) { ret = -EFAULT; @@ -112,10 +128,13 @@ static ssize_t param_string_set(struct file *file, const char __user *user_buf, param->addr.str[buf_size] = '\0'; err = kbase_ipa_model_recalculate(model); - if (err < 0) + if (err < 0) { ret = err; + strlcpy(param->addr.str, old_str, param->size); + } end: + kfree(old_str); mutex_unlock(&model->kbdev->ipa.lock); return ret; |