diff options
Diffstat (limited to 'drivers/gpu/arm/midgard/tests/kutf/kutf_utils.c')
-rw-r--r-- | drivers/gpu/arm/midgard/tests/kutf/kutf_utils.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/gpu/arm/midgard/tests/kutf/kutf_utils.c b/drivers/gpu/arm/midgard/tests/kutf/kutf_utils.c new file mode 100644 index 000000000000..a429a2dbf788 --- /dev/null +++ b/drivers/gpu/arm/midgard/tests/kutf/kutf_utils.c @@ -0,0 +1,71 @@ +/* + * + * (C) COPYRIGHT 2014, 2017 ARM Limited. All rights reserved. + * + * This program is free software and is provided to you under the terms of the + * GNU General Public License version 2 as published by the Free Software + * 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. + * + */ + + + +/* Kernel UTF utility functions */ + +#include <linux/mutex.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/printk.h> + +#include <kutf/kutf_utils.h> +#include <kutf/kutf_mem.h> + +static char tmp_buffer[KUTF_MAX_DSPRINTF_LEN]; + +DEFINE_MUTEX(buffer_lock); + +const char *kutf_dsprintf(struct kutf_mempool *pool, + const char *fmt, ...) +{ + va_list args; + int len; + int size; + void *buffer; + + mutex_lock(&buffer_lock); + va_start(args, fmt); + len = vsnprintf(tmp_buffer, sizeof(tmp_buffer), fmt, args); + va_end(args); + + if (len < 0) { + pr_err("kutf_dsprintf: Bad format dsprintf format %s\n", fmt); + goto fail_format; + } + + if (len >= sizeof(tmp_buffer)) { + pr_warn("kutf_dsprintf: Truncated dsprintf message %s\n", fmt); + size = sizeof(tmp_buffer); + } else { + size = len + 1; + } + + buffer = kutf_mempool_alloc(pool, size); + if (!buffer) + goto fail_alloc; + + memcpy(buffer, tmp_buffer, size); + mutex_unlock(&buffer_lock); + + return buffer; + +fail_alloc: +fail_format: + mutex_unlock(&buffer_lock); + return NULL; +} +EXPORT_SYMBOL(kutf_dsprintf); |