diff options
| -rw-r--r-- | drivers/firmware/cirrus/cs_dsp.c | 45 | ||||
| -rw-r--r-- | include/linux/firmware/cirrus/cs_dsp.h | 4 |
2 files changed, 23 insertions, 26 deletions
diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c index f51047d8ea64..58e41751dbc1 100644 --- a/drivers/firmware/cirrus/cs_dsp.c +++ b/drivers/firmware/cirrus/cs_dsp.c @@ -9,6 +9,7 @@ * Cirrus Logic International Semiconductor Ltd. */ +#include <linux/cleanup.h> #include <linux/ctype.h> #include <linux/debugfs.h> #include <linux/delay.h> @@ -410,24 +411,30 @@ static void cs_dsp_debugfs_clear(struct cs_dsp *dsp) dsp->bin_file_name = NULL; } +static ssize_t cs_dsp_debugfs_string_read(struct cs_dsp *dsp, + char __user *user_buf, + size_t count, loff_t *ppos, + const char **pstr) +{ + const char *str; + + scoped_guard(mutex, &dsp->pwr_lock) { + str = *pstr; + if (!str) + return 0; + + return simple_read_from_buffer(user_buf, count, ppos, str, strlen(str)); + } +} + static ssize_t cs_dsp_debugfs_wmfw_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct cs_dsp *dsp = file->private_data; - ssize_t ret; - mutex_lock(&dsp->pwr_lock); - - if (!dsp->wmfw_file_name || !dsp->booted) - ret = 0; - else - ret = simple_read_from_buffer(user_buf, count, ppos, - dsp->wmfw_file_name, - strlen(dsp->wmfw_file_name)); - - mutex_unlock(&dsp->pwr_lock); - return ret; + return cs_dsp_debugfs_string_read(dsp, user_buf, count, ppos, + &dsp->wmfw_file_name); } static ssize_t cs_dsp_debugfs_bin_read(struct file *file, @@ -435,19 +442,9 @@ static ssize_t cs_dsp_debugfs_bin_read(struct file *file, size_t count, loff_t *ppos) { struct cs_dsp *dsp = file->private_data; - ssize_t ret; - - mutex_lock(&dsp->pwr_lock); - if (!dsp->bin_file_name || !dsp->booted) - ret = 0; - else - ret = simple_read_from_buffer(user_buf, count, ppos, - dsp->bin_file_name, - strlen(dsp->bin_file_name)); - - mutex_unlock(&dsp->pwr_lock); - return ret; + return cs_dsp_debugfs_string_read(dsp, user_buf, count, ppos, + &dsp->bin_file_name); } static const struct { diff --git a/include/linux/firmware/cirrus/cs_dsp.h b/include/linux/firmware/cirrus/cs_dsp.h index a66eb7624730..69959032f8f5 100644 --- a/include/linux/firmware/cirrus/cs_dsp.h +++ b/include/linux/firmware/cirrus/cs_dsp.h @@ -188,8 +188,8 @@ struct cs_dsp { #ifdef CONFIG_DEBUG_FS struct dentry *debugfs_root; - char *wmfw_file_name; - char *bin_file_name; + const char *wmfw_file_name; + const char *bin_file_name; #endif }; |