Merge tag 'regmap-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull regmap fixes from Mark Brown:
 "A couple of substantial fixes here, one from Doug which fixes the
  debugfs code for MMIO regmaps (fortunately not the common case) and
  one from Marc fixing lookups of multiple regmaps for the same device
  (a very unusual case).

  There's also a fix for Kconfig to ensure we enable SoundWire properly"

* tag 'regmap-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: debugfs: Don't sleep while atomic for fast_io regmaps
  regmap: add missing dependency on SoundWire
  regmap: dev_get_regmap_match(): fix string comparison

diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index 0fd6f97..1d1d26b 100644 (file)
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -4,7 +4,7 @@
 # subsystems should select the appropriate symbols.
 
 config REGMAP
-       default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_SCCB || REGMAP_I3C)
+       default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_SOUNDWIRE || REGMAP_SCCB || REGMAP_I3C)
        select IRQ_DOMAIN if REGMAP_IRQ
        bool
 

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 089e5dc..f58baff 100644 (file)
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -463,29 +463,31 @@ static ssize_t regmap_cache_only_write_file(struct file *file,
 {
        struct regmap *map = container_of(file->private_data,
                                          struct regmap, cache_only);
-       ssize_t result;
-       bool was_enabled, require_sync = false;
+       bool new_val, require_sync = false;
        int err;
 
-       map->lock(map->lock_arg);
+       err = kstrtobool_from_user(user_buf, count, &new_val);
+       /* Ignore malforned data like debugfs_write_file_bool() */
+       if (err)
+               return count;
 
-       was_enabled = map->cache_only;
+       err = debugfs_file_get(file->f_path.dentry);
+       if (err)
+               return err;
 
-       result = debugfs_write_file_bool(file, user_buf, count, ppos);
-       if (result < 0) {
-               map->unlock(map->lock_arg);
-               return result;
-       }
+       map->lock(map->lock_arg);
 
-       if (map->cache_only && !was_enabled) {
+       if (new_val && !map->cache_only) {
                dev_warn(map->dev, "debugfs cache_only=Y forced\n");
                add_taint(TAINT_USER, LOCKDEP_STILL_OK);
-       } else if (!map->cache_only && was_enabled) {
+       } else if (!new_val && map->cache_only) {
                dev_warn(map->dev, "debugfs cache_only=N forced: syncing cache\n");
                require_sync = true;
        }
+       map->cache_only = new_val;
 
        map->unlock(map->lock_arg);
+       debugfs_file_put(file->f_path.dentry);
 
        if (require_sync) {
                err = regcache_sync(map);
@@ -493,7 +495,7 @@ static ssize_t regmap_cache_only_write_file(struct file *file,
                        dev_err(map->dev, "Failed to sync cache %d\n", err);
        }
 
-       return result;
+       return count;
 }
 
 static const struct file_operations regmap_cache_only_fops = {
@@ -508,28 +510,32 @@ static ssize_t regmap_cache_bypass_write_file(struct file *file,
 {
        struct regmap *map = container_of(file->private_data,
                                          struct regmap, cache_bypass);
-       ssize_t result;
-       bool was_enabled;
+       bool new_val;
+       int err;
 
-       map->lock(map->lock_arg);
+       err = kstrtobool_from_user(user_buf, count, &new_val);
+       /* Ignore malforned data like debugfs_write_file_bool() */
+       if (err)
+               return count;
 
-       was_enabled = map->cache_bypass;
+       err = debugfs_file_get(file->f_path.dentry);
+       if (err)
+               return err;
 
-       result = debugfs_write_file_bool(file, user_buf, count, ppos);
-       if (result < 0)
-               goto out;
+       map->lock(map->lock_arg);
 
-       if (map->cache_bypass && !was_enabled) {
+       if (new_val && !map->cache_bypass) {
                dev_warn(map->dev, "debugfs cache_bypass=Y forced\n");
                add_taint(TAINT_USER, LOCKDEP_STILL_OK);
-       } else if (!map->cache_bypass && was_enabled) {
+       } else if (!new_val && map->cache_bypass) {
                dev_warn(map->dev, "debugfs cache_bypass=N forced\n");
        }
+       map->cache_bypass = new_val;
 
-out:
        map->unlock(map->lock_arg);
+       debugfs_file_put(file->f_path.dentry);
 
-       return result;
+       return count;
 }
 
 static const struct file_operations regmap_cache_bypass_fops = {

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 06a7968..795a62a 100644 (file)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1364,7 +1364,7 @@ static int dev_get_regmap_match(struct device *dev, void *res, void *data)
 
        /* If the user didn't specify a name match any */
        if (data)
-               return (*r)->name == data;
+               return !strcmp((*r)->name, data);
        else
                return 1;
 }