Merge tag 'driver-core-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core / sysfs patches from Greg KH:
 "Here's the big driver core / sysfs update for 3.13-rc1.

  There's lots of dev_groups updates for different subsystems, as they
  all get slowly migrated over to the safe versions of the attribute
  groups (removing userspace races with the creation of the sysfs
  files.) Also in here are some kobject updates, devres expansions, and
  the first round of Tejun's sysfs reworking to enable it to be used by
  other subsystems as a backend for an in-kernel filesystem.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'driver-core-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (83 commits)
  sysfs: rename sysfs_assoc_lock and explain what it's about
  sysfs: use generic_file_llseek() for sysfs_file_operations
  sysfs: return correct error code on unimplemented mmap()
  mdio_bus: convert bus code to use dev_groups
  device: Make dev_WARN/dev_WARN_ONCE print device as well as driver name
  sysfs: separate out dup filename warning into a separate function
  sysfs: move sysfs_hash_and_remove() to fs/sysfs/dir.c
  sysfs: remove unused sysfs_get_dentry() prototype
  sysfs: honor bin_attr.attr.ignore_lockdep
  sysfs: merge sysfs_elem_bin_attr into sysfs_elem_attr
  devres: restore zeroing behavior of devres_alloc()
  sysfs: fix sysfs_write_file for bin file
  input: gameport: convert bus code to use dev_groups
  input: serio: remove bus usage of dev_attrs
  input: serio: use DEVICE_ATTR_RO()
  i2o: convert bus code to use dev_groups
  memstick: convert bus code to use dev_groups
  tifm: convert bus code to use dev_groups
  virtio: convert bus code to use dev_groups
  ipack: convert bus code to use dev_groups
  ...

1 files changed, 25 insertions, 13 deletions

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 10a4467..eb8fb94 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -282,31 +282,35 @@ static noinline_for_stack long fw_file_size(struct file *file)
 	return st.size;
 }
 
-static bool fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
+static int fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
 {
 	long size;
 	char *buf;
+	int rc;
 
 	size = fw_file_size(file);
 	if (size <= 0)
-		return false;
+		return -EINVAL;
 	buf = vmalloc(size);
 	if (!buf)
-		return false;
-	if (kernel_read(file, 0, buf, size) != size) {
+		return -ENOMEM;
+	rc = kernel_read(file, 0, buf, size);
+	if (rc != size) {
+		if (rc > 0)
+			rc = -EIO;
 		vfree(buf);
-		return false;
+		return rc;
 	}
 	fw_buf->data = buf;
 	fw_buf->size = size;
-	return true;
+	return 0;
 }
 
-static bool fw_get_filesystem_firmware(struct device *device,
+static int fw_get_filesystem_firmware(struct device *device,
 				       struct firmware_buf *buf)
 {
 	int i;
-	bool success = false;
+	int rc = -ENOENT;
 	char *path = __getname();
 
 	for (i = 0; i < ARRAY_SIZE(fw_path); i++) {
@@ -321,14 +325,17 @@ static bool fw_get_filesystem_firmware(struct device *device,
 		file = filp_open(path, O_RDONLY, 0);
 		if (IS_ERR(file))
 			continue;
-		success = fw_read_file_contents(file, buf);
+		rc = fw_read_file_contents(file, buf);
 		fput(file);
-		if (success)
+		if (rc)
+			dev_warn(device, "firmware, attempted to load %s, but failed with error %d\n",
+				path, rc);
+		else
 			break;
 	}
 	__putname(path);
 
-	if (success) {
+	if (!rc) {
 		dev_dbg(device, "firmware: direct-loading firmware %s\n",
 			buf->fw_id);
 		mutex_lock(&fw_lock);
@@ -337,7 +344,7 @@ static bool fw_get_filesystem_firmware(struct device *device,
 		mutex_unlock(&fw_lock);
 	}
 
-	return success;
+	return rc;
 }
 
 /* firmware holds the ownership of pages */
@@ -1086,9 +1093,14 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
 		}
 	}
 
-	if (!fw_get_filesystem_firmware(device, fw->priv))
+	ret = fw_get_filesystem_firmware(device, fw->priv);
+	if (ret) {
+		dev_warn(device, "Direct firmware load failed with error %d\n",
+			 ret);
+		dev_warn(device, "Falling back to user helper\n");
 		ret = fw_load_from_user_helper(fw, name, device,
 					       uevent, nowait, timeout);
+	}
 
 	/* don't cache firmware handled without uevent */
 	if (!ret)