firmware: allocate firmware id dynamically
The firmware loader has a statically allocated 30 bytes long string for
the firmware id (a.k.a. the firmware file name). There is no reason why
we couldnt allocate it dynamically, and avoid having restrictions on the
firmware names lengths.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Cc: Marcel Holtmann <holtmann@linux.intel.com>
Cc: Zhu Yi <yi.zhu@intel.com>,
Cc: John Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 2427702..3591ba7 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -40,7 +40,7 @@
static DEFINE_MUTEX(fw_lock);
struct firmware_priv {
- char fw_id[FIRMWARE_NAME_MAX];
+ char *fw_id;
struct completion completion;
struct bin_attribute attr_data;
struct firmware *fw;
@@ -355,6 +355,7 @@
for (i = 0; i < fw_priv->nr_pages; i++)
__free_page(fw_priv->pages[i]);
kfree(fw_priv->pages);
+ kfree(fw_priv->fw_id);
kfree(fw_priv);
put_device(dev);
@@ -386,7 +387,13 @@
init_completion(&fw_priv->completion);
fw_priv->attr_data = firmware_attr_data_tmpl;
- strlcpy(fw_priv->fw_id, fw_name, FIRMWARE_NAME_MAX);
+ fw_priv->fw_id = kstrdup(fw_name, GFP_KERNEL);
+ if (!fw_priv->fw_id) {
+ dev_err(device, "%s: Firmware name allocation failed\n",
+ __func__);
+ retval = -ENOMEM;
+ goto error_kfree;
+ }
fw_priv->timeout.function = firmware_class_timeout;
fw_priv->timeout.data = (u_long) fw_priv;
@@ -401,14 +408,15 @@
if (retval) {
dev_err(device, "%s: device_register failed\n", __func__);
put_device(f_dev);
- goto error_kfree1;
+ goto error_kfree_fw_id;
}
*dev_p = f_dev;
return 0;
+error_kfree_fw_id:
+ kfree(fw_priv->fw_id);
error_kfree:
kfree(f_dev);
-error_kfree1:
kfree(fw_priv);
return retval;
}