firmware: arm_scpi: remove usage of drvdata and don't reset scpi_info to null

There's no benefit using drvdata as variable scpi_info is global.

Setting scpi_info to NULL in scpi_remove isn't needed too. If arm_scpi
is built-in, then this code is never used. And if arm_scpi is built as
a module and some other module calls get_scpi_ops() then due to this
dependency scpi_remove is called only after the other module has been
removed.

Last but not least, users usually store the result of get_scpi_ops(),
therefore setting scpi_info to NULL wouldn't really help.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
[sudeep.holla: reworded the commit log a bit]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c
index 7da9f1b..a7f686e 100644 (file)
--- a/drivers/firmware/arm_scpi.c
+++ b/drivers/firmware/arm_scpi.c
@@ -862,8 +862,6 @@ static int scpi_init_versions(struct scpi_drvinfo *info)
 static ssize_t protocol_version_show(struct device *dev,
                                     struct device_attribute *attr, char *buf)
 {
-       struct scpi_drvinfo *scpi_info = dev_get_drvdata(dev);
-
        return sprintf(buf, "%d.%d\n",
                       PROTOCOL_REV_MAJOR(scpi_info->protocol_version),
                       PROTOCOL_REV_MINOR(scpi_info->protocol_version));
@@ -873,8 +871,6 @@ static DEVICE_ATTR_RO(protocol_version);
 static ssize_t firmware_version_show(struct device *dev,
                                     struct device_attribute *attr, char *buf)
 {
-       struct scpi_drvinfo *scpi_info = dev_get_drvdata(dev);
-
        return sprintf(buf, "%d.%d.%d\n",
                       FW_REV_MAJOR(scpi_info->firmware_version),
                       FW_REV_MINOR(scpi_info->firmware_version),
@@ -905,21 +901,17 @@ static int scpi_remove(struct platform_device *pdev)
 {
        int i;
        struct device *dev = &pdev->dev;
-       struct scpi_drvinfo *info = platform_get_drvdata(pdev);
-
-       scpi_info = NULL; /* stop exporting SCPI ops through get_scpi_ops */
 
        of_platform_depopulate(dev);
        sysfs_remove_groups(&dev->kobj, versions_groups);
-       scpi_free_channels(dev, info->channels, info->num_chans);
-       platform_set_drvdata(pdev, NULL);
+       scpi_free_channels(dev, scpi_info->channels, scpi_info->num_chans);
 
-       for (i = 0; i < MAX_DVFS_DOMAINS && info->dvfs[i]; i++) {
-               kfree(info->dvfs[i]->opps);
-               kfree(info->dvfs[i]);
+       for (i = 0; i < MAX_DVFS_DOMAINS && scpi_info->dvfs[i]; i++) {
+               kfree(scpi_info->dvfs[i]->opps);
+               kfree(scpi_info->dvfs[i]);
        }
-       devm_kfree(dev, info->channels);
-       devm_kfree(dev, info);
+       devm_kfree(dev, scpi_info->channels);
+       devm_kfree(dev, scpi_info);
 
        return 0;
 }
@@ -1027,8 +1019,6 @@ err:
        scpi_info->num_chans = count;
        scpi_info->commands = scpi_std_commands;
 
-       platform_set_drvdata(pdev, scpi_info);
-
        if (scpi_info->is_legacy) {
                /* Replace with legacy variants */
                scpi_ops.clk_set_val = legacy_scpi_clk_set_val;