From: Bharat Nihalani <bnihalani@xxxxxxxxxx>
The kernel command line parameter debugfs=off can be used to dynamically
disable debugfs support at boot time. However, the Tegra PMC driver will
always attempt to register debugfs entries if CONFIG_DEBUG_FS is
enabled. Therefore, if CONFIG_DEBUG_FS is enabled but the user sets
debugfs=off, then probing the PMC driver will fail.
Fix this by using the function debugfs_initialized() to check if debugfs
support is enabled before calling any debugfs functions in the Tegra PMC
driver. Note that if CONFIG_DEBUG_FS is not defined
debugfs_initialized() will return false.
Signed-off-by: Bharat Nihalani <bnihalani@xxxxxxxxxx>
Signed-off-by: Kartik <kkartik@xxxxxxxxxx>
Co-developed-by: Jon Hunter <jonathanh@xxxxxxxxxx>
Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx>
---
drivers/soc/tegra/pmc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 5d17799524c9..12e852a8a609 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -3026,7 +3026,7 @@ static int tegra_pmc_probe(struct platform_device *pdev)
tegra_pmc_reset_sysfs_init(pmc);
- if (IS_ENABLED(CONFIG_DEBUG_FS)) {
+ if (debugfs_initialized()) {
err = tegra_powergate_debugfs_init();
if (err < 0)
goto cleanup_sysfs;
--
2.34.1
