[PATCH] media: bcm2835-unicam: Fix log status runtime access

[Eugen Hristev]

When requesting log status, the block might be powered
off, but registers are being read.
Avoid reading the registers if the device is not
resumed, thus also avoid powering up the device just
for log status.

Fixes: 392cd78d495f ("media: bcm2835-unicam: Add support for CCP2/CSI2 camera interface")
Signed-off-by: Eugen Hristev <ehristev at kernel.org>
---
 drivers/media/platform/broadcom/bcm2835-unicam.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/platform/broadcom/bcm2835-unicam.c b/drivers/media/platform/broadcom/bcm2835-unicam.c
index 8d28ba0b59a3..818694f007e2 100644
--- a/drivers/media/platform/broadcom/bcm2835-unicam.c
+++ b/drivers/media/platform/broadcom/bcm2835-unicam.c
@@ -2052,6 +2052,10 @@ static int unicam_log_status(struct file *file, void *fh)
 		 node->fmt.fmt.pix.width, node->fmt.fmt.pix.height);
 	dev_info(unicam->dev, "V4L2 format:         %08x\n",
 		 node->fmt.fmt.pix.pixelformat);
+
+	if (!pm_runtime_get_if_in_use(unicam->dev))
+		return 0;
+
 	reg = unicam_reg_read(unicam, UNICAM_IPIPE);
 	dev_info(unicam->dev, "Unpacking/packing:   %u / %u\n",
 		 unicam_get_field(reg, UNICAM_PUM_MASK),

---
base-commit: e98d21c170b01ddef366f023bbfcf6b31509fa83
change-id: 20260521-bcmpipm-6c578e73239c

Best regards,
--  
Eugen Hristev <ehristev at kernel.org>