linux-kernel - [PATCH] media: intel/ipu6: Fix an error handling path in isys

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Date: Mon, 20 May 2024 12:32:30 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Bingbu Cao <bingbu.cao@...el.com>,
	Tianshu Qiu <tian.shu.qiu@...el.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Hans Verkuil <hverkuil-cisco@...all.nl>
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	linux-media@...r.kernel.org
Subject: [PATCH] media: intel/ipu6: Fix an error handling path in isys_probe()

If an error occurs after a successful alloc_fw_msg_bufs() call, some
resources should be released as already done in the remove function.

Fixes: f50c4ca0a820 ("media: intel/ipu6: add the main input system driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested only
---
 drivers/media/pci/intel/ipu6/ipu6-isys.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/media/pci/intel/ipu6/ipu6-isys.c b/drivers/media/pci/intel/ipu6/ipu6-isys.c
index 5992138c7290..d9e1e1a135b9 100644
--- a/drivers/media/pci/intel/ipu6/ipu6-isys.c
+++ b/drivers/media/pci/intel/ipu6/ipu6-isys.c
@@ -1062,6 +1062,7 @@ static int isys_probe(struct auxiliary_device *auxdev,
 	const struct ipu6_isys_internal_csi2_pdata *csi2_pdata;
 	struct ipu6_bus_device *adev = auxdev_to_adev(auxdev);
 	struct ipu6_device *isp = adev->isp;
+	struct isys_fw_msgs *fwmsg, *safe;
 	const struct firmware *fw;
 	struct ipu6_isys *isys;
 	unsigned int i;
@@ -1140,12 +1141,17 @@ static int isys_probe(struct auxiliary_device *auxdev,
 
 	ret = isys_register_devices(isys);
 	if (ret)
-		goto out_remove_pkg_dir_shared_buffer;
+		goto free_fw_msg_bufs;
 
 	ipu6_mmu_hw_cleanup(adev->mmu);
 
 	return 0;
 
+free_fw_msg_bufs:
+	list_for_each_entry_safe(fwmsg, safe, &isys->framebuflist, head)
+		dma_free_attrs(&auxdev->dev, sizeof(struct isys_fw_msgs),
+			       fwmsg, fwmsg->dma_addr, 0);
+
 out_remove_pkg_dir_shared_buffer:
 	if (!isp->secure_mode)
 		ipu6_cpd_free_pkg_dir(adev);
-- 
2.45.1