This is a note to let you know that I've just added the patch titled
phy: qcom-qmp-usb: fix memleak on probe deferral
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
phy-qcom-qmp-usb-fix-memleak-on-probe-deferral.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e28891255ecb303288fc26a5982f9a3601ef1e35
Author: Johan Hovold <johan+linaro@xxxxxxxxxx>
Date: Fri Sep 16 12:23:35 2022 +0200
phy: qcom-qmp-usb: fix memleak on probe deferral
[ Upstream commit a5d6b1ac56cbd6b5850a3a54e35f1cb71e8e8cdd ]
Switch to using the device-managed of_iomap helper to avoid leaking
memory on probe deferral and driver unbind.
Note that this helper checks for already reserved regions and may fail
if there are multiple devices claiming the same memory.
Two bindings currently rely on overlapping mappings for the PCS region
so fallback to non-exclusive mappings for those for now.
Fixes: e78f3d15e115 ("phy: qcom-qmp: new qmp phy driver for qcom-chipsets")
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220916102340.11520-7-johan+linaro@xxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
index 116f60ef0649..b727dcf4f906 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
@@ -2503,6 +2503,21 @@ static const struct phy_ops qcom_qmp_phy_usb_ops = {
.owner = THIS_MODULE,
};
+static void __iomem *qmp_usb_iomap(struct device *dev, struct device_node *np,
+ int index, bool exclusive)
+{
+ struct resource res;
+
+ if (!exclusive) {
+ if (of_address_to_resource(np, index, &res))
+ return IOMEM_ERR_PTR(-EINVAL);
+
+ return devm_ioremap(dev, res.start, resource_size(&res));
+ }
+
+ return devm_of_iomap(dev, np, index, NULL);
+}
+
static
int qcom_qmp_phy_usb_create(struct device *dev, struct device_node *np, int id,
void __iomem *serdes, const struct qmp_phy_cfg *cfg)
@@ -2510,8 +2525,18 @@ int qcom_qmp_phy_usb_create(struct device *dev, struct device_node *np, int id,
struct qcom_qmp *qmp = dev_get_drvdata(dev);
struct phy *generic_phy;
struct qmp_phy *qphy;
+ bool exclusive = true;
int ret;
+ /*
+ * FIXME: These bindings should be fixed to not rely on overlapping
+ * mappings for PCS.
+ */
+ if (of_device_is_compatible(dev->of_node, "qcom,sdx65-qmp-usb3-uni-phy"))
+ exclusive = false;
+ if (of_device_is_compatible(dev->of_node, "qcom,sm8350-qmp-usb3-uni-phy"))
+ exclusive = false;
+
qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL);
if (!qphy)
return -ENOMEM;
@@ -2524,17 +2549,17 @@ int qcom_qmp_phy_usb_create(struct device *dev, struct device_node *np, int id,
* For dual lane PHYs: tx2 -> 3, rx2 -> 4, pcs_misc (optional) -> 5
* For single lane PHYs: pcs_misc (optional) -> 3.
*/
- qphy->tx = of_iomap(np, 0);
- if (!qphy->tx)
- return -ENOMEM;
+ qphy->tx = devm_of_iomap(dev, np, 0, NULL);
+ if (IS_ERR(qphy->tx))
+ return PTR_ERR(qphy->tx);
- qphy->rx = of_iomap(np, 1);
- if (!qphy->rx)
- return -ENOMEM;
+ qphy->rx = devm_of_iomap(dev, np, 1, NULL);
+ if (IS_ERR(qphy->rx))
+ return PTR_ERR(qphy->rx);
- qphy->pcs = of_iomap(np, 2);
- if (!qphy->pcs)
- return -ENOMEM;
+ qphy->pcs = qmp_usb_iomap(dev, np, 2, exclusive);
+ if (IS_ERR(qphy->pcs))
+ return PTR_ERR(qphy->pcs);
/*
* If this is a dual-lane PHY, then there should be registers for the
@@ -2543,9 +2568,9 @@ int qcom_qmp_phy_usb_create(struct device *dev, struct device_node *np, int id,
* offset from the first lane.
*/
if (cfg->is_dual_lane_phy) {
- qphy->tx2 = of_iomap(np, 3);
- qphy->rx2 = of_iomap(np, 4);
- if (!qphy->tx2 || !qphy->rx2) {
+ qphy->tx2 = devm_of_iomap(dev, np, 3, NULL);
+ qphy->rx2 = devm_of_iomap(dev, np, 4, NULL);
+ if (IS_ERR(qphy->tx2) || IS_ERR(qphy->rx2)) {
dev_warn(dev,
"Underspecified device tree, falling back to legacy register regions\n");
@@ -2555,15 +2580,17 @@ int qcom_qmp_phy_usb_create(struct device *dev, struct device_node *np, int id,
qphy->rx2 = qphy->rx + QMP_PHY_LEGACY_LANE_STRIDE;
} else {
- qphy->pcs_misc = of_iomap(np, 5);
+ qphy->pcs_misc = devm_of_iomap(dev, np, 5, NULL);
}
} else {
- qphy->pcs_misc = of_iomap(np, 3);
+ qphy->pcs_misc = devm_of_iomap(dev, np, 3, NULL);
}
- if (!qphy->pcs_misc)
+ if (IS_ERR(qphy->pcs_misc)) {
dev_vdbg(dev, "PHY pcs_misc-reg not used\n");
+ qphy->pcs_misc = NULL;
+ }
qphy->pipe_clk = devm_get_clk_from_child(dev, np, NULL);
if (IS_ERR(qphy->pipe_clk)) {
