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Message-Id: <20240905-const_dfc_prepare-v4-2-4180e1d5a244@quicinc.com>
Date: Thu, 05 Sep 2024 08:36:10 +0800
From: Zijun Hu <zijun_hu@...oud.com>
To: Davidlohr Bueso <dave@...olabs.net>,
Jonathan Cameron <jonathan.cameron@...wei.com>,
Dave Jiang <dave.jiang@...el.com>,
Alison Schofield <alison.schofield@...el.com>,
Vishal Verma <vishal.l.verma@...el.com>, Ira Weiny <ira.weiny@...el.com>,
Dan Williams <dan.j.williams@...el.com>, Timur Tabi <timur@...nel.org>,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Zijun Hu <zijun_hu@...oud.com>, linux-cxl@...r.kernel.org,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
Zijun Hu <quic_zijuhu@...cinc.com>
Subject: [PATCH v4 2/2] net: qcom/emac: Find sgmii_ops by
device_for_each_child()
From: Zijun Hu <quic_zijuhu@...cinc.com>
To prepare for constifying the following old driver core API:
struct device *device_find_child(struct device *dev, void *data,
int (*match)(struct device *dev, void *data));
to new:
struct device *device_find_child(struct device *dev, const void *data,
int (*match)(struct device *dev, const void *data));
The new API does not allow its match function (*match)() to modify
caller's match data @*data, but emac_sgmii_acpi_match() as the old
API's match function indeed modifies relevant match data, so it is not
suitable for the new API any more, solved by using device_for_each_child()
to implement relevant finding sgmii_ops function.
By the way, this commit does not change any existing logic.
Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
---
drivers/net/ethernet/qualcomm/emac/emac-sgmii.c | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
index e4bc18009d08..29392c63d115 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
@@ -293,6 +293,11 @@ static struct sgmii_ops qdf2400_ops = {
};
#endif
+struct emac_match_data {
+ struct sgmii_ops **sgmii_ops;
+ struct device *target_device;
+};
+
static int emac_sgmii_acpi_match(struct device *dev, void *data)
{
#ifdef CONFIG_ACPI
@@ -303,7 +308,7 @@ static int emac_sgmii_acpi_match(struct device *dev, void *data)
{}
};
const struct acpi_device_id *id = acpi_match_device(match_table, dev);
- struct sgmii_ops **ops = data;
+ struct emac_match_data *match_data = data;
if (id) {
acpi_handle handle = ACPI_HANDLE(dev);
@@ -324,10 +329,12 @@ static int emac_sgmii_acpi_match(struct device *dev, void *data)
switch (hrv) {
case 1:
- *ops = &qdf2432_ops;
+ *match_data->sgmii_ops = &qdf2432_ops;
+ match_data->target_device = get_device(dev);
return 1;
case 2:
- *ops = &qdf2400_ops;
+ *match_data->sgmii_ops = &qdf2400_ops;
+ match_data->target_device = get_device(dev);
return 1;
}
}
@@ -356,10 +363,15 @@ int emac_sgmii_config(struct platform_device *pdev, struct emac_adapter *adpt)
int ret;
if (has_acpi_companion(&pdev->dev)) {
+ struct emac_match_data match_data = {
+ .sgmii_ops = &phy->sgmii_ops,
+ .target_device = NULL,
+ };
struct device *dev;
- dev = device_find_child(&pdev->dev, &phy->sgmii_ops,
- emac_sgmii_acpi_match);
+ device_for_each_child(&pdev->dev, &match_data, emac_sgmii_acpi_match);
+ /* Need to put_device(@dev) after use */
+ dev = match_data.target_device;
if (!dev) {
dev_warn(&pdev->dev, "cannot find internal phy node\n");
--
2.34.1
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