disable pwm7

hc

2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a

 kernel/drivers/misc/ocxl/config.c
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@@ -204,6 +204,18 @@
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 	return 0;
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 }
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+/**
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+ * get_dvsec_vendor0() - Find a related PCI device (function 0)
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+ * @dev: PCI device to match
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+ * @dev0: The PCI device (function 0) found
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+ * @out_pos: The position of PCI device (function 0)
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+ *
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+ * Returns 0 on success, negative on failure.
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+ *
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+ * NOTE: If it's successful, the reference of dev0 is increased,
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+ * so after using it, the callers must call pci_dev_put() to give
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+ * up the reference.
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+ */
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 static int get_dvsec_vendor0(struct pci_dev *dev, struct pci_dev **dev0,
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 			     int *out_pos)
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 {
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@@ -213,10 +225,14 @@
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 		dev = get_function_0(dev);
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 		if (!dev)
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 			return -1;
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+	} else {
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+		dev = pci_dev_get(dev);
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 	}
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 	pos = find_dvsec(dev, OCXL_DVSEC_VENDOR_ID);
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-	if (!pos)
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+	if (!pos) {
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+		pci_dev_put(dev);
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 		return -1;
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+	}
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 	*dev0 = dev;
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 	*out_pos = pos;
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 	return 0;
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@@ -233,6 +249,7 @@
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 	pci_read_config_dword(dev0, pos + OCXL_DVSEC_VENDOR_RESET_RELOAD,
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 			      &reset_reload);
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+	pci_dev_put(dev0);
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 	*val = !!(reset_reload & BIT(0));
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 	return 0;
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 }
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@@ -254,6 +271,7 @@
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 		reset_reload &= ~BIT(0);
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 	pci_write_config_dword(dev0, pos + OCXL_DVSEC_VENDOR_RESET_RELOAD,
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 			       reset_reload);
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+	pci_dev_put(dev0);
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 	return 0;
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 }
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