amba: Use driver_set_override() instead of open-coding
Use a helper to set driver_override to reduce the amount of duplicated code. Make the driver_override field const char, because it is not modified by the core and it matches other subsystems. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220419113435.246203-3-krzysztof.kozlowski@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -94,31 +94,11 @@ static ssize_t driver_override_store(struct device *_dev,
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const char *buf, size_t count)
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const char *buf, size_t count)
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{
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{
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struct amba_device *dev = to_amba_device(_dev);
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struct amba_device *dev = to_amba_device(_dev);
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char *driver_override, *old, *cp;
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int ret;
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/* We need to keep extra room for a newline */
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ret = driver_set_override(_dev, &dev->driver_override, buf, count);
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if (count >= (PAGE_SIZE - 1))
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if (ret)
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return -EINVAL;
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return ret;
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driver_override = kstrndup(buf, count, GFP_KERNEL);
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if (!driver_override)
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return -ENOMEM;
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cp = strchr(driver_override, '\n');
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if (cp)
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*cp = '\0';
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device_lock(_dev);
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old = dev->driver_override;
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if (strlen(driver_override)) {
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dev->driver_override = driver_override;
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} else {
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kfree(driver_override);
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dev->driver_override = NULL;
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}
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device_unlock(_dev);
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kfree(old);
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return count;
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return count;
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}
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}
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@ -70,7 +70,11 @@ struct amba_device {
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unsigned int cid;
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unsigned int cid;
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struct amba_cs_uci_id uci;
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struct amba_cs_uci_id uci;
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unsigned int irq[AMBA_NR_IRQS];
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unsigned int irq[AMBA_NR_IRQS];
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char *driver_override;
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/*
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* Driver name to force a match. Do not set directly, because core
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* frees it. Use driver_set_override() to set or clear it.
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*/
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const char *driver_override;
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};
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};
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struct amba_driver {
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struct amba_driver {
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