xen-pciback: drop superfluous variables
req_start is simply an alias of the "offset" function parameter, and req_end is being used just once in each function. (And both variables were loop invariant anyway, so should at least have got initialized outside the loop.) Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
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@ -148,7 +148,7 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
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struct xen_pcibk_dev_data *dev_data = pci_get_drvdata(dev);
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const struct config_field_entry *cfg_entry;
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const struct config_field *field;
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int req_start, req_end, field_start, field_end;
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int field_start, field_end;
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/* if read fails for any reason, return 0
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* (as if device didn't respond) */
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u32 value = 0, tmp_val;
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@ -178,12 +178,10 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
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list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
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field = cfg_entry->field;
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req_start = offset;
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req_end = offset + size;
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field_start = OFFSET(cfg_entry);
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field_end = OFFSET(cfg_entry) + field->size;
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if (req_end > field_start && field_end > req_start) {
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if (offset + size > field_start && field_end > offset) {
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err = conf_space_read(dev, cfg_entry, field_start,
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&tmp_val);
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if (err)
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@ -191,7 +189,7 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
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value = merge_value(value, tmp_val,
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get_mask(field->size),
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field_start - req_start);
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field_start - offset);
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}
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}
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@ -211,7 +209,7 @@ int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value)
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const struct config_field_entry *cfg_entry;
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const struct config_field *field;
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u32 tmp_val;
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int req_start, req_end, field_start, field_end;
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int field_start, field_end;
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if (unlikely(verbose_request))
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printk(KERN_DEBUG
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@ -224,19 +222,17 @@ int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value)
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list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
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field = cfg_entry->field;
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req_start = offset;
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req_end = offset + size;
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field_start = OFFSET(cfg_entry);
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field_end = OFFSET(cfg_entry) + field->size;
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if (req_end > field_start && field_end > req_start) {
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if (offset + size > field_start && field_end > offset) {
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err = conf_space_read(dev, cfg_entry, field_start,
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&tmp_val);
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if (err)
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break;
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tmp_val = merge_value(tmp_val, value, get_mask(size),
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req_start - field_start);
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offset - field_start);
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err = conf_space_write(dev, cfg_entry, field_start,
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tmp_val);
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