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| author | Jan Beulich <JBeulich@suse.com> | 2016-07-06 08:59:35 +0200 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2016-07-06 11:35:38 +0200 |
| commit | ee87d6d0d36d98c550f99274a81841033226e3bf (patch) | |
| tree | 8e74a364719986b2370c77bffd54362eee778230 /drivers/xen/xen-pciback | |
| parent | xen-pciback: use const and unsigned in bar_init() (diff) | |
| download | linux-ee87d6d0d36d98c550f99274a81841033226e3bf.tar.xz linux-ee87d6d0d36d98c550f99274a81841033226e3bf.zip | |
xen-pciback: short-circuit read path used for merging write values
There's no point calling xen_pcibk_config_read() here - all it'll do is
return whatever conf_space_read() returns for the field which was found
here (and which would be found there again). Also there's no point
clearing tmp_val before the call.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'drivers/xen/xen-pciback')
| -rw-r--r-- | drivers/xen/xen-pciback/conf_space.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/xen/xen-pciback/conf_space.c b/drivers/xen/xen-pciback/conf_space.c index 6a25533da237..6855bf552126 100644 --- a/drivers/xen/xen-pciback/conf_space.c +++ b/drivers/xen/xen-pciback/conf_space.c @@ -230,10 +230,8 @@ int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value) field_end = OFFSET(cfg_entry) + field->size; if (req_end > field_start && field_end > req_start) { - tmp_val = 0; - - err = xen_pcibk_config_read(dev, field_start, - field->size, &tmp_val); + err = conf_space_read(dev, cfg_entry, field_start, + &tmp_val); if (err) break; |