Messages in this thread Patch in this message | | | Date | Wed, 06 Jul 2016 00:59:35 -0600 | From | "Jan Beulich" <> | Subject | [PATCH v4 6/7] 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> --- drivers/xen/xen-pciback/conf_space.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
--- 4.7-rc6-xen-pciback.orig/drivers/xen/xen-pciback/conf_space.c +++ 4.7-rc6-xen-pciback/drivers/xen/xen-pciback/conf_space.c @@ -230,10 +230,8 @@ int xen_pcibk_config_write(struct pci_de 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;
| |