| Message ID | 1467283993-3185-2-git-send-email-xyjxie@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Thu, Jun 30, 2016 at 06:53:07PM +0800, Yongji Xie wrote: >PCI resources allocator will use firmware setup and not try to >reassign resource when PCI_PROBE_ONLY or IORESOURCE_PCI_FIXED >is set. > >The enforced alignment in pci_reassigndev_resource_alignment() >should be ignored in this case. Otherwise, some PCI devices' >resources would be released here and not re-allocated. > >Signed-off-by: Yongji Xie <xyjxie@linux.vnet.ibm.com> >--- > drivers/pci/pci.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > >diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c >index c8b4dbd..be8f72c 100644 >--- a/drivers/pci/pci.c >+++ b/drivers/pci/pci.c >@@ -4760,6 +4760,13 @@ static resource_size_t pci_specified_resource_alignment(struct pci_dev *dev) > > spin_lock(&resource_alignment_lock); > p = resource_alignment_param; >+ if (pci_has_flag(PCI_PROBE_ONLY)) { >+ if (*p) >+ printk_once(KERN_INFO "PCI: Ignore resource_alignment parameter: %s with PCI_PROBE_ONLY set\n", >+ p); We don't have to print @resource_alignment as it's ignored completely. The content included in it doesn't mean anything: pr_info_once("PCI: resource_alignment ignored with PCI_PROBE_ONLY\n"); >+ spin_unlock(&resource_alignment_lock); >+ return 0; >+ } A empty line is needed here. > while (*p) { > count = 0; > if (sscanf(p, "%d%n", &align_order, &count) == 1 && >@@ -4837,6 +4844,11 @@ void pci_reassigndev_resource_alignment(struct pci_dev *dev) > r = &dev->resource[i]; > if (!(r->flags & IORESOURCE_MEM)) > continue; >+ if (r->flags & IORESOURCE_PCI_FIXED) { >+ dev_info(&dev->dev, "No alignment for fixed BAR%d: %pR\n", >+ i, r); The message would be like below to match PCI code style. I'm thinking it probably uses dev_dbg() instead dev_info(), but not sure for 100%. dev_info(&dev->dev, "BAR %d: fixed %pR, no alignment\n", i, r); >+ continue; >+ } A empty line is needed here. > size = resource_size(r); > if (size < align) { > size = align; Thanks, Gavin -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Gavin, On 2016/7/1 8:28, Gavin Shan wrote: > On Thu, Jun 30, 2016 at 06:53:07PM +0800, Yongji Xie wrote: >> PCI resources allocator will use firmware setup and not try to >> reassign resource when PCI_PROBE_ONLY or IORESOURCE_PCI_FIXED >> is set. >> >> The enforced alignment in pci_reassigndev_resource_alignment() >> should be ignored in this case. Otherwise, some PCI devices' >> resources would be released here and not re-allocated. >> >> Signed-off-by: Yongji Xie <xyjxie@linux.vnet.ibm.com> >> --- >> drivers/pci/pci.c | 12 ++++++++++++ >> 1 file changed, 12 insertions(+) >> >> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c >> index c8b4dbd..be8f72c 100644 >> --- a/drivers/pci/pci.c >> +++ b/drivers/pci/pci.c >> @@ -4760,6 +4760,13 @@ static resource_size_t pci_specified_resource_alignment(struct pci_dev *dev) >> >> spin_lock(&resource_alignment_lock); >> p = resource_alignment_param; >> + if (pci_has_flag(PCI_PROBE_ONLY)) { >> + if (*p) >> + printk_once(KERN_INFO "PCI: Ignore resource_alignment parameter: %s with PCI_PROBE_ONLY set\n", >> + p); > We don't have to print @resource_alignment as it's ignored completely. > The content included in it doesn't mean anything: > > pr_info_once("PCI: resource_alignment ignored with PCI_PROBE_ONLY\n"); OK. It looks simpler now. >> + spin_unlock(&resource_alignment_lock); >> + return 0; >> + } > A empty line is needed here. > >> while (*p) { >> count = 0; >> if (sscanf(p, "%d%n", &align_order, &count) == 1 && >> @@ -4837,6 +4844,11 @@ void pci_reassigndev_resource_alignment(struct pci_dev *dev) >> r = &dev->resource[i]; >> if (!(r->flags & IORESOURCE_MEM)) >> continue; >> + if (r->flags & IORESOURCE_PCI_FIXED) { >> + dev_info(&dev->dev, "No alignment for fixed BAR%d: %pR\n", >> + i, r); > The message would be like below to match PCI code style. I'm thinking it probably > uses dev_dbg() instead dev_info(), but not sure for 100%. > > dev_info(&dev->dev, "BAR %d: fixed %pR, no alignment\n", i, r); Maybe dev_info() is OK.:-) >> + continue; >> + } > A empty line is needed here. > >> size = resource_size(r); >> if (size < align) { >> size = align; > Thanks, > Gavin > > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@lists.ozlabs.org > https://lists.ozlabs.org/listinfo/linuxppc-dev -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index c8b4dbd..be8f72c 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4760,6 +4760,13 @@ static resource_size_t pci_specified_resource_alignment(struct pci_dev *dev) spin_lock(&resource_alignment_lock); p = resource_alignment_param; + if (pci_has_flag(PCI_PROBE_ONLY)) { + if (*p) + printk_once(KERN_INFO "PCI: Ignore resource_alignment parameter: %s with PCI_PROBE_ONLY set\n", + p); + spin_unlock(&resource_alignment_lock); + return 0; + } while (*p) { count = 0; if (sscanf(p, "%d%n", &align_order, &count) == 1 && @@ -4837,6 +4844,11 @@ void pci_reassigndev_resource_alignment(struct pci_dev *dev) r = &dev->resource[i]; if (!(r->flags & IORESOURCE_MEM)) continue; + if (r->flags & IORESOURCE_PCI_FIXED) { + dev_info(&dev->dev, "No alignment for fixed BAR%d: %pR\n", + i, r); + continue; + } size = resource_size(r); if (size < align) { size = align;
PCI resources allocator will use firmware setup and not try to reassign resource when PCI_PROBE_ONLY or IORESOURCE_PCI_FIXED is set. The enforced alignment in pci_reassigndev_resource_alignment() should be ignored in this case. Otherwise, some PCI devices' resources would be released here and not re-allocated. Signed-off-by: Yongji Xie <xyjxie@linux.vnet.ibm.com> --- drivers/pci/pci.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)