Instead of disabling PCI communication between system resources in a host computing device and I/O devices when a PCI Host Bridge (PHB) is unable to function, the host computing device may include a redundant PCI communication path for maintaining communication between the system resources and the I/O devices after a first PHB experiences an unrecoverable error. In one embodiment, the redundant PCI communication path includes a second PHB that is maintained in a standby state so long as the first PHB is functioning normally. However, once the first PHB experiences an unrecoverable error, the second PHB is changed to the master state and assumes the responsibility for maintaining communication between the system resources and the I/O devices.

Claims

13 · 2 independent · depth 3

13 granted claims

›1.independentA computer program product comprising:na computer-readable storage medium having computer-readable program code embodied therewith, the computer-reada…+6

›2.↳ 1The computer program product of claim 1, wherein the second PHB facilitates PCI communication between the host and the I/O device while the first PHB …d2

›3.↳ 1The computer program product of claim 1, wherein synchronizing the first PHB to the second PHB further comprises computer code configure to:ntransfer …d2+1

›5.↳ 1The computer program product of claim 1, further comprising computer code configured to, before resetting the first PHB, isolate the first PHB from th…d2

›6.↳ 1The computer program product of claim 1, further comprising computer code configured to, after detecting the event, update routing information stored …d2

›7.↳ 1The computer program product of claim 1, wherein the second PHB is not used for transmitting data between the host and the I/O device while the first …d2

›8.independentA computing system, comprising:na computer processor;a first peripheral component interconnect host bridge (PHB) configured to facilitate peripheral c…+5

Classifications

4 codes

IPC · International Patent Classification

Section G — Physics

G06F13/40
G06F11/20
G06F11/00
G06F11/14

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Pendency

2.0 y

746 days filing → grant

Office actions

non-final + final

Responses

no RCE

Examiner

Joseph Kudirka

art unit 2114 · TC 2100

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Citations: 19 back · 0 forward

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20150019903 A1	15 Jan 2015

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