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pci-error-recovery: doc cleanup 

Include whitespace shooting; correction; typo fix; superfluous word
dropping.

Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Cao jin 2017-03-21 21:24:18 +08:00 committed by Jonathan Corbet
parent 3bdadc86dc
commit 97e4e959c9
1 changed files with 6 additions and 6 deletions
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12
Documentation/PCI/pci-error-recovery.txt
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@ -11,7 +11,7 @@
Many PCI bus controllers are able to detect a variety of hardware
PCI errors on the bus, such as parity errors on the data and address
busses, as well as SERR and PERR errors. Some of the more advanced
buses, as well as SERR and PERR errors. Some of the more advanced
chipsets are able to deal with these errors; these include PCI-E chipsets,
and the PCI-host bridges found on IBM Power4, Power5 and Power6-based
pSeries boxes. A typical action taken is to disconnect the affected device,
@ -173,7 +173,7 @@ is STEP 6 (Permanent Failure).
>>> a value of 0xff on read, and writes will be dropped. If more than
>>> EEH_MAX_FAILS I/O's are attempted to a frozen adapter, EEH
>>> assumes that the device driver has gone into an infinite loop
>>> and prints an error to syslog. A reboot is then required to
>>> and prints an error to syslog. A reboot is then required to
>>> get the device working again.
STEP 2: MMIO Enabled
@ -231,14 +231,14 @@ proceeds to STEP 4 (Slot Reset)
STEP 3: Link Reset
------------------
The platform resets the link. This is a PCI-Express specific step
and is done whenever a non-fatal error has been detected that can be
and is done whenever a fatal error has been detected that can be
"solved" by resetting the link.
STEP 4: Slot Reset
------------------
In response to a return value of PCI_ERS_RESULT_NEED_RESET, the
the platform will perform a slot reset on the requesting PCI device(s).
the platform will perform a slot reset on the requesting PCI device(s).
The actual steps taken by a platform to perform a slot reset
will be platform-dependent. Upon completion of slot reset, the
platform will call the device slot_reset() callback.
@ -258,7 +258,7 @@ configuration registers to initialize to their default conditions.
For most PCI devices, a soft reset will be sufficient for recovery.
Optional fundamental reset is provided to support a limited number
of PCI Express PCI devices for which a soft reset is not sufficient
of PCI Express devices for which a soft reset is not sufficient
for recovery.
If the platform supports PCI hotplug, then the reset might be
@ -303,7 +303,7 @@ driver performs device init only from PCI function 0:
Same as above.
Drivers for PCI Express cards that require a fundamental reset must
set the needs_freset bit in the pci_dev structure in their probe function.
set the needs_freset bit in the pci_dev structure in their probe function.
For example, the QLogic qla2xxx driver sets the needs_freset bit for certain
PCI card types: