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>

Documentation/PCI/pci-error-recovery.txt

@@ -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: