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1 From: "Bounine, Alexandre" <Alexandre.Bounine@idt.com>
2 Subject: RE: [PATCH v2 5/7] powerpc/85xx: Add MChk handler for SRIO port
3 Date: Thu, 5 Aug 2010 11:17:58 -0700
4 Lines: 18
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11 Cc: "Michael Neuling" <mikey@neuling.org>,
12         "Timur Tabi" <timur@freescale.com>,
13         "Alexandre Bounine" <abounine@tundra.com>,
14         <linuxppc-dev@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>,
15         <thomas.moll@sysgo.com>, "Li Yang-R58472" <r58472@freescale.com>
16 To: "Kumar Gala" <galak@kernel.crashing.org>
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47 Thread-Topic: [PATCH v2 5/7] powerpc/85xx: Add MChk handler for SRIO port
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55
56 > I'm looking at this now and wondering what we added the mcheck handler
57 for in the first place and what
58 > its trying to accomplish.
59
60 > - k
61
62 This protects system from hanging if RIO link fails or enters error
63 state. In some situations following maintenance read may initiate link
64 recovery from error state.
65
66 As it is now, MCheck mostly prevents system from hanging, but it also
67 adds sense to return status of maintenance read routine. I am using
68 return status in my new set of patches to check if RIO link is valid
69 during error recovery.
70
71 Alex.
72
73  
74
75