linux-kernel - [PATCH] lightnvm: Add error code for bad write pointer

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Message-Id: <1504693358-12702-1-git-send-email-javier@cnexlabs.com>
Date:   Wed,  6 Sep 2017 12:22:38 +0200
From:   "Javier González" <jg@...htnvm.io>
To:     mb@...htnvm.io, axboe@...com
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Javier González <javier@...xlabs.com>
Subject: [PATCH] lightnvm: Add error code for bad write pointer

Add new error code introduced on the OCSSD spec 2.0 for write pointer
mismatch on the device side. This indicates to the host that a write on
a block (chunk) is not respecting the required sequentiality.

Signed-off-by: Javier González <javier@...xlabs.com>
---
 include/linux/lightnvm.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 7dfa56ebbc6d..81b71c6d5873 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -102,7 +102,8 @@ enum {
 	/* Status codes */
 	NVM_RSP_SUCCESS		= 0x0,
 	NVM_RSP_NOT_CHANGEABLE	= 0x1,
-	NVM_RSP_ERR_FAILWRITE	= 0x40ff,
+	NVM_RSP_ERR_FAILWRITE	= 0x40ff,	/* Generic write failure */
+	NVM_RSP_ERR_FAILWP	= 0x42f0,	/* Write pointer failure */
 	NVM_RSP_ERR_EMPTYPAGE	= 0x42ff,
 	NVM_RSP_ERR_FAILECC	= 0x4281,
 	NVM_RSP_ERR_FAILCRC	= 0x4004,
-- 
2.7.4