linux-kernel - [PATCH v3 5/6] nvdimm: Increase max envelope size for IOCTL

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Date:	Sun, 13 Dec 2015 18:54:26 -0700
From:	Jerry Hoemann <jerry.hoemann@....com>
To:	ross.zwisler@...ux.intel.com, rjw@...ysocki.net, lenb@...nel.org,
	dan.j.williams@...el.com, elliott@....com, jmoyer@...hat.com,
	krivenok.dmitry@...il.com, linda.knippers@....com
Cc:	robert.moore@...el.com, lv.zheng@...el.com,
	rafael.j.wysocki@...el.com, linux-nvdimm@...ts.01.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jerry Hoemann <jerry.hoemann@....com>
Subject: [PATCH v3 5/6] nvdimm: Increase max envelope size for IOCTL

In __nd_ioctl must first read in the fixed sized portion of an ioctl
so that it can then determine the size of the variable part.

Prepare for ND_CMD_CALL_DSM calls which have larger fixed portion
wrapper.

Signed-off-by: Jerry Hoemann <jerry.hoemann@....com>
---
 include/linux/libnvdimm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index 3f021dc..b0a2f60 100644
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -27,7 +27,7 @@ enum {
 	/* need to set a limit somewhere, but yes, this is likely overkill */
 	ND_IOCTL_MAX_BUFLEN = SZ_4M,
 	ND_CMD_MAX_ELEM = 4,
-	ND_CMD_MAX_ENVELOPE = 16,
+	ND_CMD_MAX_ENVELOPE = 256,
 	ND_CMD_ARS_STATUS_MAX = SZ_4K,
 	ND_MAX_MAPPINGS = 32,
 
-- 
1.7.11.3

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