linux-kernel - [PATCH] lightnvm: change max_phys

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Message-Id: <1447353300-26027-1-git-send-email-m@bjorling.me>
Date:	Thu, 12 Nov 2015 19:35:00 +0100
From:	Matias Bjørling <m@...rling.me>
To:	linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	axboe@...com, geert@...ux-m68k.org,
	Matias Bjørling <m@...rling.me>
Subject: [PATCH] lightnvm: change max_phys_sect to ushort

The max_phys_sect variable is defined as a char. We do a boundary check
to maximally allow 256 physical page descriptors per command. As we are
not indexing from zero. This expression is always in false. Bump the
max_phys_sect to an unsigned short to support the range check.

Signed-off-by: Matias Bjørling <m@...rling.me>
Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
 include/linux/lightnvm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 69c9057..4b1cd3d 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -220,7 +220,7 @@ struct nvm_dev_ops {
 	nvm_dev_dma_alloc_fn	*dev_dma_alloc;
 	nvm_dev_dma_free_fn	*dev_dma_free;
 
-	uint8_t			max_phys_sect;
+	unsigned int max_phys_sect;
 };
 
 struct nvm_lun {
-- 
2.1.4

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