linux-kernel - [PATCH 1/2] block: partitions: mac: obey the state->limit constraint

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Message-Id: <1361424101-24936-1-git-send-email-ming.lei@canonical.com>
Date:	Thu, 21 Feb 2013 13:21:40 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Cc:	Jens Axboe <axboe@...nel.dk>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Ming Lei <ming.lei@...onical.com>
Subject: [PATCH 1/2] block: partitions: mac: obey the state->limit constraint

It isn't necessary to read the information of partitions whose No.
is equal and more than state->limit since only maximum state->limit
partitions will be added inside rescan_partitions().

That is also what other kind of partitions are doing.

Signed-off-by: Ming Lei <ming.lei@...onical.com>
---
 block/partitions/mac.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/block/partitions/mac.c b/block/partitions/mac.c
index 11f688b..76d8ba6 100644
--- a/block/partitions/mac.c
+++ b/block/partitions/mac.c
@@ -63,6 +63,10 @@ int mac_partition(struct parsed_partitions *state)
 		put_dev_sector(sect);
 		return 0;
 	}
+
+	if (blocks_in_map >= state->limit)
+		blocks_in_map = state->limit - 1;
+
 	strlcat(state->pp_buf, " [mac]", PAGE_SIZE);
 	for (slot = 1; slot <= blocks_in_map; ++slot) {
 		int pos = slot * secsize;
-- 
1.7.9.5

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