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From: Ben Hutchings <ben@decadent.org.uk>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org,
	alan@lxorguk.ukuu.org.uk, Nishanth Menon <nm@ti.com>,
	Steve Sakoman <steve@sakoman.com>,
	Tony Lindgren <tony@atomide.com>, Kevin Hilman <khilman@ti.com>
Subject: [ 28/73] ARM: OMAP2+: OPP: Fix to ensure check of right oppdef after bad one
Date: Tue, 31 Jul 2012 05:43:38 +0100	[thread overview]
Message-ID: <20120731044315.770748839@decadent.org.uk> (raw)
In-Reply-To: <20120731044310.013763753@decadent.org.uk>

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nishanth Menon <nm@ti.com>

commit b110547e586eb5825bc1d04aa9147bff83b57672 upstream.

Commit 9fa2df6b90786301b175e264f5fa9846aba81a65
(ARM: OMAP2+: OPP: allow OPP enumeration to continue if device is not present)
makes the logic:
for (i = 0; i < opp_def_size; i++) {
	<snip>
	if (!oh || !oh->od) {
		<snip>
		continue;
	}
<snip>
opp_def++;
}

In short, the moment we hit a "Bad OPP", we end up looping the list
comparing against the bad opp definition pointer for the rest of the
iteration count. Instead, increment opp_def in the for loop itself
and allow continue to be used in code without much thought so that
we check the next set of OPP definition pointers :)

Cc: Steve Sakoman <steve@sakoman.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 arch/arm/mach-omap2/opp.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/opp.c b/arch/arm/mach-omap2/opp.c
index de6d464..d8f6dbf 100644
--- a/arch/arm/mach-omap2/opp.c
+++ b/arch/arm/mach-omap2/opp.c
@@ -53,7 +53,7 @@ int __init omap_init_opp_table(struct omap_opp_def *opp_def,
 	omap_table_init = 1;
 
 	/* Lets now register with OPP library */
-	for (i = 0; i < opp_def_size; i++) {
+	for (i = 0; i < opp_def_size; i++, opp_def++) {
 		struct omap_hwmod *oh;
 		struct device *dev;
 
@@ -86,7 +86,6 @@ int __init omap_init_opp_table(struct omap_opp_def *opp_def,
 					__func__, opp_def->freq,
 					opp_def->hwmod_name, i, r);
 		}
-		opp_def++;
 	}
 
 	return 0;



  parent reply	other threads:[~2012-07-31  4:51 UTC|newest]

Thread overview: 94+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-31  4:43 [ 00/73] 3.2.25-stable review Ben Hutchings
2012-07-31  4:43 ` [ 01/73] mm: reduce the amount of work done when updating min_free_kbytes Ben Hutchings
2012-07-31  4:43 ` [ 02/73] mm: compaction: allow compaction to isolate dirty pages Ben Hutchings
2012-07-31  4:43 ` [ 03/73] mm: compaction: determine if dirty pages can be migrated without blocking within ->migratepage Ben Hutchings
2012-07-31  4:43 ` [ 04/73] mm: page allocator: do not call direct reclaim for THP allocations while compaction is deferred Ben Hutchings
2012-07-31  4:43 ` [ 05/73] mm: compaction: make isolate_lru_page() filter-aware again Ben Hutchings
2012-07-31  4:43 ` [ 06/73] mm: compaction: introduce sync-light migration for use by compaction Ben Hutchings
2012-07-31 16:42   ` Herton Ronaldo Krzesinski
2012-07-31 17:00     ` Mel Gorman
2012-07-31 17:03       ` Mel Gorman
2012-07-31 23:12         ` Ben Hutchings
2012-07-31  4:43 ` [ 07/73] mm: vmscan: when reclaiming for compaction, ensure there are sufficient free pages available Ben Hutchings
2012-07-31  4:43 ` [ 08/73] mm: vmscan: do not OOM if aborting reclaim to start compaction Ben Hutchings
2012-07-31  4:43 ` [ 09/73] mm: vmscan: check if reclaim should really abort even if compaction_ready() is true for one zone Ben Hutchings
2012-07-31  4:43 ` [ 10/73] vmscan: promote shared file mapped pages Ben Hutchings
2012-07-31  4:43 ` [ 11/73] vmscan: activate executable pages after first usage Ben Hutchings
2012-07-31  4:43 ` [ 12/73] mm/vmscan.c: consider swap space when deciding whether to continue reclaim Ben Hutchings
2012-07-31  4:43 ` [ 13/73] mm: test PageSwapBacked in lumpy reclaim Ben Hutchings
2012-07-31  4:43 ` [ 14/73] mm: vmscan: convert global reclaim to per-memcg LRU lists Ben Hutchings
2012-07-31  4:43 ` [ 15/73] cpuset: mm: reduce large amounts of memory barrier related damage v3 Ben Hutchings
2012-07-31  4:43 ` [ 16/73] mm/hugetlb: fix warning in alloc_huge_page/dequeue_huge_page_vma Ben Hutchings
2012-07-31  4:43 ` [ 17/73] [SCSI] Fix NULL dereferences in scsi_cmd_to_driver Ben Hutchings
2012-07-31  4:43 ` [ 18/73] sched/nohz: Fix rq->cpu_load[] calculations Ben Hutchings
2012-07-31  4:43 ` [ 19/73] sched/nohz: Fix rq->cpu_load calculations some more Ben Hutchings
2012-07-31  4:43 ` [ 20/73] powerpc/ftrace: Fix assembly trampoline register usage Ben Hutchings
2012-07-31  4:43 ` [ 21/73] cx25821: Remove bad strcpy to read-only char* Ben Hutchings
2012-07-31  4:43 ` [ 22/73] x86: Fix boot on Twinhead H12Y Ben Hutchings
2012-07-31  4:43 ` [ 23/73] r8169: RxConfig hack for the 8168evl Ben Hutchings
2012-07-31  4:43 ` [ 24/73] cifs: when CONFIG_HIGHMEM is set, serialize the read/write kmaps Ben Hutchings
2012-07-31  4:43 ` [ 25/73] wireless: rt2x00: rt2800usb add more devices ids Ben Hutchings
2012-07-31  4:43 ` [ 26/73] wireless: rt2x00: rt2800usb more devices were identified Ben Hutchings
2012-07-31  4:43 ` [ 27/73] rt2800usb: 2001:3c17 is an RT3370 device Ben Hutchings
2012-07-31  4:43 ` Ben Hutchings [this message]
2012-08-01  1:56   ` [ 28/73] ARM: OMAP2+: OPP: Fix to ensure check of right oppdef after bad one Herton Ronaldo Krzesinski
2012-08-01  2:36     ` Ben Hutchings
2012-07-31  4:43 ` [ 29/73] usb: gadget: Fix g_ether interface link status Ben Hutchings
2012-07-31  4:43 ` [ 30/73] ext4: pass a char * to ext4_count_free() instead of a buffer_head ptr Ben Hutchings
2012-07-31  4:43 ` [ 31/73] ftrace: Disable function tracing during suspend/resume and hibernation, again Ben Hutchings
2012-07-31  4:43 ` [ 32/73] x86, microcode: microcode_core.c simple_strtoul cleanup Ben Hutchings
2012-07-31  4:43 ` [ 33/73] x86, microcode: Sanitize per-cpu microcode reloading interface Ben Hutchings
2012-08-03  9:04   ` Sven Joachim
2012-08-03  9:43     ` Borislav Petkov
2012-08-03 12:27       ` Borislav Petkov
2012-08-04 15:41         ` Ben Hutchings
2012-08-04 16:07           ` Henrique de Moraes Holschuh
2012-08-04 17:23             ` Ben Hutchings
2012-08-05  9:21               ` Borislav Petkov
2012-08-05 18:56                 ` Ben Hutchings
2012-07-31  4:43 ` [ 34/73] usbdevfs: Correct amount of data copied to user in processcompl_compat Ben Hutchings
2012-07-31  4:43 ` [ 35/73] ASoC: dapm: Fix locking during codec shutdown Ben Hutchings
2012-07-31 16:11   ` Herton Ronaldo Krzesinski
2012-07-31 16:13     ` Mark Brown
2012-07-31 23:20       ` Ben Hutchings
2012-07-31  4:43 ` [ 36/73] ext4: fix overhead calculation used by ext4_statfs() Ben Hutchings
2012-07-31  4:43 ` [ 37/73] udf: Improve table length check to avoid possible overflow Ben Hutchings
2012-07-31  4:43 ` [ 38/73] powerpc: Add "memory" attribute for mfmsr() Ben Hutchings
2012-07-31  4:43 ` [ 39/73] mwifiex: correction in mcs index check Ben Hutchings
2012-07-31  4:43 ` [ 40/73] USB: option: Ignore ZTE (Vodafone) K3570/71 net interfaces Ben Hutchings
2012-07-31  4:43 ` [ 41/73] USB: option: add ZTE MF821D Ben Hutchings
2012-07-31  4:43 ` [ 42/73] target: Add generation of LOGICAL BLOCK ADDRESS OUT OF RANGE Ben Hutchings
2012-07-31  4:43 ` [ 43/73] target: Add range checking to UNMAP emulation Ben Hutchings
2012-07-31  4:43 ` [ 44/73] target: Fix reading of data length fields for UNMAP commands Ben Hutchings
2012-07-31  4:43 ` [ 45/73] target: Fix possible integer underflow in UNMAP emulation Ben Hutchings
2012-07-31  4:43 ` [ 46/73] target: Check number of unmap descriptors against our limit Ben Hutchings
2012-07-31  4:43 ` [ 47/73] s390/idle: fix sequence handling vs cpu hotplug Ben Hutchings
2012-07-31  4:43 ` [ 48/73] rtlwifi: rtl8192de: Fix phy-based version calculation Ben Hutchings
2012-07-31  4:43 ` [ 49/73] workqueue: perform cpu down operations from low priority cpu_notifier() Ben Hutchings
2012-07-31  4:44 ` [ 50/73] ALSA: hda - Add support for Realtek ALC282 Ben Hutchings
2012-07-31  4:44 ` [ 51/73] iommu/amd: Fix hotplug with iommu=pt Ben Hutchings
2012-07-31  4:44 ` [ 52/73] drm/radeon: Try harder to avoid HW cursor ending on a multiple of 128 columns Ben Hutchings
2012-07-31  4:44 ` [ 53/73] ALSA: hda - Turn on PIN_OUT from hdmi playback prepare Ben Hutchings
2012-07-31  4:44 ` [ 54/73] block: add blk_queue_dead() Ben Hutchings
2012-07-31  4:44 ` [ 55/73] [SCSI] Fix device removal NULL pointer dereference Ben Hutchings
2012-07-31  4:44 ` [ 56/73] [SCSI] Avoid dangling pointer in scsi_requeue_command() Ben Hutchings
2012-07-31  4:44 ` [ 57/73] [SCSI] fix hot unplug vs async scan race Ben Hutchings
2012-07-31  4:44 ` [ 58/73] [SCSI] fix eh wakeup (scsi_schedule_eh vs scsi_restart_operations) Ben Hutchings
2012-07-31  4:44 ` [ 59/73] [SCSI] libsas: continue revalidation Ben Hutchings
2012-07-31  4:44 ` [ 60/73] [SCSI] libsas: fix sas_discover_devices return code handling Ben Hutchings
2012-07-31  4:44 ` [ 61/73] iscsi-target: Drop bogus struct file usage for iSCSI/SCTP Ben Hutchings
2012-07-31  4:44 ` [ 62/73] mmc: sdhci-pci: CaFe has broken card detection Ben Hutchings
2012-07-31  4:44 ` [ 63/73] ext4: dont let i_reserved_meta_blocks go negative Ben Hutchings
2012-07-31  4:44 ` [ 64/73] ext4: undo ext4_calc_metadata_amount if we fail to claim space Ben Hutchings
2012-07-31  4:44 ` [ 65/73] ASoC: dapm: Fix _PRE and _POST events for DAPM performance improvements Ben Hutchings
2012-07-31  4:44 ` [ 66/73] locks: fix checking of fcntl_setlease argument Ben Hutchings
2012-07-31  4:44 ` [ 67/73] ACPI/AC: prevent OOPS on some boxes due to missing check power_supply_register() return value check Ben Hutchings
2012-07-31  4:44 ` [ 68/73] drm/radeon: fix bo creation retry path Ben Hutchings
2012-07-31  4:44 ` [ 69/73] drm/radeon: fix non revealent error message Ben Hutchings
2012-07-31  4:44 ` [ 70/73] drm/radeon: fix hotplug of DP to DVI|HDMI passive adapters (v2) Ben Hutchings
2012-07-31  4:44 ` [ 71/73] drm/radeon: on hotplug force link training to happen (v2) Ben Hutchings
2012-07-31  4:44 ` [ 72/73] Btrfs: call the ordered free operation without any locks held Ben Hutchings
2012-07-31  4:44 ` [ 73/73] nouveau: Fix alignment requirements on src and dst addresses Ben Hutchings
2012-07-31  5:00 ` [ 00/73] 3.2.25-stable review Ben Hutchings
2012-08-01 12:55 ` Steven Rostedt
2012-08-05 22:26   ` Ben Hutchings

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