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power: supply: cpcap-battery: fix invalid usage of list cursor

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[ Upstream commit d0a43c12ee ]

Fix invalid usage of a list_for_each_entry in cpcap_battery_irq_thread().
Empty list or fully traversed list points to list head, which is not
NULL (and before the first element containing real data).

Signed-off-by: Guangqing Zhu <zhuguangqing83@gmail.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Carl Philipp Klemm <philipp@uvos.xyz>
Tested-by: Carl Philipp Klemm <philipp@uvos.xyz>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Guangqing Zhu 2021-04-21 22:36:50 +08:00 • committed by Greg Kroah-Hartman
commit 443467bd62
1 changed files with 1 additions and 1 deletions
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drivers/power/supply/cpcap-battery.c
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@ -626,7 +626,7 @@ static irqreturn_t cpcap_battery_irq_thread(int irq, void *data)
break;
}
if (!d)
if (list_entry_is_head(d, &ddata->irq_list, node))
return IRQ_NONE;
latest = cpcap_battery_latest(ddata);