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From: Simon Wood <simon@mungewell.org>
To: linux-input@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Jiri Kosina <jkosina@suse.cz>,
	Simon Wood <simon@mungewell.org>
Subject: [PATCHv2] HID:hid-logitech: Prevent possibility of infinite loop when using /sys interface
Date: Thu, 14 Aug 2014 20:43:01 -0600
Message-ID: <1408070581-2460-1-git-send-email-simon@mungewell.org> (raw)
In-Reply-To: <alpine.LNX.2.00.1408121630000.15220@pobox.suse.cz>

If the device data is not accessible for some reason, returning 0 will cause the call to be
continuously called again as none of the string has been 'consumed'.

Signed-off-by: Simon Wood <simon@mungewell.org>
---
 drivers/hid/hid-lg4ff.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index cc2bd20..7835717 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -451,13 +451,13 @@ static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *at
 	drv_data = hid_get_drvdata(hid);
 	if (!drv_data) {
 		hid_err(hid, "Private driver data not found!\n");
-		return 0;
+		return -EINVAL;
 	}
 
 	entry = drv_data->device_props;
 	if (!entry) {
 		hid_err(hid, "Device properties not found!\n");
-		return 0;
+		return -EINVAL;
 	}
 
 	if (range == 0)
-- 
1.9.1


  reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-07  2:52 [PATCH] " Simon Wood
2014-08-12 14:30 ` Jiri Kosina
2014-08-15  2:43   ` Simon Wood [this message]
2014-08-15  8:56     ` [PATCHv2] " Jiri Kosina

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