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authorsrinivas pandruvada <srinivas.pandruvada@intel.com>2012-05-10 16:45:31 -0700
committerJiri Kosina <jkosina@suse.cz>2012-05-14 14:57:26 +0200
commit0cd516c246759bb57b69d836b625d8f8c566e8ca (patch)
tree5d75d5d8edbe123cd98414143981d0a523527938 /drivers/hid
parentd6d7c873529abd622897cad5e36f1fd7d82f5110 (diff)
downloadop-kernel-dev-0cd516c246759bb57b69d836b625d8f8c566e8ca.zip
op-kernel-dev-0cd516c246759bb57b69d836b625d8f8c566e8ca.tar.gz
HID: handle logical min/max signedness properly in parser
When logical maximum is 0xffffffff, the parser fails even if logical minimum is more than 0. By HID specification this is a valid combination. Signed-off-by: srinivas pandruvada <srinivas.pandruvada@intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-core.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 0cddcaa..0bfbc48 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -230,9 +230,15 @@ static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsign
return -1;
}
- if (parser->global.logical_maximum < parser->global.logical_minimum) {
- hid_err(parser->device, "logical range invalid %d %d\n",
- parser->global.logical_minimum, parser->global.logical_maximum);
+ if ((parser->global.logical_minimum < 0 &&
+ parser->global.logical_maximum <
+ parser->global.logical_minimum) ||
+ (parser->global.logical_minimum >= 0 &&
+ (__u32)parser->global.logical_maximum <
+ (__u32)parser->global.logical_minimum)) {
+ dbg_hid("logical range invalid 0x%x 0x%x\n",
+ parser->global.logical_minimum,
+ parser->global.logical_maximum);
return -1;
}
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