During probing, the driver tries to get a list (mask) of supported
command types in port100_get_command_type_mask() function. The value
is u64 and 0 is treated as invalid mask (no commands supported). The
function however returns also -ERRNO as u64 which will be interpret as
valid command mask.
Return 0 on every error case of port100_get_command_type_mask(), so the
probing will stop.
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 0347a6ab300a ("NFC: port100: Commands mechanism implementation")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
---
drivers/nfc/port100.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/nfc/port100.c b/drivers/nfc/port100.c
index 1296148b4566..ec1630bfedf4 100644
--- a/drivers/nfc/port100.c
+++ b/drivers/nfc/port100.c
@@ -1109,15 +1109,11 @@ static u64 port100_get_command_type_mask(struct port100 *dev)
skb = port100_alloc_skb(dev, 0);
if (!skb)
- return -ENOMEM;
+ return 0;
- nfc_err(&dev->interface->dev, "%s:%d\n", __func__, __LINE__);
resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
- if (IS_ERR(resp)) {
- nfc_err(&dev->interface->dev, "%s:%d\n", __func__, __LINE__);
- return PTR_ERR(resp);
- }
- nfc_err(&dev->interface->dev, "%s:%d\n", __func__, __LINE__);
+ if (IS_ERR(resp))
+ return 0;
if (resp->len < 8)
mask = 0;
--
2.30.2
