NFC: fdp: Detect errors from fdp_nci_create_conn()

commit fa1ce54ea38f7f83473fce62e64fefbd7ebd170e upstream.

drivers/nfc/fdp/fdp.c: In function ‘fdp_nci_patch_otp’:
drivers/nfc/fdp/fdp.c:373: warning: comparison is always false due to limited range of data type
drivers/nfc/fdp/fdp.c: In function ‘fdp_nci_patch_ram’:
drivers/nfc/fdp/fdp.c:444: warning: comparison is always false due to limited range of data type

fdp_nci_create_conn() may return a negative error code, which is
silently ignored by assigning it to a u8.

Change conn_id from u8 to int to fix this.

Fixes: a06347c04c13e380 ("NFC: Add Intel Fields Peak NFC solution driver")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/nfc/fdp/fdp.c b/drivers/nfc/fdp/fdp.c
index e44a7a2f4061a10a6838dded77c0ecc999abe82a..16427420b1a2aa2571a4a0d5607696ba227fee03 100644 (file)
--- a/drivers/nfc/fdp/fdp.c
+++ b/drivers/nfc/fdp/fdp.c
@@ -353,7 +353,7 @@ static int fdp_nci_patch_otp(struct nci_dev *ndev)
 {
        struct fdp_nci_info *info = nci_get_drvdata(ndev);
        struct device *dev = &info->phy->i2c_dev->dev;
-       u8 conn_id;
+       int conn_id;
        int r = 0;
 
        if (info->otp_version >= info->otp_patch_version)
@@ -424,7 +424,7 @@ static int fdp_nci_patch_ram(struct nci_dev *ndev)
 {
        struct fdp_nci_info *info = nci_get_drvdata(ndev);
        struct device *dev = &info->phy->i2c_dev->dev;
-       u8 conn_id;
+       int conn_id;
        int r = 0;
 
        if (info->ram_version >= info->ram_patch_version)