From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Subject: [PATCH] Input: cyapa - Remove superfluous type check in cyapa_gen5_read_idac_data() Date: Thu, 12 Feb 2015 15:16:13 +0100 Message-ID: <1423750573-30263-1-git-send-email-geert@linux-m68k.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Dmitry Torokhov , Dudley Du Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven List-Id: linux-input@vger.kernel.org drivers/input/mouse/cyapa_gen5.c: In function =E2=80=98cyapa_gen5_read_= idac_data=E2=80=99: drivers/input/mouse/cyapa_gen5.c:1876: warning: =E2=80=98max_element_cn= t=E2=80=99 may be used uninitialized in this function drivers/input/mouse/cyapa_gen5.c:1873: warning: =E2=80=98offset=E2=80=99= may be used uninitialized in this function If *data_size is non-zero, and idac_data_type contains an unknown type, max_element_cnt and offset will be uninitialized, and the loop will process non-existing data. However, this cannot happen (for now), as there's a test for unknown types at the top of cyapa_gen5_read_idac_data(). As no "if ... else if ..." is used in other places, remove the superfluous "if" to silence the compiler warning. Signed-off-by: Geert Uytterhoeven --- Alternatively, we can pre-initialize max_element_cnt and offset to zero= , and add "if (!max_element_cnt) goto out;" before the loop. drivers/input/mouse/cyapa_gen5.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cya= pa_gen5.c index ddf5393a118098fc..88c465b70e9d8776 100644 --- a/drivers/input/mouse/cyapa_gen5.c +++ b/drivers/input/mouse/cyapa_gen5.c @@ -1926,7 +1926,7 @@ static int cyapa_gen5_read_idac_data(struct cyapa= *cyapa, electrodes_tx =3D cyapa->electrodes_x; max_element_cnt =3D ((cyapa->aligned_electrodes_rx + 7) & ~7u) * electrodes_tx; - } else if (idac_data_type =3D=3D GEN5_RETRIEVE_SELF_CAP_PWC_DATA) { + } else { offset =3D 2; max_element_cnt =3D cyapa->electrodes_x + cyapa->electrodes_y; --=20 1.9.1