linux-kernel - AW: [PATCH][next] SFH: fix error return check for -ERESTARTSYS

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Date:   Fri, 30 Oct 2020 14:40:16 +0000
From:   Walter Harms <wharms@....de>
To:     Colin King <colin.king@...onical.com>,
        Nehal Shah <nehal-bakulchandra.shah@....com>,
        Sandeep Singh <sandeep.singh@....com>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>
CC:     "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: AW: [PATCH][next] SFH: fix error return check for -ERESTARTSYS

nit picking:
i would  without "else" to improve readability:

       if (ret == -ERESTARTSYS)
                 return -ERESTARTSYS;

        if (ret < 0)
              return -ETIMEDOUT;

          return 0;

jm2c
 wh
________________________________________
Von: Colin King <colin.king@...onical.com>
Gesendet: Freitag, 30. Oktober 2020 15:30:02
An: Nehal Shah; Sandeep Singh; Jiri Kosina; Benjamin Tissoires; linux-input@...r.kernel.org
Cc: kernel-janitors@...r.kernel.org; linux-kernel@...r.kernel.org
Betreff: [PATCH][next] SFH: fix error return check for -ERESTARTSYS

From: Colin Ian King <colin.king@...onical.com>

Currently the check for the error return code -ERESTARTSYS is dead code
and never executed because a previous check for ret < 0 is catching this
and returning -ETIMEDOUT instead.  Fix this by checking for -ERESTARTSYS
before the more generic negative error code.

Addresses-Coverity: ("Logically dead code")
Fixes: 4b2c53d93a4b ("SFH:Transport Driver to add support of AMD Sensor Fusion Hub (SFH)")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/hid/amd-sfh-hid/amd_sfh_hid.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_hid.c b/drivers/hid/amd-sfh-hid/amd_sfh_hid.c
index a471079a3bd0..4f989483aa03 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_hid.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_hid.c
@@ -88,10 +88,10 @@ static int amdtp_wait_for_response(struct hid_device *hid)
                ret = wait_event_interruptible_timeout(hid_data->hid_wait,
                                                       cli_data->request_done[i],
                                                       msecs_to_jiffies(AMD_SFH_RESPONSE_TIMEOUT));
-       if (ret < 0)
-               return -ETIMEDOUT;
-       else if (ret == -ERESTARTSYS)
+       if (ret == -ERESTARTSYS)
                return -ERESTARTSYS;
+       else if (ret < 0)
+               return -ETIMEDOUT;
        else
                return 0;
 }
--
2.27.0