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James" Subject: [PATCH linux dev-4.10 v4 07/31] drivers: fsi: sbefifo: Use goto to reduce put statements Date: Thu, 5 Oct 2017 21:05:29 -0500 X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1507255553-13301-1-git-send-email-eajames@linux.vnet.ibm.com> References: <1507255553-13301-1-git-send-email-eajames@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17100602-0024-0000-0000-0000174C1026 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007847; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000235; SDB=6.00927057; UDB=6.00466442; IPR=6.00707311; BA=6.00005623; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017415; XFM=3.00000015; UTC=2017-10-06 02:06:15 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17100602-0025-0000-0000-00004CFDEA6E Message-Id: <1507255553-13301-8-git-send-email-eajames@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-10-06_01:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1710060029 X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.24 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Oct 2017 02:06:20 -0000 From: "Edward A. James" Use a goto in the read() and write() functions so that we can just have one get_client and put_client statement. Signed-off-by: Edward A. James Reviewed-by: Andrew Jeffery --- drivers/fsi/fsi-sbefifo.c | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/drivers/fsi/fsi-sbefifo.c b/drivers/fsi/fsi-sbefifo.c index 173cd03..a5bdc75 100644 --- a/drivers/fsi/fsi-sbefifo.c +++ b/drivers/fsi/fsi-sbefifo.c @@ -565,22 +565,21 @@ static ssize_t sbefifo_read_common(struct sbefifo_client *client, if (wait_event_interruptible(sbefifo->wait, sbefifo_read_ready(sbefifo, client, &n, &ret))) { - sbefifo_put_client(client); - return -ERESTARTSYS; + ret = -ERESTARTSYS; + goto out; } if (ret) { INIT_LIST_HEAD(&client->xfrs); - sbefifo_put_client(client); - return ret; + goto out; } n = min_t(size_t, n, len); if (ubuf) { if (copy_to_user(ubuf, READ_ONCE(client->rbuf.rpos), n)) { - sbefifo_put_client(client); - return -EFAULT; + ret = -EFAULT; + goto out; } } else { memcpy(kbuf, READ_ONCE(client->rbuf.rpos), n); @@ -592,8 +591,8 @@ static ssize_t sbefifo_read_common(struct sbefifo_client *client, if (!xfr) { /* should be impossible to not have an xfr here */ WARN_ONCE(1, "no xfr in queue"); - sbefifo_put_client(client); - return -EPROTO; + ret = -EPROTO; + goto out; } if (!test_bit(SBEFIFO_XFR_COMPLETE, &xfr->flags)) { @@ -610,9 +609,11 @@ static ssize_t sbefifo_read_common(struct sbefifo_client *client, } } - sbefifo_put_client(client); + ret = n; - return n; +out: + sbefifo_put_client(client); + return ret; } static ssize_t sbefifo_read(struct file *file, char __user *buf, size_t len, @@ -689,14 +690,14 @@ static ssize_t sbefifo_write_common(struct sbefifo_client *client, if (mod_timer(&sbefifo->poll_timer, jiffies)) sbefifo_put(sbefifo); - sbefifo_put_client(client); - return -ERESTARTSYS; + ret = -ERESTARTSYS; + goto out; } if (sbefifo->rc) { INIT_LIST_HEAD(&client->xfrs); - sbefifo_put_client(client); - return sbefifo->rc; + ret = sbefifo->rc; + goto out; } n = min_t(size_t, n, len); @@ -708,8 +709,8 @@ static ssize_t sbefifo_write_common(struct sbefifo_client *client, sbefifo_get(sbefifo); if (mod_timer(&sbefifo->poll_timer, jiffies)) sbefifo_put(sbefifo); - sbefifo_put_client(client); - return -EFAULT; + ret = -EFAULT; + goto out; } ubuf += n; @@ -736,8 +737,8 @@ static ssize_t sbefifo_write_common(struct sbefifo_client *client, sbefifo_put(sbefifo); } +out: sbefifo_put_client(client); - return ret; } -- 1.8.3.1