From patchwork Tue Aug 14 14:19:05 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shubhrajyoti Datta X-Patchwork-Id: 1320521 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 897EBDF215 for ; Tue, 14 Aug 2012 14:33:41 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1T1I6k-0008Q4-DG; Tue, 14 Aug 2012 14:28:35 +0000 Received: from devils.ext.ti.com ([198.47.26.153]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1T1HyY-0003Hw-4l for linux-arm-kernel@lists.infradead.org; Tue, 14 Aug 2012 14:20:11 +0000 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id q7EEJQ6Y023850; Tue, 14 Aug 2012 09:19:27 -0500 Received: from DBDE71.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id q7EEJQrX026441; Tue, 14 Aug 2012 19:49:26 +0530 (IST) Received: from dbdp33.itg.ti.com (172.24.170.252) by DBDE71.ent.ti.com (172.24.170.149) with Microsoft SMTP Server id 14.1.323.3; Tue, 14 Aug 2012 19:49:25 +0530 Received: from ula0393217.india.ti.com (smtpvbd.itg.ti.com [172.24.170.250]) by dbdp33.itg.ti.com (8.13.8/8.13.8) with ESMTP id q7EEJGmT011366; Tue, 14 Aug 2012 19:49:25 +0530 From: Shubhrajyoti D To: Subject: [PATCHv6 23/24] i2c: omap: sanitize exit path Date: Tue, 14 Aug 2012 19:49:05 +0530 Message-ID: <1344953946-13005-24-git-send-email-shubhrajyoti@ti.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1344953946-13005-1-git-send-email-shubhrajyoti@ti.com> References: <1344953946-13005-1-git-send-email-shubhrajyoti@ti.com> MIME-Version: 1.0 X-Spam-Note: CRM114 invocation failed X-Spam-Score: -6.9 (------) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-6.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [198.47.26.153 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: tony@atomide.com, w.sang@pengutronix.de, Felipe Balbi , linux-i2c@vger.kernel.org, ben-linux@fluff.org, Shubhrajyoti D , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Felipe Balbi move the goto out label one line down, so that it can be used when stat is read as zero. All other exits, can be done with a break statement. While at that, also break out as soon as we complete draining IRQ, since at that time we know we transferred everything there was to be transferred. Signed-off-by: Felipe Balbi Signed-off-by: Shubhrajyoti D --- drivers/i2c/busses/i2c-omap.c | 26 +++++++++++++------------- 1 files changed, 13 insertions(+), 13 deletions(-) diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index d81189a..3df6f92 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -901,27 +901,26 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) if (!stat) { /* my work here is done */ - spin_unlock_irqrestore(&dev->lock, flags); - return IRQ_HANDLED; + goto out; } dev_dbg(dev->dev, "IRQ (ISR = 0x%04x)\n", stat); if (count++ == 100) { dev_warn(dev->dev, "Too much work in one IRQ\n"); - goto out; + break; } if (stat & OMAP_I2C_STAT_NACK) { err |= OMAP_I2C_STAT_NACK; omap_i2c_ack_stat(dev, OMAP_I2C_STAT_NACK); - goto out; + break; } if (stat & OMAP_I2C_STAT_AL) { dev_err(dev->dev, "Arbitration lost\n"); err |= OMAP_I2C_STAT_AL; omap_i2c_ack_stat(dev, OMAP_I2C_STAT_AL); - goto out; + break; } /* @@ -934,7 +933,7 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) OMAP_I2C_STAT_XRDY | OMAP_I2C_STAT_XDR | OMAP_I2C_STAT_ARDY)); - goto out; + break; } if (stat & OMAP_I2C_STAT_RDR) { @@ -949,7 +948,7 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) i2c_omap_errata_i207(dev, stat); omap_i2c_ack_stat(dev, OMAP_I2C_STAT_RDR); - continue; + break; } if (stat & OMAP_I2C_STAT_RRDY) { @@ -972,10 +971,10 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) ret = omap_i2c_transmit_data(dev, num_bytes, true); if (ret < 0) - goto out; + break; omap_i2c_ack_stat(dev, OMAP_I2C_STAT_XDR); - continue; + break; } if (stat & OMAP_I2C_STAT_XRDY) { @@ -987,7 +986,7 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) ret = omap_i2c_transmit_data(dev, num_bytes, false); if (ret < 0) - goto out; + break; omap_i2c_ack_stat(dev, OMAP_I2C_STAT_XRDY); continue; @@ -997,19 +996,20 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) dev_err(dev->dev, "Receive overrun\n"); err |= OMAP_I2C_STAT_ROVR; omap_i2c_ack_stat(dev, OMAP_I2C_STAT_ROVR); - goto out; + break; } if (stat & OMAP_I2C_STAT_XUDF) { dev_err(dev->dev, "Transmit underflow\n"); err |= OMAP_I2C_STAT_XUDF; omap_i2c_ack_stat(dev, OMAP_I2C_STAT_XUDF); - goto out; + break; } } while (stat); -out: omap_i2c_complete_cmd(dev, err); + +out: spin_unlock_irqrestore(&dev->lock, flags); return IRQ_HANDLED;