Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753808AbaDOQ6l (ORCPT ); Tue, 15 Apr 2014 12:58:41 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:36368 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751229AbaDOQ6i (ORCPT ); Tue, 15 Apr 2014 12:58:38 -0400 From: Nishanth Menon To: Joel Fernandes , Herbert Xu , "David S. Miller" CC: , , , Joachim Eastwood , , Nishanth Menon Subject: [PATCH V2] crypto: omap-des - handle error of pm_runtime_get_sync Date: Tue, 15 Apr 2014 11:58:31 -0500 Message-ID: <1397581111-21148-1-git-send-email-nm@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <534D61DF.9090203@ti.com> References: <534D61DF.9090203@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org pm_runtime_get_sync may not always succeed depending on SoC involved. So handle the error appropriately ensuring usage_count is accurate in case of failure. Signed-off-by: Nishanth Menon --- V2: - review fixes, print function names in error log as well. V1: https://patchwork.kernel.org/patch/3993861/ drivers/crypto/omap-des.c | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c index ec5f131..1d570c4 100644 --- a/drivers/crypto/omap-des.c +++ b/drivers/crypto/omap-des.c @@ -223,12 +223,19 @@ static void omap_des_write_n(struct omap_des_dev *dd, u32 offset, static int omap_des_hw_init(struct omap_des_dev *dd) { + int err; + /* * clocks are enabled when request starts and disabled when finished. * It may be long delays between requests. * Device might go to off mode to save power. */ - pm_runtime_get_sync(dd->dev); + err = pm_runtime_get_sync(dd->dev); + if (err < 0) { + pm_runtime_put_noidle(dd->dev); + dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err); + return err; + } if (!(dd->flags & FLAGS_INIT)) { dd->flags |= FLAGS_INIT; @@ -1083,7 +1090,12 @@ static int omap_des_probe(struct platform_device *pdev) dd->phys_base = res->start; pm_runtime_enable(dev); - pm_runtime_get_sync(dev); + err = pm_runtime_get_sync(dev); + if (err < 0) { + pm_runtime_put_noidle(dev); + dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err); + goto err_get; + } omap_des_dma_stop(dd); @@ -1148,6 +1160,7 @@ err_algs: err_irq: tasklet_kill(&dd->done_task); tasklet_kill(&dd->queue_task); +err_get: pm_runtime_disable(dev); err_res: dd = NULL; @@ -1191,7 +1204,14 @@ static int omap_des_suspend(struct device *dev) static int omap_des_resume(struct device *dev) { - pm_runtime_get_sync(dev); + int err; + + err = pm_runtime_get_sync(dev); + if (err < 0) { + pm_runtime_put_noidle(dev); + dev_err(dev, "%s: failed to get_sync(%d)\n", __func__, err); + return err; + } return 0; } #endif -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/