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[2.34.24.178]) by smtp.gmail.com with ESMTPSA id v7-20020ac87487000000b0041950c7f6d8sm4430101qtq.60.2023.11.22.06.33.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Nov 2023 06:33:07 -0800 (PST) From: Marco Pagani To: Moritz Fischer , Wu Hao , Xu Yilun , Tom Rix , Greg Kroah-Hartman Cc: Marco Pagani , linux-kernel@vger.kernel.org, linux-fpga@vger.kernel.org Subject: [RFC PATCH 1/2] fpga: add a module owner field to fpga_manager and fpga_manager_ops Date: Wed, 22 Nov 2023 15:32:51 +0100 Message-ID: <20231122143252.181680-2-marpagan@redhat.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231122143252.181680-1-marpagan@redhat.com> References: <20231122143252.181680-1-marpagan@redhat.com> MIME-Version: 1.0 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Wed, 22 Nov 2023 06:33:18 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1783275040856749809 X-GMAIL-MSGID: 1783275040856749809 Add a module *owner field to the fpga_manager_ops and fpga_manager structs to protect the fpga manager against the unloading of the low-level control module while someone is holding a reference to the manager device. Low-level control modules should statically set the owner field of the fpga_manager_ops struct to THIS_MODULE. Then, when the manager is registered using fpga_mgr_register(), the value is copied into the owner field of the fpga_manager struct (that contains the device context). In this way, the manager can later use it in fpga_mgr_get() to take the low-level module's refcount. To prevent races while unloading the low-level control module, the fpga_mgr_get() and fpga_mgr_put() methods are protected with a mutex. Other changes: moved put_device() form __fpga_mgr_get() to fpga_mgr_get() and of_fpga_mgr_get() to improve code clarity. Fixes: 654ba4cc0f3e ("fpga manager: ensure lifetime with of_fpga_mgr_get") Signed-off-by: Marco Pagani --- drivers/fpga/fpga-mgr.c | 56 +++++++++++++++++++++++++---------- include/linux/fpga/fpga-mgr.h | 4 +++ 2 files changed, 44 insertions(+), 16 deletions(-) diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c index 06651389c592..f76be7e2f722 100644 --- a/drivers/fpga/fpga-mgr.c +++ b/drivers/fpga/fpga-mgr.c @@ -21,6 +21,8 @@ static DEFINE_IDA(fpga_mgr_ida); static const struct class fpga_mgr_class; +static DEFINE_MUTEX(mgr_lock); + struct fpga_mgr_devres { struct fpga_manager *mgr; }; @@ -667,17 +669,15 @@ ATTRIBUTE_GROUPS(fpga_mgr); static struct fpga_manager *__fpga_mgr_get(struct device *dev) { struct fpga_manager *mgr; + struct module *owner; mgr = to_fpga_manager(dev); + owner = mgr->owner; - if (!try_module_get(dev->parent->driver->owner)) - goto err_dev; + if (owner && !try_module_get(owner)) + mgr = ERR_PTR(-ENODEV); return mgr; - -err_dev: - put_device(dev); - return ERR_PTR(-ENODEV); } static int fpga_mgr_dev_match(struct device *dev, const void *data) @@ -693,12 +693,22 @@ static int fpga_mgr_dev_match(struct device *dev, const void *data) */ struct fpga_manager *fpga_mgr_get(struct device *dev) { - struct device *mgr_dev = class_find_device(&fpga_mgr_class, NULL, dev, - fpga_mgr_dev_match); + struct fpga_manager *mgr = ERR_PTR(-ENODEV); + struct device *mgr_dev; + + mutex_lock(&mgr_lock); + + mgr_dev = class_find_device(&fpga_mgr_class, NULL, dev, fpga_mgr_dev_match); if (!mgr_dev) - return ERR_PTR(-ENODEV); + goto out; + + mgr = __fpga_mgr_get(mgr_dev); + if (IS_ERR(mgr)) + put_device(mgr_dev); - return __fpga_mgr_get(mgr_dev); +out: + mutex_unlock(&mgr_lock); + return mgr; } EXPORT_SYMBOL_GPL(fpga_mgr_get); @@ -711,13 +721,22 @@ EXPORT_SYMBOL_GPL(fpga_mgr_get); */ struct fpga_manager *of_fpga_mgr_get(struct device_node *node) { - struct device *dev; + struct fpga_manager *mgr = ERR_PTR(-ENODEV); + struct device *mgr_dev; + + mutex_lock(&mgr_lock); + + mgr_dev = class_find_device_by_of_node(&fpga_mgr_class, node); + if (!mgr_dev) + goto out; - dev = class_find_device_by_of_node(&fpga_mgr_class, node); - if (!dev) - return ERR_PTR(-ENODEV); + mgr = __fpga_mgr_get(mgr_dev); + if (IS_ERR(mgr)) + put_device(mgr_dev); - return __fpga_mgr_get(dev); +out: + mutex_unlock(&mgr_lock); + return mgr; } EXPORT_SYMBOL_GPL(of_fpga_mgr_get); @@ -727,8 +746,12 @@ EXPORT_SYMBOL_GPL(of_fpga_mgr_get); */ void fpga_mgr_put(struct fpga_manager *mgr) { - module_put(mgr->dev.parent->driver->owner); + mutex_lock(&mgr_lock); + + module_put(mgr->owner); put_device(&mgr->dev); + + mutex_unlock(&mgr_lock); } EXPORT_SYMBOL_GPL(fpga_mgr_put); @@ -806,6 +829,7 @@ fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *in mgr->name = info->name; mgr->mops = info->mops; + mgr->owner = info->mops->owner; mgr->priv = info->priv; mgr->compat_id = info->compat_id; diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h index 54f63459efd6..eaf6e072dbc0 100644 --- a/include/linux/fpga/fpga-mgr.h +++ b/include/linux/fpga/fpga-mgr.h @@ -162,6 +162,7 @@ struct fpga_manager_info { * @write_complete: set FPGA to operating state after writing is done * @fpga_remove: optional: Set FPGA into a specific state during driver remove * @groups: optional attribute groups. + * @owner: owner module. * * fpga_manager_ops are the low level functions implemented by a specific * fpga manager driver. The optional ones are tested for NULL before being @@ -184,6 +185,7 @@ struct fpga_manager_ops { struct fpga_image_info *info); void (*fpga_remove)(struct fpga_manager *mgr); const struct attribute_group **groups; + struct module *owner; }; /* FPGA manager status: Partial/Full Reconfiguration errors */ @@ -201,6 +203,7 @@ struct fpga_manager_ops { * @state: state of fpga manager * @compat_id: FPGA manager id for compatibility check. * @mops: pointer to struct of fpga manager ops + * @owner: owner module. * @priv: low level driver private date */ struct fpga_manager { @@ -210,6 +213,7 @@ struct fpga_manager { enum fpga_mgr_states state; struct fpga_compat_id *compat_id; const struct fpga_manager_ops *mops; + struct module *owner; void *priv; }; From patchwork Wed Nov 22 14:32:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marco Pagani X-Patchwork-Id: 168399 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:612c:2b07:b0:403:3b70:6f57 with SMTP id io7csp1366101vqb; Wed, 22 Nov 2023 06:33:39 -0800 (PST) X-Google-Smtp-Source: AGHT+IEmoLEb3T54M4IT+u+V+IEBqxXcpV+Fs97GE2WlA+BEunadf+Cguj/XQgbCpFNJICAk7F3p X-Received: by 2002:a05:6a00:1ca3:b0:6cb:5bf7:a50e with SMTP id y35-20020a056a001ca300b006cb5bf7a50emr10633268pfw.12.1700663619345; Wed, 22 Nov 2023 06:33:39 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1700663619; cv=none; d=google.com; s=arc-20160816; b=cc6Dqs1NBwShkEs/XLcHazSifcCONKBmiOlL8b9vz6kXnZVmeh4kt0H0IrJhoNUmlN 5Z+zj6WuUiMGgeIKx2QBhju9ykV8CMkkg2WCcUeI7ztGli3zsqFnogOefQrZV/RSv2eK Lg0EeTOzcpz9Y4unXz4QC8PHenSsRECj+spCLU6IWYrX7OAaAO92IwV61szYUp7Fs82p yVnl7xTQdl76/+uMDxW6B2EapwNnGAExITJrJeI1YHinbXFVV43Dn3IjOfujnKTdDEbc vpcs3d0XdjUdk10I4ZBYPM7VLUveRMzpwwTRdWb6DNwqkurm9/eSx2VfC5Aqub40QGXU EhSg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=shPFiNnieBfc+nA1jRG7H+c1jqVnxbi/cSpxWrKoPIY=; fh=RI0mNHrSGBk/0gJ3tsBPdYn+81ROXQTqubQc1unKFUU=; b=kzZCbWszetf1B/GFisChOUewfqCrTaLl2LLG8LdI5CK0uKYBGedFjJJNaUgGaG4643 7dzIEHZWPOEJuJn3lM+9XB57lIx3pKwPWEJwj97MNkdxd08GkRYIkSheMN5n/3dqOFf3 U2a3onKHLS6b0E0O2sz9Zfogmm6b4oIMAsZOZ4upjvZoHIxgJGyXSkvkgFxb5ubKo92N 5pLRAndeNl/db3+cJ47joqe81XWXgINInRD8ZUJSJY94H3BSUh8EKxdFbNgleMBsY1Cu +rY5+vcXI6mHK0196v2bWUpIdDIiMmQK02pJ8zCmeUKOw7x4IATP/6f0hEO3Bojr6HpU 6dkA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b="M/II50x+"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from lipwig.vger.email (lipwig.vger.email. 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[2.34.24.178]) by smtp.gmail.com with ESMTPSA id v7-20020ac87487000000b0041950c7f6d8sm4430101qtq.60.2023.11.22.06.33.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Nov 2023 06:33:14 -0800 (PST) From: Marco Pagani To: Moritz Fischer , Wu Hao , Xu Yilun , Tom Rix , Greg Kroah-Hartman Cc: Marco Pagani , linux-kernel@vger.kernel.org, linux-fpga@vger.kernel.org Subject: [RFC PATCH 2/2] fpga: set owner of fpga_manager_ops for existing low-level modules Date: Wed, 22 Nov 2023 15:32:52 +0100 Message-ID: <20231122143252.181680-3-marpagan@redhat.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231122143252.181680-1-marpagan@redhat.com> References: <20231122143252.181680-1-marpagan@redhat.com> MIME-Version: 1.0 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Wed, 22 Nov 2023 06:33:36 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1783275055467617912 X-GMAIL-MSGID: 1783275055467617912 This patch tentatively set the owner field of fpga_manager_ops to THIS_MODULE for existing fpga manager low-level control modules. Signed-off-by: Marco Pagani --- drivers/fpga/altera-cvp.c | 1 + drivers/fpga/altera-pr-ip-core.c | 1 + drivers/fpga/altera-ps-spi.c | 1 + drivers/fpga/dfl-fme-mgr.c | 1 + drivers/fpga/ice40-spi.c | 1 + drivers/fpga/lattice-sysconfig.c | 1 + drivers/fpga/machxo2-spi.c | 1 + drivers/fpga/microchip-spi.c | 1 + drivers/fpga/socfpga-a10.c | 1 + drivers/fpga/socfpga.c | 1 + drivers/fpga/stratix10-soc.c | 1 + drivers/fpga/tests/fpga-mgr-test.c | 1 + drivers/fpga/tests/fpga-region-test.c | 1 + drivers/fpga/ts73xx-fpga.c | 1 + drivers/fpga/versal-fpga.c | 1 + drivers/fpga/xilinx-spi.c | 1 + drivers/fpga/zynq-fpga.c | 1 + drivers/fpga/zynqmp-fpga.c | 1 + 18 files changed, 18 insertions(+) diff --git a/drivers/fpga/altera-cvp.c b/drivers/fpga/altera-cvp.c index 4ffb9da537d8..aeb913547dd8 100644 --- a/drivers/fpga/altera-cvp.c +++ b/drivers/fpga/altera-cvp.c @@ -520,6 +520,7 @@ static const struct fpga_manager_ops altera_cvp_ops = { .write_init = altera_cvp_write_init, .write = altera_cvp_write, .write_complete = altera_cvp_write_complete, + .owner = THIS_MODULE, }; static const struct cvp_priv cvp_priv_v1 = { diff --git a/drivers/fpga/altera-pr-ip-core.c b/drivers/fpga/altera-pr-ip-core.c index df8671af4a92..354221c609e6 100644 --- a/drivers/fpga/altera-pr-ip-core.c +++ b/drivers/fpga/altera-pr-ip-core.c @@ -171,6 +171,7 @@ static const struct fpga_manager_ops alt_pr_ops = { .write_init = alt_pr_fpga_write_init, .write = alt_pr_fpga_write, .write_complete = alt_pr_fpga_write_complete, + .owner = THIS_MODULE, }; int alt_pr_register(struct device *dev, void __iomem *reg_base) diff --git a/drivers/fpga/altera-ps-spi.c b/drivers/fpga/altera-ps-spi.c index 740980e7cef8..3be05796a6fc 100644 --- a/drivers/fpga/altera-ps-spi.c +++ b/drivers/fpga/altera-ps-spi.c @@ -228,6 +228,7 @@ static const struct fpga_manager_ops altera_ps_ops = { .write_init = altera_ps_write_init, .write = altera_ps_write, .write_complete = altera_ps_write_complete, + .owner = THIS_MODULE, }; static int altera_ps_probe(struct spi_device *spi) diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl-fme-mgr.c index ab228d8837a0..740ce82e3ac9 100644 --- a/drivers/fpga/dfl-fme-mgr.c +++ b/drivers/fpga/dfl-fme-mgr.c @@ -264,6 +264,7 @@ static const struct fpga_manager_ops fme_mgr_ops = { .write = fme_mgr_write, .write_complete = fme_mgr_write_complete, .status = fme_mgr_status, + .owner = THIS_MODULE, }; static void fme_mgr_get_compat_id(void __iomem *fme_pr, diff --git a/drivers/fpga/ice40-spi.c b/drivers/fpga/ice40-spi.c index 7cbb3558b844..97afa6dc5d76 100644 --- a/drivers/fpga/ice40-spi.c +++ b/drivers/fpga/ice40-spi.c @@ -130,6 +130,7 @@ static const struct fpga_manager_ops ice40_fpga_ops = { .write_init = ice40_fpga_ops_write_init, .write = ice40_fpga_ops_write, .write_complete = ice40_fpga_ops_write_complete, + .owner = THIS_MODULE, }; static int ice40_fpga_probe(struct spi_device *spi) diff --git a/drivers/fpga/lattice-sysconfig.c b/drivers/fpga/lattice-sysconfig.c index ba51a60f672f..1393cdd11e49 100644 --- a/drivers/fpga/lattice-sysconfig.c +++ b/drivers/fpga/lattice-sysconfig.c @@ -348,6 +348,7 @@ static const struct fpga_manager_ops sysconfig_fpga_mgr_ops = { .write_init = sysconfig_ops_write_init, .write = sysconfig_ops_write, .write_complete = sysconfig_ops_write_complete, + .owner = THIS_MODULE, }; int sysconfig_probe(struct sysconfig_priv *priv) diff --git a/drivers/fpga/machxo2-spi.c b/drivers/fpga/machxo2-spi.c index 905607992a12..46193a47f863 100644 --- a/drivers/fpga/machxo2-spi.c +++ b/drivers/fpga/machxo2-spi.c @@ -358,6 +358,7 @@ static const struct fpga_manager_ops machxo2_ops = { .write_init = machxo2_write_init, .write = machxo2_write, .write_complete = machxo2_write_complete, + .owner = THIS_MODULE, }; static int machxo2_spi_probe(struct spi_device *spi) diff --git a/drivers/fpga/microchip-spi.c b/drivers/fpga/microchip-spi.c index 2a82c726d6e5..023ccdf2d5da 100644 --- a/drivers/fpga/microchip-spi.c +++ b/drivers/fpga/microchip-spi.c @@ -362,6 +362,7 @@ static const struct fpga_manager_ops mpf_ops = { .write_init = mpf_ops_write_init, .write = mpf_ops_write, .write_complete = mpf_ops_write_complete, + .owner = THIS_MODULE, }; static int mpf_probe(struct spi_device *spi) diff --git a/drivers/fpga/socfpga-a10.c b/drivers/fpga/socfpga-a10.c index cc4861e345c9..a8ab74b30006 100644 --- a/drivers/fpga/socfpga-a10.c +++ b/drivers/fpga/socfpga-a10.c @@ -463,6 +463,7 @@ static const struct fpga_manager_ops socfpga_a10_fpga_mgr_ops = { .write_init = socfpga_a10_fpga_write_init, .write = socfpga_a10_fpga_write, .write_complete = socfpga_a10_fpga_write_complete, + .owner = THIS_MODULE, }; static int socfpga_a10_fpga_probe(struct platform_device *pdev) diff --git a/drivers/fpga/socfpga.c b/drivers/fpga/socfpga.c index 723ea0ad3f09..87f3f4a367d0 100644 --- a/drivers/fpga/socfpga.c +++ b/drivers/fpga/socfpga.c @@ -538,6 +538,7 @@ static const struct fpga_manager_ops socfpga_fpga_ops = { .write_init = socfpga_fpga_ops_configure_init, .write = socfpga_fpga_ops_configure_write, .write_complete = socfpga_fpga_ops_configure_complete, + .owner = THIS_MODULE, }; static int socfpga_fpga_probe(struct platform_device *pdev) diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c index cacb9cc5757e..63a5a2fe4911 100644 --- a/drivers/fpga/stratix10-soc.c +++ b/drivers/fpga/stratix10-soc.c @@ -393,6 +393,7 @@ static const struct fpga_manager_ops s10_ops = { .write_init = s10_ops_write_init, .write = s10_ops_write, .write_complete = s10_ops_write_complete, + .owner = THIS_MODULE, }; static int s10_probe(struct platform_device *pdev) diff --git a/drivers/fpga/tests/fpga-mgr-test.c b/drivers/fpga/tests/fpga-mgr-test.c index 6acec55b60ce..4c2a3e98f8ad 100644 --- a/drivers/fpga/tests/fpga-mgr-test.c +++ b/drivers/fpga/tests/fpga-mgr-test.c @@ -187,6 +187,7 @@ static const struct fpga_manager_ops fake_mgr_ops = { .write = op_write, .write_sg = op_write_sg, .write_complete = op_write_complete, + .owner = THIS_MODULE, }; static void fpga_mgr_test_get(struct kunit *test) diff --git a/drivers/fpga/tests/fpga-region-test.c b/drivers/fpga/tests/fpga-region-test.c index baab07e3fc59..2705c1b33d09 100644 --- a/drivers/fpga/tests/fpga-region-test.c +++ b/drivers/fpga/tests/fpga-region-test.c @@ -52,6 +52,7 @@ static int op_write(struct fpga_manager *mgr, const char *buf, size_t count) */ static const struct fpga_manager_ops fake_mgr_ops = { .write = op_write, + .owner = THIS_MODULE, }; static int op_enable_set(struct fpga_bridge *bridge, bool enable) diff --git a/drivers/fpga/ts73xx-fpga.c b/drivers/fpga/ts73xx-fpga.c index 4e1d2a4d3df4..20b8db0d150a 100644 --- a/drivers/fpga/ts73xx-fpga.c +++ b/drivers/fpga/ts73xx-fpga.c @@ -96,6 +96,7 @@ static const struct fpga_manager_ops ts73xx_fpga_ops = { .write_init = ts73xx_fpga_write_init, .write = ts73xx_fpga_write, .write_complete = ts73xx_fpga_write_complete, + .owner = THIS_MODULE, }; static int ts73xx_fpga_probe(struct platform_device *pdev) diff --git a/drivers/fpga/versal-fpga.c b/drivers/fpga/versal-fpga.c index 3710e8f01be2..02fd8ed36ff0 100644 --- a/drivers/fpga/versal-fpga.c +++ b/drivers/fpga/versal-fpga.c @@ -40,6 +40,7 @@ static int versal_fpga_ops_write(struct fpga_manager *mgr, static const struct fpga_manager_ops versal_fpga_ops = { .write_init = versal_fpga_ops_write_init, .write = versal_fpga_ops_write, + .owner = THIS_MODULE, }; static int versal_fpga_probe(struct platform_device *pdev) diff --git a/drivers/fpga/xilinx-spi.c b/drivers/fpga/xilinx-spi.c index e1a227e7ff2a..d58cf0ccbd41 100644 --- a/drivers/fpga/xilinx-spi.c +++ b/drivers/fpga/xilinx-spi.c @@ -218,6 +218,7 @@ static const struct fpga_manager_ops xilinx_spi_ops = { .write_init = xilinx_spi_write_init, .write = xilinx_spi_write, .write_complete = xilinx_spi_write_complete, + .owner = THIS_MODULE, }; static int xilinx_spi_probe(struct spi_device *spi) diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c index 96611d424a10..241e1fe48a13 100644 --- a/drivers/fpga/zynq-fpga.c +++ b/drivers/fpga/zynq-fpga.c @@ -548,6 +548,7 @@ static const struct fpga_manager_ops zynq_fpga_ops = { .write_init = zynq_fpga_ops_write_init, .write_sg = zynq_fpga_ops_write, .write_complete = zynq_fpga_ops_write_complete, + .owner = THIS_MODULE, }; static int zynq_fpga_probe(struct platform_device *pdev) diff --git a/drivers/fpga/zynqmp-fpga.c b/drivers/fpga/zynqmp-fpga.c index f3434e2c487b..2f66400d2330 100644 --- a/drivers/fpga/zynqmp-fpga.c +++ b/drivers/fpga/zynqmp-fpga.c @@ -101,6 +101,7 @@ static const struct fpga_manager_ops zynqmp_fpga_ops = { .state = zynqmp_fpga_ops_state, .write_init = zynqmp_fpga_ops_write_init, .write = zynqmp_fpga_ops_write, + .owner = THIS_MODULE, }; static int zynqmp_fpga_probe(struct platform_device *pdev)