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AJvYcCWDuymnE+pJPr3jNrLZvpJB410cFbHxqsmMDMTBvMGzbo04ymXG7y3Ah/mGiPixcT3GyAXlpEFqiyjuODKLE25lqTdGcVGkZuhc2QGBqG2LAn47iOk= X-Gm-Message-State: AOJu0YziXiEWs/n+8h14Ap1PCNCPNqKSVT88Iy54A/agS+yWcKUAbNwb DoyFZxan9+mZGh9K9S/iWoErUyeW26TuXAyGnkmL9AC/RV4GZWjglKJvPYfvi2tbzZKBy5O2xU+ Yj0CaIBO3pd1ibQ== X-Google-Smtp-Source: AGHT+IHRQA3n5GfF0BAtqxsFhNOUIMEXcJ7+XDV5u7QRPNR+Gdp77qx8MK2Ot4WCnaL1W/7lk2smyonaDUUJGAU= X-Received: from saravanak.san.corp.google.com ([2620:15c:2d:3:96d3:321a:67f3:5322]) (user=saravanak job=sendgmr) by 2002:a05:6902:708:b0:dd9:1db5:8348 with SMTP id k8-20020a056902070800b00dd91db58348mr3605580ybt.8.1712641037031; Mon, 08 Apr 2024 22:37:17 -0700 (PDT) Date: Mon, 8 Apr 2024 22:37:03 -0700 In-Reply-To: <20240409053704.428336-1-saravanak@google.com> Message-Id: <20240409053704.428336-3-saravanak@google.com> Mime-Version: 1.0 References: <20240409053704.428336-1-saravanak@google.com> X-Mailer: git-send-email 2.44.0.478.gd926399ef9-goog Subject: [RFC PATCH v2 2/2] of: dynamic: Fix probing of overlay devices From: Saravana Kannan To: Herve Codina , Geert Uytterhoeven Cc: Saravana Kannan , Rob Herring , kernel-team@android.com, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-spi@vger.kernel.org, linux-acpi@vger.kernel.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240408_223720_206245_8A001C13 X-CRM114-Status: GOOD ( 11.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Get fw_devlink to work well with overlay devices. Signed-off-by: Saravana Kannan --- drivers/base/core.c | 23 +++++++++++++++++++++++ drivers/of/dynamic.c | 1 + include/linux/fwnode.h | 1 + 3 files changed, 25 insertions(+) diff --git a/drivers/base/core.c b/drivers/base/core.c index 5f4e03336e68..5ce33dbd7560 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -237,6 +237,29 @@ static void __fw_devlink_pickup_dangling_consumers(struct fwnode_handle *fwnode, __fw_devlink_pickup_dangling_consumers(child, new_sup); } + +void fw_devlink_fixup_new_fwnode(struct fwnode_handle *new_fwnode) +{ + struct fwnode_handle *parent; + + if (new_fwnode->dev && new_fwnode->dev->bus) + return; + + fwnode_for_each_parent_node(new_fwnode, parent) + if (parent->dev && parent->dev->bus) + break; + + if (!parent) + return; + + mutex_lock(&fwnode_link_lock); + __fw_devlink_pickup_dangling_consumers(new_fwnode, parent); + __fw_devlink_link_to_consumers(parent->dev); + mutex_unlock(&fwnode_link_lock); + + fwnode_handle_put(parent); +} + static DEFINE_MUTEX(device_links_lock); DEFINE_STATIC_SRCU(device_links_srcu); diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index 19a1a38554f2..a2ad79ea9a06 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -581,6 +581,7 @@ static int __of_changeset_entry_notify(struct of_changeset_entry *ce, memset(&rd, 0, sizeof(rd)); rd.dn = ce->np; ret = of_reconfig_notify(ce->action, &rd); + fw_devlink_fixup_new_fwnode(of_fwnode_handle(ce->np)); break; case OF_RECONFIG_ADD_PROPERTY: case OF_RECONFIG_REMOVE_PROPERTY: diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 0d79070c5a70..230aeccef6f3 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -220,6 +220,7 @@ int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup, u8 flags); void fwnode_links_purge(struct fwnode_handle *fwnode); void fw_devlink_purge_absent_suppliers(struct fwnode_handle *fwnode); +void fw_devlink_fixup_new_fwnode(struct fwnode_handle *new_fwnode); bool fw_devlink_is_strict(void); #endif