From patchwork Sun Dec 31 10:30:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 759555 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8525A566D for ; Sun, 31 Dec 2023 10:31:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="jNmW28IT" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1704018690; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hqcqn3wVFqcuHnInqOuIW31KNg+Ka5D/Uw9Vs/4vzU0=; b=jNmW28ITqbs7FUdKY7XFxU+2wRAX5BUv3427xVFBnHTXaIbwo1kSHPU6laDZYpE4gITfAF ERYRWFLx3r1lUEnuj1rTo+4BHMSZuxv4g3xKubFQJOwYNY4KPaF/vNXgg59qb5ZBg/6eLJ Xy3/pE1QikDJjC8rZg2qUCDzzjaeWoM= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-659--f0QRKQEOnat25G1pLQ1lA-1; Sun, 31 Dec 2023 05:31:27 -0500 X-MC-Unique: -f0QRKQEOnat25G1pLQ1lA-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 965E0101A52A; Sun, 31 Dec 2023 10:31:26 +0000 (UTC) Received: from localhost.localdomain (unknown [10.39.192.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1D43E492BC6; Sun, 31 Dec 2023 10:31:25 +0000 (UTC) From: Hans de Goede To: Mauro Carvalho Chehab , Sakari Ailus , Andy Shevchenko Cc: Hans de Goede , Kate Hsuan , Tsuchiya Yuto , Yury Luneff , Nable , andrey.i.trufanov@gmail.com, Fabio Aiuto , linux-media@vger.kernel.org, linux-staging@lists.linux.dev Subject: [PATCH 11/15] media: atomisp: Replace atomisp_drvfs attr with using driver.dev_groups attr Date: Sun, 31 Dec 2023 11:30:53 +0100 Message-ID: <20231231103057.35837-12-hdegoede@redhat.com> In-Reply-To: <20231231103057.35837-1-hdegoede@redhat.com> References: <20231231103057.35837-1-hdegoede@redhat.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 sysfs attributes preferably should not be manually be registered but instead the driver.groups / driver.dev_groups driver struct members should be used to have the driver core handle this in a race free manner. Using driver.groups would be the most direct replacement for driver_[add|remove]_file, but some of the attributes actually need access to the struct atomisp_device (*), so as part of modernizing this part of the atomisp driver this change also makes the sysfs attribute device attributes instead of driver attributes. *) Before this change accessing these attributes without the driver having bound would result in a NULL pointer deref, this commit fixes this. Signed-off-by: Hans de Goede --- .../staging/media/atomisp/pci/atomisp_drvfs.c | 148 +++++++----------- .../staging/media/atomisp/pci/atomisp_drvfs.h | 5 +- .../staging/media/atomisp/pci/atomisp_v4l2.c | 9 +- 3 files changed, 62 insertions(+), 100 deletions(-) diff --git a/drivers/staging/media/atomisp/pci/atomisp_drvfs.c b/drivers/staging/media/atomisp/pci/atomisp_drvfs.c index 1df534bf54d3..293171da1266 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_drvfs.c +++ b/drivers/staging/media/atomisp/pci/atomisp_drvfs.c @@ -27,31 +27,17 @@ #include "hmm/hmm.h" #include "ia_css_debug.h" +#define OPTION_BIN_LIST BIT(0) +#define OPTION_BIN_RUN BIT(1) +#define OPTION_VALID (OPTION_BIN_LIST | OPTION_BIN_RUN) + /* - * _iunit_debug: - * dbglvl: iunit css driver trace level * dbgopt: iunit debug option: * bit 0: binary list * bit 1: running binary * bit 2: memory statistic -*/ -struct _iunit_debug { - struct device_driver *drv; - struct atomisp_device *isp; - unsigned int dbglvl; - unsigned int dbgfun; - unsigned int dbgopt; -}; - -#define OPTION_BIN_LIST BIT(0) -#define OPTION_BIN_RUN BIT(1) -#define OPTION_VALID (OPTION_BIN_LIST \ - | OPTION_BIN_RUN) - -static struct _iunit_debug iunit_debug = { - .dbglvl = 0, - .dbgopt = OPTION_BIN_LIST, -}; + */ +unsigned int dbgopt = OPTION_BIN_LIST; static inline int iunit_dump_dbgopt(struct atomisp_device *isp, unsigned int opt) @@ -88,34 +74,44 @@ static inline int iunit_dump_dbgopt(struct atomisp_device *isp, return ret; } -static ssize_t iunit_dbglvl_show(struct device_driver *drv, char *buf) +static ssize_t dbglvl_show(struct device *dev, struct device_attribute *attr, + char *buf) { - iunit_debug.dbglvl = dbg_level; - return sysfs_emit(buf, "dtrace level:%u\n", iunit_debug.dbglvl); + unsigned int dbglvl = ia_css_debug_get_dtrace_level(); + + return sysfs_emit(buf, "dtrace level:%u\n", dbglvl); } -static ssize_t iunit_dbglvl_store(struct device_driver *drv, const char *buf, - size_t size) +static ssize_t dbglvl_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) { - if (kstrtouint(buf, 10, &iunit_debug.dbglvl) - || iunit_debug.dbglvl < 1 - || iunit_debug.dbglvl > 9) { + unsigned int dbglvl; + int ret; + + ret = kstrtouint(buf, 10, &dbglvl); + if (ret) + return ret; + + if (dbglvl < 1 || dbglvl > 9) return -ERANGE; - } - ia_css_debug_set_dtrace_level(iunit_debug.dbglvl); + ia_css_debug_set_dtrace_level(dbglvl); return size; } +static DEVICE_ATTR_RW(dbglvl); -static ssize_t iunit_dbgfun_show(struct device_driver *drv, char *buf) +static ssize_t dbgfun_show(struct device *dev, struct device_attribute *attr, + char *buf) { - iunit_debug.dbgfun = atomisp_get_css_dbgfunc(); - return sysfs_emit(buf, "dbgfun opt:%u\n", iunit_debug.dbgfun); + unsigned int dbgfun = atomisp_get_css_dbgfunc(); + + return sysfs_emit(buf, "dbgfun opt:%u\n", dbgfun); } -static ssize_t iunit_dbgfun_store(struct device_driver *drv, const char *buf, - size_t size) +static ssize_t dbgfun_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) { + struct atomisp_device *isp = dev_get_drvdata(dev); unsigned int opt; int ret; @@ -123,23 +119,20 @@ static ssize_t iunit_dbgfun_store(struct device_driver *drv, const char *buf, if (ret) return ret; - ret = atomisp_set_css_dbgfunc(iunit_debug.isp, opt); - if (ret) - return ret; + return atomisp_set_css_dbgfunc(isp, opt); +} +static DEVICE_ATTR_RW(dbgfun); - iunit_debug.dbgfun = opt; - - return size; +static ssize_t dbgopt_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sysfs_emit(buf, "option:0x%x\n", dbgopt); } -static ssize_t iunit_dbgopt_show(struct device_driver *drv, char *buf) -{ - return sysfs_emit(buf, "option:0x%x\n", iunit_debug.dbgopt); -} - -static ssize_t iunit_dbgopt_store(struct device_driver *drv, const char *buf, - size_t size) +static ssize_t dbgopt_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) { + struct atomisp_device *isp = dev_get_drvdata(dev); unsigned int opt; int ret; @@ -147,56 +140,27 @@ static ssize_t iunit_dbgopt_store(struct device_driver *drv, const char *buf, if (ret) return ret; - iunit_debug.dbgopt = opt; - ret = iunit_dump_dbgopt(iunit_debug.isp, iunit_debug.dbgopt); + dbgopt = opt; + ret = iunit_dump_dbgopt(isp, dbgopt); if (ret) return ret; return size; } +static DEVICE_ATTR_RW(dbgopt); -static const struct driver_attribute iunit_drvfs_attrs[] = { - __ATTR(dbglvl, 0644, iunit_dbglvl_show, iunit_dbglvl_store), - __ATTR(dbgfun, 0644, iunit_dbgfun_show, iunit_dbgfun_store), - __ATTR(dbgopt, 0644, iunit_dbgopt_show, iunit_dbgopt_store), +static struct attribute *dbg_attrs[] = { + &dev_attr_dbglvl.attr, + &dev_attr_dbgfun.attr, + &dev_attr_dbgopt.attr, + NULL }; -static int iunit_drvfs_create_files(struct device_driver *drv) -{ - int i, ret = 0; +static const struct attribute_group dbg_attr_group = { + .attrs = dbg_attrs, +}; - for (i = 0; i < ARRAY_SIZE(iunit_drvfs_attrs); i++) - ret |= driver_create_file(drv, &iunit_drvfs_attrs[i]); - - return ret; -} - -static void iunit_drvfs_remove_files(struct device_driver *drv) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(iunit_drvfs_attrs); i++) - driver_remove_file(drv, &iunit_drvfs_attrs[i]); -} - -int atomisp_drvfs_init(struct atomisp_device *isp) -{ - struct device_driver *drv = isp->dev->driver; - int ret; - - iunit_debug.isp = isp; - iunit_debug.drv = drv; - - ret = iunit_drvfs_create_files(iunit_debug.drv); - if (ret) { - dev_err(isp->dev, "drvfs_create_files error: %d\n", ret); - iunit_drvfs_remove_files(iunit_debug.drv); - } - - return ret; -} - -void atomisp_drvfs_exit(void) -{ - iunit_drvfs_remove_files(iunit_debug.drv); -} +const struct attribute_group *dbg_attr_groups[] = { + &dbg_attr_group, + NULL +}; diff --git a/drivers/staging/media/atomisp/pci/atomisp_drvfs.h b/drivers/staging/media/atomisp/pci/atomisp_drvfs.h index 8f4cc722b881..8495cc133c06 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_drvfs.h +++ b/drivers/staging/media/atomisp/pci/atomisp_drvfs.h @@ -19,7 +19,8 @@ #ifndef __ATOMISP_DRVFS_H__ #define __ATOMISP_DRVFS_H__ -int atomisp_drvfs_init(struct atomisp_device *isp); -void atomisp_drvfs_exit(void); +#include + +extern const struct attribute_group *dbg_attr_groups[]; #endif /* __ATOMISP_DRVFS_H__ */ diff --git a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c index 6e8c9add35f9..0c78c1d82659 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c +++ b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c @@ -1468,8 +1468,6 @@ static int atomisp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i goto error_unload_firmware; } - atomisp_drvfs_init(isp); - return 0; error_unload_firmware: @@ -1497,8 +1495,6 @@ static void atomisp_pci_remove(struct pci_dev *pdev) { struct atomisp_device *isp = pci_get_drvdata(pdev); - atomisp_drvfs_exit(); - pm_runtime_get_sync(&pdev->dev); pm_runtime_forbid(&pdev->dev); dev_pm_domain_set(&pdev->dev, NULL); @@ -1529,11 +1525,12 @@ static const struct pci_device_id atomisp_pci_tbl[] = { {PCI_DEVICE(PCI_VENDOR_ID_INTEL, ATOMISP_PCI_DEVICE_SOC_CHT)}, {0,} }; - MODULE_DEVICE_TABLE(pci, atomisp_pci_tbl); - static struct pci_driver atomisp_pci_driver = { + .driver = { + .dev_groups = dbg_attr_groups, + }, .name = "atomisp-isp2", .id_table = atomisp_pci_tbl, .probe = atomisp_pci_probe,