From patchwork Mon Nov 14 18:58:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 13042703 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5B3AAC43219 for ; Mon, 14 Nov 2022 18:58:28 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.443514.698071 (Exim 4.92) (envelope-from ) id 1oueet-0004uw-Sq; Mon, 14 Nov 2022 18:58:15 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 443514.698071; Mon, 14 Nov 2022 18:58:15 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1oueet-0004up-P8; Mon, 14 Nov 2022 18:58:15 +0000 Received: by outflank-mailman (input) for mailman id 443514; Mon, 14 Nov 2022 18:58:14 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1oueer-0004uP-My for xen-devel@lists.xenproject.org; Mon, 14 Nov 2022 18:58:14 +0000 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 46c81b66-644e-11ed-8fd2-01056ac49cbb; Mon, 14 Nov 2022 19:58:09 +0100 (CET) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2022 10:58:07 -0800 Received: from black.fi.intel.com ([10.237.72.28]) by orsmga002.jf.intel.com with ESMTP; 14 Nov 2022 10:58:00 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id D3F58339; Mon, 14 Nov 2022 20:58:24 +0200 (EET) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 46c81b66-644e-11ed-8fd2-01056ac49cbb DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1668452290; x=1699988290; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=numBEsV1q/Om3fxX1l7iCo0BjtXyl8aomr/TeEIcP9Q=; b=VSJqgRIb2g2/P9EZLQCDdEtfonV+JioxPyu8NIR7CsfQxfD0VYJQ6vr0 7SCkUuJuKz37JgoLVFZBYEiqFUgwtFF8uvlbnspXFA+mVVWHfkrG1yQxC EThb2KKs8hn2qzBsehlktSyIedAtz0S740GA/KPb1cF9nJ6F+hlZ/C/lY kBeFVM/OuXEIt5qRK6T+mpuyflERjqBOdLcg542HlSk28+5EMY5f6TQXQ 7pjsbqoMiIgTAQIyMJHbP9xAGp4H/Kp1xgz1LjUGQPfvjlkHioOpCxcPu L+lPC7Xb6GVgNv9OgeMrKUuR90fWJsXB4Dlw/B4iY+cTOsFxOo/ddhioZ g==; X-IronPort-AV: E=McAfee;i="6500,9779,10531"; a="295415986" X-IronPort-AV: E=Sophos;i="5.96,164,1665471600"; d="scan'208";a="295415986" X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10531"; a="638607275" X-IronPort-AV: E=Sophos;i="5.96,164,1665471600"; d="scan'208";a="638607275" From: Andy Shevchenko To: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= , Mika Westerberg , Andy Shevchenko , Michael Ellerman , Arnd Bergmann , Bjorn Helgaas , "Rafael J. Wysocki" , =?utf-8?q?Pali_Roh=C3=A1r?= , Juergen Gross , Dominik Brodowski , linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org Cc: Miguel Ojeda , Richard Henderson , Ivan Kokshaysky , Matt Turner , Russell King , Thomas Bogendoerfer , Nicholas Piggin , Christophe Leroy , "David S. Miller" , Bjorn Helgaas , Stefano Stabellini , Oleksandr Tyshchenko Subject: [PATCH v3 2/4] PCI: Split pci_bus_for_each_resource_p() out of pci_bus_for_each_resource() Date: Mon, 14 Nov 2022 20:58:20 +0200 Message-Id: <20221114185822.65038-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221114185822.65038-1-andriy.shevchenko@linux.intel.com> References: <20221114185822.65038-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Refactor pci_bus_for_each_resource() in the same way as it's done in pci_dev_for_each_resource() case. This will allow to hide iterator inside the loop, where it's not used otherwise. No functional changes intended. Signed-off-by: Andy Shevchenko --- .clang-format | 1 + drivers/pci/bus.c | 7 +++---- drivers/pci/hotplug/shpchp_sysfs.c | 8 ++++---- drivers/pci/pci.c | 5 ++--- drivers/pci/probe.c | 2 +- drivers/pci/setup-bus.c | 10 ++++------ include/linux/pci.h | 14 ++++++++++---- 7 files changed, 25 insertions(+), 22 deletions(-) diff --git a/.clang-format b/.clang-format index 08d579fea6cf..b61fd8791346 100644 --- a/.clang-format +++ b/.clang-format @@ -520,6 +520,7 @@ ForEachMacros: - 'of_property_for_each_string' - 'of_property_for_each_u32' - 'pci_bus_for_each_resource' + - 'pci_bus_for_each_resource_p' - 'pci_dev_for_each_resource' - 'pci_dev_for_each_resource_p' - 'pci_doe_for_each_off' diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 3cef835b375f..fc8e9c11c5f2 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -161,13 +161,13 @@ static int pci_bus_alloc_from_region(struct pci_bus *bus, struct resource *res, void *alignf_data, struct pci_bus_region *region) { - int i, ret; struct resource *r, avail; resource_size_t max; + int ret; type_mask |= IORESOURCE_TYPE_BITS; - pci_bus_for_each_resource(bus, r, i) { + pci_bus_for_each_resource_p(bus, r) { resource_size_t min_used = min; if (!r) @@ -264,9 +264,8 @@ bool pci_bus_clip_resource(struct pci_dev *dev, int idx) struct resource *res = &dev->resource[idx]; struct resource orig_res = *res; struct resource *r; - int i; - pci_bus_for_each_resource(bus, r, i) { + pci_bus_for_each_resource_p(bus, r) { resource_size_t start, end; if (!r) diff --git a/drivers/pci/hotplug/shpchp_sysfs.c b/drivers/pci/hotplug/shpchp_sysfs.c index 64beed7a26be..ff04f0c5e7c3 100644 --- a/drivers/pci/hotplug/shpchp_sysfs.c +++ b/drivers/pci/hotplug/shpchp_sysfs.c @@ -24,16 +24,16 @@ static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char *buf) { struct pci_dev *pdev; - int index, busnr; struct resource *res; struct pci_bus *bus; size_t len = 0; + int busnr; pdev = to_pci_dev(dev); bus = pdev->subordinate; len += sysfs_emit_at(buf, len, "Free resources: memory\n"); - pci_bus_for_each_resource(bus, res, index) { + pci_bus_for_each_resource_p(bus, res) { if (res && (res->flags & IORESOURCE_MEM) && !(res->flags & IORESOURCE_PREFETCH)) { len += sysfs_emit_at(buf, len, @@ -43,7 +43,7 @@ static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char } } len += sysfs_emit_at(buf, len, "Free resources: prefetchable memory\n"); - pci_bus_for_each_resource(bus, res, index) { + pci_bus_for_each_resource_p(bus, res) { if (res && (res->flags & IORESOURCE_MEM) && (res->flags & IORESOURCE_PREFETCH)) { len += sysfs_emit_at(buf, len, @@ -53,7 +53,7 @@ static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char } } len += sysfs_emit_at(buf, len, "Free resources: IO\n"); - pci_bus_for_each_resource(bus, res, index) { + pci_bus_for_each_resource_p(bus, res) { if (res && (res->flags & IORESOURCE_IO)) { len += sysfs_emit_at(buf, len, "start = %8.8llx, length = %8.8llx\n", diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 9f3cc829dfee..9cb9939f0e79 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -782,9 +782,8 @@ struct resource *pci_find_parent_resource(const struct pci_dev *dev, { const struct pci_bus *bus = dev->bus; struct resource *r; - int i; - pci_bus_for_each_resource(bus, r, i) { + pci_bus_for_each_resource_p(bus, r) { if (!r) continue; if (resource_contains(r, res)) { @@ -802,7 +801,7 @@ struct resource *pci_find_parent_resource(const struct pci_dev *dev, * be both a positively-decoded aperture and a * subtractively-decoded region that contain the BAR. * We want the positively-decoded one, so this depends - * on pci_bus_for_each_resource() giving us those + * on pci_bus_for_each_resource_p() giving us those * first. */ return r; diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 1e234189aff1..8ec59b895c60 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -533,7 +533,7 @@ void pci_read_bridge_bases(struct pci_bus *child) pci_read_bridge_mmio_pref(child); if (dev->transparent) { - pci_bus_for_each_resource(child->parent, res, i) { + pci_bus_for_each_resource_p(child->parent, res) { if (res && res->flags) { pci_bus_add_resource(child, res, PCI_SUBTRACTIVE_DECODE); diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 7ba5f1ca0e38..1e9896eaf89c 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -770,9 +770,8 @@ static struct resource *find_bus_resource_of_type(struct pci_bus *bus, unsigned long type) { struct resource *r, *r_assigned = NULL; - int i; - pci_bus_for_each_resource(bus, r, i) { + pci_bus_for_each_resource_p(bus, r) { if (r == &ioport_resource || r == &iomem_resource) continue; if (r && (r->flags & type_mask) == type && !r->parent) @@ -1204,7 +1203,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head) additional_mmio_pref_size = 0; struct resource *pref; struct pci_host_bridge *host; - int hdr_type, i, ret; + int hdr_type, ret; list_for_each_entry(dev, &bus->devices, bus_list) { struct pci_bus *b = dev->subordinate; @@ -1228,7 +1227,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head) host = to_pci_host_bridge(bus->bridge); if (!host->size_windows) return; - pci_bus_for_each_resource(bus, pref, i) + pci_bus_for_each_resource_p(bus, pref) if (pref && (pref->flags & IORESOURCE_PREFETCH)) break; hdr_type = -1; /* Intentionally invalid - not a PCI device. */ @@ -1333,12 +1332,11 @@ EXPORT_SYMBOL(pci_bus_size_bridges); static void assign_fixed_resource_on_bus(struct pci_bus *b, struct resource *r) { - int i; struct resource *parent_r; unsigned long mask = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH; - pci_bus_for_each_resource(b, parent_r, i) { + pci_bus_for_each_resource_p(b, parent_r) { if (!parent_r) continue; diff --git a/include/linux/pci.h b/include/linux/pci.h index 010996c2801a..7b2dcadfc457 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1433,10 +1433,16 @@ int devm_request_pci_bus_resources(struct device *dev, /* Temporary until new and working PCI SBR API in place */ int pci_bridge_secondary_bus_reset(struct pci_dev *dev); -#define pci_bus_for_each_resource(bus, res, i) \ - for (i = 0; \ - (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \ - i++) +#define __pci_bus_for_each_resource(bus, res, __i, vartype) \ + for (vartype __i = 0; \ + res = pci_bus_resource_n(bus, __i), __i < PCI_BRIDGE_RESOURCE_NUM; \ + __i++) + +#define pci_bus_for_each_resource(bus, res, i) \ + __pci_bus_for_each_resource(bus, res, i, ) + +#define pci_bus_for_each_resource_p(bus, res) \ + __pci_bus_for_each_resource(bus, res, i, unsigned int) int __must_check pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, resource_size_t size,