Path: csiph.com!1.us.feeder.erje.net!feeder.erje.net!2.us.feeder.erje.net!newsfeed.fsmpi.rwth-aachen.de!newsfeed.straub-nv.de!eternal-september.org!feeder.eternal-september.org!aioe.org!bofh.it!news.nic.it!robomod From: Toshi Kani Newsgroups: linux.kernel Subject: [PATCH v2 02/16] resource: make resource flags handled properly Date: Fri, 25 Dec 2015 23:20:02 +0100 Message-ID: References: X-Original-To: akpm@linux-foundation.org, bp@alien8.de X-Mailer: git-send-email 2.4.3 Sender: robomod@news.nic.it List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Approved: robomod@news.nic.it Lines: 59 Organization: linux.* mail to news gateway X-Original-Cc: linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Linus Torvalds , Dan Williams , "Rafael J. Wysocki" , Toshi Kani X-Original-Date: Fri, 25 Dec 2015 15:09:11 -0700 X-Original-Message-ID: <1451081365-15190-2-git-send-email-toshi.kani@hpe.com> X-Original-References: <1451081365-15190-1-git-send-email-toshi.kani@hpe.com> X-Original-Sender: linux-kernel-owner@vger.kernel.org Xref: csiph.com linux.kernel:1298129 I/O resource flags consist of I/O resource types and modifier bits. Therefore, checking an I/O resource type in 'flags' must be performed with a bitwise operation. Fix find_next_iomem_res() and region_intersects() that simply compare 'flags' against a given value. Also change __request_region() to set 'res->flags' from resource_type() and resource_ext_type() of the parent, so that children nodes will inherit the extended I/O resource type. Link: http://lkml.kernel.org/r/ Cc: Linus Torvalds Cc: Andrew Morton Cc: Borislav Petkov Cc: Dan Williams Cc: Rafael J. Wysocki Signed-off-by: Toshi Kani --- kernel/resource.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/kernel/resource.c b/kernel/resource.c index f150dbb..d30a175 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -358,7 +358,7 @@ static int find_next_iomem_res(struct resource *res, char *name, read_lock(&resource_lock); for (p = iomem_resource.child; p; p = next_resource(p, sibling_only)) { - if (p->flags != res->flags) + if ((p->flags & res->flags) != res->flags) continue; if (name && strcmp(p->name, name)) continue; @@ -519,7 +519,8 @@ int region_intersects(resource_size_t start, size_t size, const char *name) read_lock(&resource_lock); for (p = iomem_resource.child; p ; p = p->sibling) { - bool is_type = strcmp(p->name, name) == 0 && p->flags == flags; + bool is_type = strcmp(p->name, name) == 0 && + ((p->flags & flags) == flags); if (start >= p->start && start <= p->end) is_type ? type++ : other++; @@ -1071,7 +1072,7 @@ struct resource * __request_region(struct resource *parent, res->name = name; res->start = start; res->end = start + n - 1; - res->flags = resource_type(parent); + res->flags = resource_type(parent) | resource_ext_type(parent); res->flags |= IORESOURCE_BUSY | flags; write_lock(&resource_lock); -- 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/