From ab84b77afc95fc038d71aba80aa4440bcbd67663 Mon Sep 17 00:00:00 2001 From: Ira Weiny Date: Thu, 14 Nov 2019 19:06:34 -0800 Subject: libnvdimm/namsepace: Don't set claim_class on error Don't leave claim_class set to an invalid value if an error occurs in btt_claim_class(). While we are here change the return type of __holder_class_store() to be clear about the values it is returning. This was found via code inspection. Reported-by: Dan Carpenter Reviewed-by: Vishal Verma Signed-off-by: Ira Weiny Link: https://lore.kernel.org/r/20190925211348.14082-1-ira.weiny@intel.com Signed-off-by: Dan Williams --- drivers/nvdimm/namespace_devs.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) (limited to 'drivers/nvdimm') diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index cca0a3ba1d2c..829f7bdaaa6d 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1510,16 +1510,20 @@ static ssize_t holder_show(struct device *dev, } static DEVICE_ATTR_RO(holder); -static ssize_t __holder_class_store(struct device *dev, const char *buf) +static int __holder_class_store(struct device *dev, const char *buf) { struct nd_namespace_common *ndns = to_ndns(dev); if (dev->driver || ndns->claim) return -EBUSY; - if (sysfs_streq(buf, "btt")) - ndns->claim_class = btt_claim_class(dev); - else if (sysfs_streq(buf, "pfn")) + if (sysfs_streq(buf, "btt")) { + int rc = btt_claim_class(dev); + + if (rc < NVDIMM_CCLASS_NONE) + return rc; + ndns->claim_class = rc; + } else if (sysfs_streq(buf, "pfn")) ndns->claim_class = NVDIMM_CCLASS_PFN; else if (sysfs_streq(buf, "dax")) ndns->claim_class = NVDIMM_CCLASS_DAX; @@ -1528,10 +1532,6 @@ static ssize_t __holder_class_store(struct device *dev, const char *buf) else return -EINVAL; - /* btt_claim_class() could've returned an error */ - if (ndns->claim_class < 0) - return ndns->claim_class; - return 0; } @@ -1539,7 +1539,7 @@ static ssize_t holder_class_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct nd_region *nd_region = to_nd_region(dev->parent); - ssize_t rc; + int rc; nd_device_lock(dev); nvdimm_bus_lock(dev); @@ -1547,7 +1547,7 @@ static ssize_t holder_class_store(struct device *dev, rc = __holder_class_store(dev, buf); if (rc >= 0) rc = nd_namespace_label_update(nd_region, dev); - dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc); + dev_dbg(dev, "%s(%d)\n", rc < 0 ? "fail " : "", rc); nvdimm_bus_unlock(dev); nd_device_unlock(dev); -- cgit