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Subject: [PATCH v2 1/4] cxl/mem: Use sysfs_emit() for attribute show routines
From:   Dan Williams <dan.j.williams@intel.com>
To:     linux-cxl@vger.kernel.org
Cc:     Jason Gunthorpe <jgg@nvidia.com>,
        Ben Widawsky <ben.widawsky@intel.com>,
        Jason Gunthorpe <jgg@nvidia.com>, linux-kernel@vger.kernel.org,
        vishal.l.verma@intel.com, ira.weiny@intel.com,
        alison.schofield@intel.com
Date:   Mon, 29 Mar 2021 19:47:44 -0700
Message-ID: <161707246420.2072157.2319415706768984458.stgit@dwillia2-desk3.amr.corp.intel.com>
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References: <161707245893.2072157.6743322596719518693.stgit@dwillia2-desk3.amr.corp.intel.com>
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While none the CXL sysfs attributes are threatening to overrun a
PAGE_SIZE of output, it is good form to use the recommended helpers.

Fixes: b39cb1052a5c ("cxl/mem: Register CXL memX devices")
Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Ben Widawsky <ben.widawsky@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/161661971101.1721612.16412318662284948582.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/cxl/mem.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
index ecfc9ccdba8d..30bf4f0f3c17 100644
--- a/drivers/cxl/mem.c
+++ b/drivers/cxl/mem.c
@@ -1066,7 +1066,7 @@ static ssize_t firmware_version_show(struct device *dev,
 	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
 	struct cxl_mem *cxlm = cxlmd->cxlm;
 
-	return sprintf(buf, "%.16s\n", cxlm->firmware_version);
+	return sysfs_emit(buf, "%.16s\n", cxlm->firmware_version);
 }
 static DEVICE_ATTR_RO(firmware_version);
 
@@ -1076,7 +1076,7 @@ static ssize_t payload_max_show(struct device *dev,
 	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
 	struct cxl_mem *cxlm = cxlmd->cxlm;
 
-	return sprintf(buf, "%zu\n", cxlm->payload_size);
+	return sysfs_emit(buf, "%zu\n", cxlm->payload_size);
 }
 static DEVICE_ATTR_RO(payload_max);
 
@@ -1087,7 +1087,7 @@ static ssize_t ram_size_show(struct device *dev, struct device_attribute *attr,
 	struct cxl_mem *cxlm = cxlmd->cxlm;
 	unsigned long long len = range_len(&cxlm->ram_range);
 
-	return sprintf(buf, "%#llx\n", len);
+	return sysfs_emit(buf, "%#llx\n", len);
 }
 
 static struct device_attribute dev_attr_ram_size =
@@ -1100,7 +1100,7 @@ static ssize_t pmem_size_show(struct device *dev, struct device_attribute *attr,
 	struct cxl_mem *cxlm = cxlmd->cxlm;
 	unsigned long long len = range_len(&cxlm->pmem_range);
 
-	return sprintf(buf, "%#llx\n", len);
+	return sysfs_emit(buf, "%#llx\n", len);
 }
 
 static struct device_attribute dev_attr_pmem_size =