[PATCH 3/6] IB/qib: Use device_show_string() helper for sysfs attributes

Lukas Wunner
2024-04-20T20:05:04Z

Deduplicate sysfs ->show() callbacks which expose a string at a static
memory location. Use the newly introduced device_show_string() helper
in the driver core instead by declaring those sysfs attributes with
DEVICE_STRING_ATTR_RO().

No functional change intended.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
---
drivers/infiniband/hw/qib/qib.h | 1 -
drivers/infiniband/hw/qib/qib_driver.c | 6 ------
drivers/infiniband/hw/qib/qib_sysfs.c | 10 ++--------
3 files changed, 2 insertions(+), 15 deletions(-)

diff --git a/drivers/infiniband/hw/qib/qib.h b/drivers/infiniband/hw/qib/qib.h
index 26c615772be3..8ee4edd7883c 100644
--- a/drivers/infiniband/hw/qib/qib.h
+++ b/drivers/infiniband/hw/qib/qib.h
@@ -1359,7 +1359,6 @@ static inline u32 qib_get_rcvhdrtail(const struct qib_ctxtdata *rcd)
* sysfs interface.
*/

-extern const char ib_qib_version[];
extern const struct attribute_group qib_attr_group;
extern const struct attribute_group *qib_attr_port_groups[];

diff --git a/drivers/infiniband/hw/qib/qib_driver.c b/drivers/infiniband/hw/qib/qib_driver.c
index bf3fa12fe935..4fcbef99e400 100644
--- a/drivers/infiniband/hw/qib/qib_driver.c
+++ b/drivers/infiniband/hw/qib/qib_driver.c
@@ -44,12 +44,6 @@

#include "qib.h"

-/*
- * The size has to be longer than this string, so we can append
- * board/chip information to it in the init code.
- */
-const char ib_qib_version[] = QIB_DRIVER_VERSION "\n";
-
DEFINE_MUTEX(qib_mutex); /* general driver use */

unsigned qib_ibmtu;
diff --git a/drivers/infiniband/hw/qib/qib_sysfs.c b/drivers/infiniband/hw/qib/qib_sysfs.c
index 41c272980f91..53ec7510e4eb 100644
--- a/drivers/infiniband/hw/qib/qib_sysfs.c
+++ b/drivers/infiniband/hw/qib/qib_sysfs.c
@@ -585,13 +585,7 @@ static ssize_t hca_type_show(struct device *device,
static DEVICE_ATTR_RO(hca_type);
static DEVICE_ATTR(board_id, 0444, hca_type_show, NULL);

-static ssize_t version_show(struct device *device,
- struct device_attribute *attr, char *buf)
-{
- /* The string printed here is already newline-terminated. */
- return sysfs_emit(buf, "%s", (char *)ib_qib_version);
-}
-static DEVICE_ATTR_RO(version);
+static DEVICE_STRING_ATTR_RO(version, 0444, QIB_DRIVER_VERSION);

static ssize_t boardversion_show(struct device *device,
struct device_attribute *attr, char *buf)
@@ -721,7 +715,7 @@ static struct attribute *qib_attributes[] = {
&dev_attr_hw_rev.attr,
&dev_attr_hca_type.attr,
&dev_attr_board_id.attr,
- &dev_attr_version.attr,
+ &dev_attr_version.attr.attr,
&dev_attr_nctxts.attr,
&dev_attr_nfreectxts.attr,
&dev_attr_serial.attr,
--
2.43.0