dmaengine: idxd: Simplify WQ attribute visibility checks

The functions that check if WQ attributes are invisible are almost
duplicate. Define a helper to simplify these functions and future
WQ attribute visibility checks as well.

Signed-off-by: Fenghua Yu <[e-mail]>
Reviewed-by: Dave Jiang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/idxd/sysfs.c

···
 	NULL,
 };
 
-static bool idxd_wq_attr_op_config_invisible(struct attribute *attr,
-					     struct idxd_device *idxd)
-{
-	return attr == &dev_attr_wq_op_config.attr &&
-	       !idxd->hw.wq_cap.op_config;
-}
+/*  A WQ attr is invisible if the feature is not supported in WQCAP. */
+#define idxd_wq_attr_invisible(name, cap_field, a, idxd)		\
+	((a) == &dev_attr_wq_##name.attr && !(idxd)->hw.wq_cap.cap_field)
 
 static bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr,
 						  struct idxd_device *idxd)
···
 	       idxd->data->type == IDXD_TYPE_IAX;
 }
 
-static bool idxd_wq_attr_wq_prs_disable_invisible(struct attribute *attr,
-						  struct idxd_device *idxd)
-{
-	return attr == &dev_attr_wq_prs_disable.attr &&
-	       !idxd->hw.wq_cap.wq_prs_support;
-}
-
 static umode_t idxd_wq_attr_visible(struct kobject *kobj,
 				    struct attribute *attr, int n)
 {
···
 	struct idxd_wq *wq = confdev_to_wq(dev);
 	struct idxd_device *idxd = wq->idxd;
 
-	if (idxd_wq_attr_op_config_invisible(attr, idxd))
+	if (idxd_wq_attr_invisible(op_config, op_config, attr, idxd))
 		return 0;
 
 	if (idxd_wq_attr_max_batch_size_invisible(attr, idxd))
 		return 0;
 
-	if (idxd_wq_attr_wq_prs_disable_invisible(attr, idxd))
+	if (idxd_wq_attr_invisible(prs_disable, wq_prs_support, attr, idxd))
 		return 0;
 
 	return attr->mode;