Define separate simple show functions for each attribute instead of
having a one big one containing a chain of conditionals.
Replaced scnprintf calls with sprintf since all the outputs are short
bounded strings or single integers.
All of the device attributes are read-only, so use DEVICE_ATTR_RO to
define them.
Signed-off-by: Jeremy Sowden <jeremy@xxxxxxxxxx>
---
drivers/staging/kpc2000/kpc2000/cell_probe.c | 136 ++++++++++++-------
1 file changed, 90 insertions(+), 46 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc2000/cell_probe.c b/drivers/staging/kpc2000/kpc2000/cell_probe.c
index 6a2ebdf20113..3798f8e2e165 100644
--- a/drivers/staging/kpc2000/kpc2000/cell_probe.c
+++ b/drivers/staging/kpc2000/kpc2000/cell_probe.c
@@ -145,55 +145,100 @@ struct kpc_uio_device {
u16 core_num;
};
-static ssize_t show_attr(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t offset_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
- struct kpc_uio_device *kudev = dev_get_drvdata(dev);
-
- #define ATTR_NAME_CMP(v) (strcmp(v, attr->attr.name) == 0)
- if ATTR_NAME_CMP("offset"){
- return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.offset);
- } else if ATTR_NAME_CMP("size"){
- return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.length);
- } else if ATTR_NAME_CMP("type"){
- return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.type);
- }
- else if ATTR_NAME_CMP("s2c_dma"){
- if (kudev->cte.s2c_dma_present){
- return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.s2c_dma_channel_num);
- } else {
- return scnprintf(buf, PAGE_SIZE, "not present\n");
- }
- } else if ATTR_NAME_CMP("c2s_dma"){
- if (kudev->cte.c2s_dma_present){
- return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.c2s_dma_channel_num);
- } else {
- return scnprintf(buf, PAGE_SIZE, "not present\n");
- }
- }
- else if ATTR_NAME_CMP("irq_count"){
- return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.irq_count);
- } else if ATTR_NAME_CMP("irq_base_num"){
- return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.irq_base_num);
- } else if ATTR_NAME_CMP("core_num"){
- return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->core_num);
- } else {
- return 0;
- }
- #undef ATTR_NAME_CMP
+ struct kpc_uio_device *kudev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", kudev->cte.offset);
+}
+
+static ssize_t size_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kpc_uio_device *kudev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", kudev->cte.length);
}
+static ssize_t type_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kpc_uio_device *kudev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", kudev->cte.type);
+}
+
+static ssize_t s2c_dma_ch_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return 0;
+}
+
+static ssize_t c2s_dma_ch_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return 0;
+}
+
+static ssize_t s2c_dma_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kpc_uio_device *kudev = dev_get_drvdata(dev);
-DEVICE_ATTR(offset, 0444, show_attr, NULL);
-DEVICE_ATTR(size, 0444, show_attr, NULL);
-DEVICE_ATTR(type, 0444, show_attr, NULL);
-DEVICE_ATTR(s2c_dma_ch, 0444, show_attr, NULL);
-DEVICE_ATTR(c2s_dma_ch, 0444, show_attr, NULL);
-DEVICE_ATTR(s2c_dma, 0444, show_attr, NULL);
-DEVICE_ATTR(c2s_dma, 0444, show_attr, NULL);
-DEVICE_ATTR(irq_count, 0444, show_attr, NULL);
-DEVICE_ATTR(irq_base_num, 0444, show_attr, NULL);
-DEVICE_ATTR(core_num, 0444, show_attr, NULL);
-struct attribute * kpc_uio_class_attrs[] = {
+ if (!kudev->cte.s2c_dma_present)
+ return sprintf(buf, "%s", "not present\n");
+
+ return sprintf(buf, "%u\n", kudev->cte.s2c_dma_channel_num);
+}
+
+static ssize_t c2s_dma_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kpc_uio_device *kudev = dev_get_drvdata(dev);
+
+ if (!kudev->cte.c2s_dma_present)
+ return sprintf(buf, "%s", "not present\n");
+
+ return sprintf(buf, "%u\n", kudev->cte.c2s_dma_channel_num);
+}
+
+static ssize_t irq_count_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kpc_uio_device *kudev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", kudev->cte.irq_count);
+}
+
+static ssize_t irq_base_num_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct kpc_uio_device *kudev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", kudev->cte.irq_base_num);
+}
+
+static ssize_t core_num_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kpc_uio_device *kudev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", kudev->core_num);
+}
+
+DEVICE_ATTR_RO(offset);
+DEVICE_ATTR_RO(size);
+DEVICE_ATTR_RO(type);
+DEVICE_ATTR_RO(s2c_dma_ch);
+DEVICE_ATTR_RO(c2s_dma_ch);
+DEVICE_ATTR_RO(s2c_dma);
+DEVICE_ATTR_RO(c2s_dma);
+DEVICE_ATTR_RO(irq_count);
+DEVICE_ATTR_RO(irq_base_num);
+DEVICE_ATTR_RO(core_num);
+
+struct attribute *kpc_uio_class_attrs[] = {
&dev_attr_offset.attr,
&dev_attr_size.attr,
&dev_attr_type.attr,
@@ -207,7 +252,6 @@ struct attribute * kpc_uio_class_attrs[] = {
NULL,
};
-
static
int kp2000_check_uio_irq(struct kp2000_device *pcard, u32 irq_num)
{
--
2.20.1
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
