i7300_idle: Cleanup based review comments
Cleanup of i7300 idle driver based on review comments from Randy Dunlap,
Andi Kleen and Len Brown.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/idle/i7300_idle.c b/drivers/idle/i7300_idle.c
index 79d47f2..fb176f6 100644
--- a/drivers/idle/i7300_idle.c
+++ b/drivers/idle/i7300_idle.c
@@ -35,6 +35,8 @@
#define I7300_IDLE_DRIVER_VERSION "1.55"
#define I7300_PRINT "i7300_idle:"
+#define MAX_STOP_RETRIES 10
+
static int debug;
module_param_named(debug, debug, uint, 0644);
MODULE_PARM_DESC(debug, "Enable debug printks in this driver");
@@ -47,12 +49,12 @@
* 0 = No throttling
* 1 = Throttle when > 4 activations per eval window (Maximum throttling)
* 2 = Throttle when > 8 activations
- * 168 = Throttle when > 168 activations (Minimum throttling)
+ * 168 = Throttle when > 672 activations (Minimum throttling)
*/
-#define MAX_THRTLWLIMIT 168
-static uint i7300_idle_thrtlowlm = 1;
-module_param_named(thrtlwlimit, i7300_idle_thrtlowlm, uint, 0644);
-MODULE_PARM_DESC(thrtlwlimit,
+#define MAX_THROTTLE_LOW_LIMIT 168
+static uint throttle_low_limit = 1;
+module_param_named(throttle_low_limit, throttle_low_limit, uint, 0644);
+MODULE_PARM_DESC(throttle_low_limit,
"Value for THRTLOWLM activation field "
"(0 = disable throttle, 1 = Max throttle, 168 = Min throttle)");
@@ -111,9 +113,9 @@
static void i7300_idle_ioat_stop(void)
{
int i;
- u8 sts;
+ u64 sts;
- for (i = 0; i < 5; i++) {
+ for (i = 0; i < MAX_STOP_RETRIES; i++) {
writeb(IOAT_CHANCMD_RESET,
ioat_chanbase + IOAT1_CHANCMD_OFFSET);
@@ -127,9 +129,10 @@
}
- if (i == 5)
- dprintk("failed to suspend+reset I/O AT after 5 retries\n");
-
+ if (i == MAX_STOP_RETRIES) {
+ dprintk("failed to stop I/O AT after %d retries\n",
+ MAX_STOP_RETRIES);
+ }
}
/* Test I/O AT by copying 1024 byte from 2k to 1k */
@@ -276,7 +279,7 @@
i7300_idle_ioat_stop();
/* Wait for a while for the channel to halt before releasing */
- for (i = 0; i < 10; i++) {
+ for (i = 0; i < MAX_STOP_RETRIES; i++) {
writeb(IOAT_CHANCMD_RESET,
ioat_chanbase + IOAT1_CHANCMD_OFFSET);
@@ -390,9 +393,9 @@
new_ctl = i7300_idle_thrtctl_saved & ~DIMM_THRTCTL_THRMHUNT;
pci_write_config_byte(fbd_dev, DIMM_THRTCTL, new_ctl);
- limit = i7300_idle_thrtlowlm;
- if (unlikely(limit > MAX_THRTLWLIMIT))
- limit = MAX_THRTLWLIMIT;
+ limit = throttle_low_limit;
+ if (unlikely(limit > MAX_THROTTLE_LOW_LIMIT))
+ limit = MAX_THROTTLE_LOW_LIMIT;
pci_write_config_byte(fbd_dev, DIMM_THRTLOW, limit);
@@ -441,7 +444,7 @@
static ktime_t idle_begin_time;
static int time_init = 1;
- if (!i7300_idle_thrtlowlm)
+ if (!throttle_low_limit)
return 0;
if (unlikely(time_init)) {