[PATCH] hpet: hpet driver cleanups
- Use kzalloc() instead of kmalloc + memset.
- Clean/fix some printk's.
- Use NULL for pointers instead of 0.
- Combine hpet busy searching locations into a function call.
Signed-off-by: Randy Dunlap <randy_d_dunlap@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 86a2ee4..3808d95 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -284,7 +284,8 @@
if (io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT,
PAGE_SIZE, vma->vm_page_prot)) {
- printk(KERN_ERR "remap_pfn_range failed in hpet.c\n");
+ printk(KERN_ERR "%s: io_remap_pfn_range failed\n",
+ __FUNCTION__);
return -EAGAIN;
}
@@ -565,6 +566,17 @@
.mmap = hpet_mmap,
};
+static int hpet_is_known(struct hpet_data *hdp)
+{
+ struct hpets *hpetp;
+
+ for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
+ if (hpetp->hp_hpet_phys == hdp->hd_phys_address)
+ return 1;
+
+ return 0;
+}
+
EXPORT_SYMBOL(hpet_alloc);
EXPORT_SYMBOL(hpet_register);
EXPORT_SYMBOL(hpet_unregister);
@@ -730,11 +742,10 @@
#ifdef CONFIG_TIME_INTERPOLATION
struct time_interpolator *ti;
- ti = kmalloc(sizeof(*ti), GFP_KERNEL);
+ ti = kzalloc(sizeof(*ti), GFP_KERNEL);
if (!ti)
return;
- memset(ti, 0, sizeof(*ti));
ti->source = TIME_SOURCE_MMIO64;
ti->shift = 10;
ti->addr = &hpetp->hp_hpet->hpet_mc;
@@ -799,32 +810,29 @@
struct hpets *hpetp;
size_t siz;
struct hpet __iomem *hpet;
- static struct hpets *last = (struct hpets *)0;
+ static struct hpets *last = NULL;
unsigned long period;
unsigned long long temp;
/*
* hpet_alloc can be called by platform dependent code.
- * if platform dependent code has allocated the hpet
- * ACPI also reports hpet, then we catch it here.
+ * If platform dependent code has allocated the hpet that
+ * ACPI has also reported, then we catch it here.
*/
- for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
- if (hpetp->hp_hpet_phys == hdp->hd_phys_address) {
- printk(KERN_DEBUG "%s: duplicate HPET ignored\n",
- __FUNCTION__);
- return 0;
- }
+ if (hpet_is_known(hdp)) {
+ printk(KERN_DEBUG "%s: duplicate HPET ignored\n",
+ __FUNCTION__);
+ return 0;
+ }
siz = sizeof(struct hpets) + ((hdp->hd_nirqs - 1) *
sizeof(struct hpet_dev));
- hpetp = kmalloc(siz, GFP_KERNEL);
+ hpetp = kzalloc(siz, GFP_KERNEL);
if (!hpetp)
return -ENOMEM;
- memset(hpetp, 0, siz);
-
hpetp->hp_which = hpet_nhpet++;
hpetp->hp_hpet = hdp->hd_address;
hpetp->hp_hpet_phys = hdp->hd_phys_address;
@@ -911,7 +919,6 @@
struct hpet_data *hdp;
acpi_status status;
struct acpi_resource_address64 addr;
- struct hpets *hpetp;
hdp = data;
@@ -924,13 +931,12 @@
hdp->hd_phys_address = addr.min_address_range;
hdp->hd_address = ioremap(addr.min_address_range, size);
- for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
- if (hpetp->hp_hpet_phys == hdp->hd_phys_address) {
- printk(KERN_DEBUG "%s: 0x%lx is busy\n",
- __FUNCTION__, hdp->hd_phys_address);
- iounmap(hdp->hd_address);
- return -EBUSY;
- }
+ if (hpet_is_known(hdp)) {
+ printk(KERN_DEBUG "%s: 0x%lx is busy\n",
+ __FUNCTION__, hdp->hd_phys_address);
+ iounmap(hdp->hd_address);
+ return -EBUSY;
+ }
} else if (res->id == ACPI_RSTYPE_FIXED_MEM32) {
struct acpi_resource_fixed_mem32 *fixmem32;
@@ -942,13 +948,12 @@
hdp->hd_address = ioremap(fixmem32->range_base_address,
HPET_RANGE_SIZE);
- for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
- if (hpetp->hp_hpet_phys == hdp->hd_phys_address) {
- printk(KERN_DEBUG "%s: 0x%lx is busy\n",
- __FUNCTION__, hdp->hd_phys_address);
- iounmap(hdp->hd_address);
- return -EBUSY;
- }
+ if (hpet_is_known(hdp)) {
+ printk(KERN_DEBUG "%s: 0x%lx is busy\n",
+ __FUNCTION__, hdp->hd_phys_address);
+ iounmap(hdp->hd_address);
+ return -EBUSY;
+ }
} else if (res->id == ACPI_RSTYPE_EXT_IRQ) {
struct acpi_resource_ext_irq *irqp;
int i;