On 8/27/19 8:18 AM, Andy Shevchenko wrote:
This simplifies and standardizes slot manipulation code
by using for_each_set_bit() library function.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reviewed-by: Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
---
drivers/pci/pcie/aer.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index b45bc47d04fe..f883f81d759a 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -15,6 +15,7 @@
#define pr_fmt(fmt) "AER: " fmt
#define dev_fmt pr_fmt
+#include <linux/bitops.h>
#include <linux/cper.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
@@ -657,7 +658,8 @@ const struct attribute_group aer_stats_attr_group = {
static void pci_dev_aer_stats_incr(struct pci_dev *pdev,
struct aer_err_info *info)
{
- int status, i, max = -1;
+ unsigned long status = info->status & ~info->mask;
+ int i, max = -1;
u64 *counter = NULL;
struct aer_stats *aer_stats = pdev->aer_stats;
@@ -682,10 +684,8 @@ static void pci_dev_aer_stats_incr(struct pci_dev *pdev,
break;
}
- status = (info->status & ~info->mask);
- for (i = 0; i < max; i++)
- if (status & (1 << i))
- counter[i]++;
+ for_each_set_bit(i, &status, max)
+ counter[i]++;
}
static void pci_rootport_aer_stats_incr(struct pci_dev *pdev,
@@ -717,14 +717,11 @@ static void __print_tlp_header(struct pci_dev *dev,
static void __aer_print_error(struct pci_dev *dev,
struct aer_err_info *info)
{
- int i, status;
+ unsigned long status = info->status & ~info->mask;
const char *errmsg = NULL;
- status = (info->status & ~info->mask);
-
- for (i = 0; i < 32; i++) {
- if (!(status & (1 << i)))
- continue;
+ int i;
+ for_each_set_bit(i, &status, 32) {
if (info->severity == AER_CORRECTABLE)
errmsg = i < ARRAY_SIZE(aer_correctable_error_string) ?
aer_correctable_error_string[i] : NULL;
--
Sathyanarayanan Kuppuswamy
Linux kernel developer
