Make use of lo_hi_readq/writeq() to implement xhci_read/write_64()
helpers, same as it is done in the Linux kernel.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
drivers/usb/host/xhci.h | 14 ++++----------
1 file changed, 4 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index dfbfe579b..84a14dd1f 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -24,6 +24,8 @@
#ifndef __XHCI_H
#define __XHCI_H
+#include <io-64-nonatomic-lo-hi.h>
+
#define NUM_COMMAND_TRBS 8
#define NUM_TRANSFER_TRBS 8
#define NUM_EVENT_SEGM 1 /* only one supported */
@@ -1165,19 +1167,11 @@ struct xhci_erst_entry {
*/
static inline u64 xhci_read_64(__le64 __iomem *regs)
{
- __u32 __iomem *ptr = (__u32 __iomem *)regs;
- u64 val_lo = readl(ptr);
- u64 val_hi = readl(ptr + 1);
- return val_lo + (val_hi << 32);
+ return lo_hi_readq(regs);
}
static inline void xhci_write_64(const u64 val, __le64 __iomem *regs)
{
- __u32 __iomem *ptr = (__u32 __iomem *)regs;
- u32 val_lo = lower_32_bits(val);
- u32 val_hi = upper_32_bits(val);
-
- writel(val_lo, ptr);
- writel(val_hi, ptr + 1);
+ lo_hi_writeq(val, regs);
}
/*
--
2.20.1
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