diff mbox series

[v2,5/9] usb: host: xhci: use ffs() in xhci_mem_init()

Message ID 20220303110903.1662404-6-mathias.nyman@linux.intel.com (mailing list archive)
State Accepted
Commit 81720ec5320c3a02a4b2faf597127de5478cbf02
Headers show
Series xhci cleanups and fixes for usb-next | expand

Commit Message

Mathias Nyman March 3, 2022, 11:08 a.m. UTC 
From: Linyu Yuan <quic_linyyuan@quicinc.com>

The for loop to find page size bit can be replaced with ffs().

Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
 drivers/usb/host/xhci-mem.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 48114a462908..938eb2b907ab 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2391,11 +2391,7 @@  int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
 	page_size = readl(&xhci->op_regs->page_size);
 	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
 			"Supported page size register = 0x%x", page_size);
-	for (i = 0; i < 16; i++) {
-		if ((0x1 & page_size) != 0)
-			break;
-		page_size = page_size >> 1;
-	}
+	i = ffs(page_size);
 	if (i < 16)
 		xhci_dbg_trace(xhci, trace_xhci_dbg_init,
 			"Supported page size of %iK", (1 << (i+12)) / 1024);