From: Linyu Yuan Date: Thu, 3 Mar 2022 11:08:59 +0000 (+0200) Subject: usb: host: xhci: use ffs() in xhci_mem_init() X-Git-Tag: v6.1-rc5~1706^2~68 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=81720ec5320c3a02a4b2faf597127de5478cbf02;p=platform%2Fkernel%2Flinux-starfive.git usb: host: xhci: use ffs() in xhci_mem_init() The for loop to find page size bit can be replaced with ffs(). Signed-off-by: Linyu Yuan Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20220303110903.1662404-6-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 48114a4..938eb2b 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);