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| author | Linyu Yuan <quic_linyyuan@quicinc.com> | 2022-03-03 12:08:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-03 15:46:07 +0100 |
| commit | 81720ec5320c3a02a4b2faf597127de5478cbf02 (patch) | |
| tree | 3da785d521bc9c930b5d451ee34de2c467cf65b0 /drivers/usb | |
| parent | xhci: fix runtime PM imbalance in USB2 resume (diff) | |
| download | linux-81720ec5320c3a02a4b2faf597127de5478cbf02.tar.xz linux-81720ec5320c3a02a4b2faf597127de5478cbf02.zip | |
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 <quic_linyyuan@quicinc.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220303110903.1662404-6-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 6 |
1 files changed, 1 insertions, 5 deletions
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); |