From 1c58ce133971e7159f51f331717a61632a2a3897 Mon Sep 17 00:00:00 2001 From: Matthijs Kooijman Date: Fri, 30 Aug 2013 18:45:14 +0200 Subject: [PATCH] staging: dwc2: only read the snpsid register once This (read-only) register was read twice, storing it for later use the second time. Now it is only read once, storing it right away. Signed-off-by: Matthijs Kooijman Acked-by: Paul Zimmerman Signed-off-by: Greg Kroah-Hartman --- drivers/staging/dwc2/hcd.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/staging/dwc2/hcd.c b/drivers/staging/dwc2/hcd.c index 4e8fec0640e8..d48830414561 100644 --- a/drivers/staging/dwc2/hcd.c +++ b/drivers/staging/dwc2/hcd.c @@ -2734,7 +2734,7 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq, { struct usb_hcd *hcd; struct dwc2_host_chan *channel; - u32 snpsid, gusbcfg, hcfg; + u32 gusbcfg, hcfg; int i, num_channels; int retval = -ENOMEM; @@ -2746,10 +2746,11 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq, * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3", * as in "OTG version 2.xx" or "OTG version 3.xx". */ - snpsid = readl(hsotg->regs + GSNPSID); - if ((snpsid & 0xfffff000) != 0x4f542000 && - (snpsid & 0xfffff000) != 0x4f543000) { - dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n", snpsid); + hsotg->snpsid = readl(hsotg->regs + GSNPSID); + if ((hsotg->snpsid & 0xfffff000) != 0x4f542000 && + (hsotg->snpsid & 0xfffff000) != 0x4f543000) { + dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n", + hsotg->snpsid); retval = -ENODEV; goto error1; } @@ -2880,7 +2881,6 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq, } INIT_WORK(&hsotg->wf_otg, dwc2_conn_id_status_change); - hsotg->snpsid = readl(hsotg->regs + GSNPSID); dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x\n", hsotg->snpsid >> 12 & 0xf, hsotg->snpsid >> 8 & 0xf, hsotg->snpsid >> 4 & 0xf, hsotg->snpsid & 0xf); -- 2.34.1