crypto: caam - fix DECO RSR polling
authorHoria Geanta <horia.geanta@freescale.com>
Mon, 21 Jul 2014 13:03:21 +0000 (16:03 +0300)
committerHerbert Xu <herbert@gondor.apana.org.au>
Wed, 23 Jul 2014 13:31:37 +0000 (21:31 +0800)
RSR (Request Source Register) is not used when
virtualization is disabled, thus don't poll for Valid bit.

Besides this, if used, timeout has to be reinitialized.

Signed-off-by: Horia Geanta <horia.geanta@freescale.com>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
drivers/crypto/caam/ctrl.c

index cedb565..3cade79 100644 (file)
@@ -89,12 +89,15 @@ static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc,
        /* Set the bit to request direct access to DECO0 */
        topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
 
-       if (ctrlpriv->virt_en == 1)
+       if (ctrlpriv->virt_en == 1) {
                setbits32(&topregs->ctrl.deco_rsr, DECORSR_JR0);
 
-       while (!(rd_reg32(&topregs->ctrl.deco_rsr) & DECORSR_VALID) &&
-              --timeout)
-               cpu_relax();
+               while (!(rd_reg32(&topregs->ctrl.deco_rsr) & DECORSR_VALID) &&
+                      --timeout)
+                       cpu_relax();
+
+               timeout = 100000;
+       }
 
        setbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);