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crypto: caam - fix DECO RSR polling 

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>
This commit is contained in:
Horia Geanta 2014-07-21 16:03:21 +03:00 committed by Herbert Xu
parent 71d932d99d
commit 8f1da7b945
1 changed files with 7 additions and 4 deletions
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11
drivers/crypto/caam/ctrl.c
View 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);