NX842 coprocessor sets bit 3 if queue is overflow. It is just for information to the user. So the driver prints this informative message and ignores it. Signed-off-by: Haren Myneni <haren@xxxxxxxxxx> diff --git a/arch/powerpc/include/asm/icswx.h b/arch/powerpc/include/asm/icswx.h index 9f8402b..d1a2a2d 100644 --- a/arch/powerpc/include/asm/icswx.h +++ b/arch/powerpc/include/asm/icswx.h @@ -164,6 +164,7 @@ struct coprocessor_request_block { #define ICSWX_INITIATED (0x8) #define ICSWX_BUSY (0x4) #define ICSWX_REJECTED (0x2) +#define ICSWX_BIT3 (0x1) /* undefined or set from XERSO. */ static inline int icswx(__be32 ccw, struct coprocessor_request_block *crb) { diff --git a/drivers/crypto/nx/nx-842-powernv.c b/drivers/crypto/nx/nx-842-powernv.c index 9ef51fa..321b8e8 100644 --- a/drivers/crypto/nx/nx-842-powernv.c +++ b/drivers/crypto/nx/nx-842-powernv.c @@ -442,6 +442,15 @@ static int nx842_powernv_function(const unsigned char *in, unsigned int inlen, (unsigned int)ccw, (unsigned int)be32_to_cpu(crb->ccw)); + /* + * NX842 coprocessor uses 3rd bit to report queue overflow which is + * not an error, just for information to user. So, ignore this bit. + */ + if (ret & ICSWX_BIT3) { + pr_info_ratelimited("842 coprocessor queue overflow\n"); + ret &= ~ICSWX_BIT3; + } + switch (ret) { case ICSWX_INITIATED: ret = wait_for_csb(wmem, csb); -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html