linux-kernel - [PATCH 3.2 02/87] [media] media: dvb-core: Don't force CAN_INVERSION

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Message-ID: <lsq.1454975631.39379168@decadent.org.uk>
Date:	Mon, 08 Feb 2016 23:53:51 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Mauro Carvalho Chehab" <mchehab@....samsung.com>,
	"Malcolm Priestley" <tvboxspy@...il.com>
Subject: [PATCH 3.2 02/87] [media] media: dvb-core: Don't force
 CAN_INVERSION_AUTO in oneshot mode

3.2.77-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Malcolm Priestley <tvboxspy@...il.com>

commit c9d57de6103e343f2d4e04ea8d9e417e10a24da7 upstream.

When in FE_TUNE_MODE_ONESHOT the frontend must report
the actual capabilities so user can take appropriate
action.

With frontends that can't do auto inversion this is done
by dvb-core automatically so CAN_INVERSION_AUTO is valid.

However, when in FE_TUNE_MODE_ONESHOT this is not true.

So only set FE_CAN_INVERSION_AUTO in modes other than
FE_TUNE_MODE_ONESHOT

Signed-off-by: Malcolm Priestley <tvboxspy@...il.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/media/dvb/dvb-core/dvb_frontend.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -1661,9 +1661,9 @@ static int dvb_frontend_ioctl_legacy(str
 		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
 		dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
 
-		/* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
-		 * do it, it is done for it. */
-		info->caps |= FE_CAN_INVERSION_AUTO;
+		/* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
+		if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
+			info->caps |= FE_CAN_INVERSION_AUTO;
 		err = 0;
 		break;
 	}