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Thu, 8 Mar 2018 01:50:19 -0500 Received: from mail-by2nam03on0101.outbound.protection.outlook.com ([104.47.42.101]:17968 "EHLO NAM03-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965057AbeCHE6O (ORCPT ); Wed, 7 Mar 2018 23:58:14 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Ron Economos , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH AUTOSEL for 4.14 18/67] media: [RESEND] media: dvb-frontends: Add delay to Si2168 restart Thread-Topic: [PATCH AUTOSEL for 4.14 18/67] media: [RESEND] media: dvb-frontends: Add delay to Si2168 restart Thread-Index: AQHTtpn7b7I8zGGJXU2Obh9xwEToTA== Date: Thu, 8 Mar 2018 04:57:39 +0000 Message-ID: <20180308045641.7814-18-alexander.levin@microsoft.com> References: <20180308045641.7814-1-alexander.levin@microsoft.com> In-Reply-To: <20180308045641.7814-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB0808;20:R06XrvPg6nGMTAU2+2nFP7nvBbKqaJ+kSCUb2J+MSvttXDAya/H1XThV4zzBJF4cJ7H/YPqWFLEmNuXmFzogyKQpcHPNAYtV8e6ENzcBQPtYNFO2QKFHeP77UEP4d4js0nKd9t53xo3wAoijfmp+gc3AIzmrbqRogL/btH84hFg= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 61f00f57-9dad-45dc-5b9e-08d584b13214 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB0808; 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Without the delay, the restart command often returns -EREMOTEIO a= nd the Si2168 does not restart. Note that this patch fixes the same issue as https://patchwork.linuxtv.org/= patch/44304/, but I believe my udelay() fix addresses the actual problem. Signed-off-by: Ron Economos Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/dvb-frontends/si2168.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/dvb-frontends/si2168.c b/drivers/media/dvb-front= ends/si2168.c index 172fc367ccaa..24840a2e5a75 100644 --- a/drivers/media/dvb-frontends/si2168.c +++ b/drivers/media/dvb-frontends/si2168.c @@ -14,6 +14,8 @@ * GNU General Public License for more details. */ =20 +#include + #include "si2168_priv.h" =20 static const struct dvb_frontend_ops si2168_ops; @@ -435,6 +437,7 @@ static int si2168_init(struct dvb_frontend *fe) if (ret) goto err; =20 + udelay(100); memcpy(cmd.args, "\x85", 1); cmd.wlen =3D 1; cmd.rlen =3D 1; --=20 2.14.1