From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELvdEplJDq9VhwCJ0qBfsPdBRTbx2UUFcYVwUfDf+9sO5UKct/uYx7xjPpz9LrOZ3rFrq3BN ARC-Seal: i=1; a=rsa-sha256; t=1521800394; cv=none; d=google.com; s=arc-20160816; b=xbP1zUsRpf4IqGjACU8H/Qf1ZZ5W+FDD/pcHRfdeozYVtmRA0Qp+ji1tyxROV04zgc fz/U3kQtltsMel9Xv6CkTHF//hyEKFMJI0S0aXHDLlYppNYiJubaFbHxKS6hvChdYqIk X/if4DEmoCbCaLELnEbTGOswBMd8fv25JI9/ZRL8GkS9FJ/XS8wJ7RQZWfGvPkx3OXJ+ kjMS8e9YPM++g6jc2OtH8snXs1kuwQfh71bvVjz1BM1frCJXXu16EF3ZWe6GqIX6rTjI 6/BIuO1O25Z/UrYZqFceK5RWHIZt2IIXf3bHRs2mSyBhvCI6oC/oMQRCDjsBAvZzvPXw naiw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=EVM510W4nY9KHTZIBKgOX2d3Cw8OG3g5HAzVx/mWTqI=; b=u9irPg4sGmpvf3UtxqLZ4NwrZ4etrHOuC80DJIILFua7MaNme3lX6xhE/yuXMB050b 4rm7larMjgBEYDepio5JkyAAgVv2/ecPZpJeRvtV6I91R/lC3mPE0oAta4cgUnkO8kgW IeqQZyISPCtYTLK5VxQ+z5atNAX4yNxDOg0or3L8NNrn9ywQZ2p6c//vO7A4hLCc8Kg8 k1imDVBR4BEWAAUuCQIh5TlC+zIjXOpj3TXFV9ZLaaq0ororlVRmFKtuitZEQbGE5Fl0 jE35XQ8p8QRpk2t3usELCOLM5p/dVe7nOf4u/2V8qp40oYXJAh4jfVf2JcdnXv2NWoJ2 Ts5A== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.61.202 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.61.202 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ron Economos , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 3.18 39/47] media: [RESEND] media: dvb-frontends: Add delay to Si2168 restart Date: Fri, 23 Mar 2018 10:55:30 +0100 Message-Id: <20180323094249.789901624@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180323094248.117679641@linuxfoundation.org> References: <20180323094248.117679641@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1595721946835267818?= X-GMAIL-MSGID: =?utf-8?q?1595723370552066309?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ron Economos [ Upstream commit 380a6c86457573aa42d27ae11e025eb25941a0b7 ] On faster CPUs a delay is required after the resume command and the restart command. Without the delay, the restart command often returns -EREMOTEIO and 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 Signed-off-by: Greg Kroah-Hartman --- drivers/media/dvb-frontends/si2168.c | 3 +++ 1 file changed, 3 insertions(+) --- 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. */ +#include + #include "si2168_priv.h" static const struct dvb_frontend_ops si2168_ops; @@ -380,6 +382,7 @@ static int si2168_init(struct dvb_fronte if (ret) goto err; + udelay(100); memcpy(cmd.args, "\x85", 1); cmd.wlen = 1; cmd.rlen = 1;