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| author | Mario Hros <git@reversity.org> | 2020-02-19 22:14:19 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-03-02 10:48:06 +0100 |
| commit | 62d19285312004bf5980d9b6c95c6bd378612f06 (patch) | |
| tree | adcbe5df8e76ce4e9f07fee865263cfc158dcfd8 | |
| parent | 806d06161af045dba29f3c7747550c93b2ea3ca9 (diff) | |
| download | linux-0-day-62d19285312004bf5980d9b6c95c6bd378612f06.tar.gz linux-0-day-62d19285312004bf5980d9b6c95c6bd378612f06.tar.xz | |
media: rtl28xxu: add missing sleep before probing slave demod
Slave demod needs some time to wake up otherwise it may not respond to the
following probe commands. This problem manifested randomly on my Astrometa
DVB-T2 dongle.
Signed-off-by: Mario Hros <git@reversity.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/rtl28xxu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c index c6881a1b32324..2080f6ef4be12 100644 --- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c +++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c @@ -552,6 +552,9 @@ tuner_found: if (ret) goto err; + /* slave demod needs some time to wake up */ + msleep(20); + /* check slave answers */ ret = rtl28xxu_ctrl_msg(d, &req_mn88472); if (ret == 0 && buf[0] == 0x02) { |