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| author | Alaa Emad <alaaemadhossney.ae@gmail.com> | 2021-05-03 13:57:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-03 08:22:08 +0200 |
| commit | f7adc025facdc000053bfd89f552e3c33ed5cd22 (patch) | |
| tree | d9a49e918caa3986aefaa1b4bcc21121f77bd35b /drivers/media | |
| parent | 7811cd97e1f83300ea90bb3ac9a38e2f6f9ae3b1 (diff) | |
media: dvb: Add check on sp8870_readreg return
[ Upstream commit c6d822c56e7fd29e6fa1b1bb91b98f6a1e942b3c ]
The function sp8870_readreg returns a negative value when i2c_transfer
fails so properly check for this and return the error if it happens.
Cc: Sean Young <sean@mess.org>
Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Alaa Emad <alaaemadhossney.ae@gmail.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-60-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb-frontends/sp8870.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/media/dvb-frontends/sp8870.c b/drivers/media/dvb-frontends/sp8870.c index e87ac30d7fb8..b43135c5a960 100644 --- a/drivers/media/dvb-frontends/sp8870.c +++ b/drivers/media/dvb-frontends/sp8870.c @@ -293,7 +293,9 @@ static int sp8870_set_frontend_parameters(struct dvb_frontend *fe) sp8870_writereg(state, 0xc05, reg0xc05); // read status reg in order to clear pending irqs - sp8870_readreg(state, 0x200); + err = sp8870_readreg(state, 0x200); + if (err < 0) + return err; // system controller start sp8870_microcontroller_start(state); |