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media: dvb: Add check on sp8870_readreg

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In sp8870_set_frontend_parameters, the function sp8870_readreg
may return an error when i2c_transfer fails. The fix checks for
this error and returns upstream consistent with other invocations.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Aditya Pakki 2018-12-27 13:58:01 -05:00 committed by Mauro Carvalho Chehab
parent 0f787c12ee
commit 467a37fba9
1 changed files with 3 additions and 1 deletions
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4
drivers/media/dvb-frontends/sp8870.c
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@ -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)
return err;
// system controller start
sp8870_microcontroller_start(state);