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drm/panel/raspberrypi-touchscreen: Avoid NULL deref if not initialised
If a call to rpi_touchscreen_i2c_write from rpi_touchscreen_probe
fails before mipi_dsi_device_register_full is called, then
in trying to log the error message if uses ts->dsi->dev when
it is still NULL.
Use ts->i2c->dev instead, which is initialised earlier in probe.
Fixes: 2f733d6194
("drm/panel: Add support for the Raspberry Pi 7" Touchscreen.")
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220415162513.42190-2-stefan.wahren@i2se.com
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@ -229,7 +229,7 @@ static void rpi_touchscreen_i2c_write(struct rpi_touchscreen *ts,
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ret = i2c_smbus_write_byte_data(ts->i2c, reg, val);
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if (ret)
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dev_err(&ts->dsi->dev, "I2C write failed: %d\n", ret);
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dev_err(&ts->i2c->dev, "I2C write failed: %d\n", ret);
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}
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static int rpi_touchscreen_write(struct rpi_touchscreen *ts, u16 reg, u32 val)
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