target/linux/mediatek/patches-5.15/848-v5.19-i2c-mediatek-Fix-an-error-handling-path-in-mtk_i2c_p.patch

   1 From 6f3a5814c7aaea4176e0ac8b1ec6dc0a65aa2808 Mon Sep 17 00:00:00 2001
   2 From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
   3 Date: Sun, 22 May 2022 14:22:07 +0200
   4 Subject: [PATCH 09/16] i2c: mediatek: Fix an error handling path in
   5  mtk_i2c_probe()
   6
   7 The clsk are prepared, enabled, then disabled. So if an error occurs after
   8 the disable step, they are still prepared.
   9
  10 Add an error handling path to unprepare the clks in such a case, as already
  11 done in the .remove function.
  12
  13 Fixes: 8b4fc246c3ff ("i2c: mediatek: Optimize master_xfer() and avoid circular locking")
  14 Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
  15 Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
  16 Reviewed-by: Qii Wang <qii.wang@mediatek.com>
  17 Signed-off-by: Wolfram Sang <wsa@kernel.org>
  18 ---
  19  drivers/i2c/busses/i2c-mt65xx.c | 9 +++++++--
  20  1 file changed, 7 insertions(+), 2 deletions(-)
  21
  22 --- a/drivers/i2c/busses/i2c-mt65xx.c
  23 +++ b/drivers/i2c/busses/i2c-mt65xx.c
  24 @@ -1420,17 +1420,22 @@ static int mtk_i2c_probe(struct platform
  25         if (ret < 0) {
  26                 dev_err(&pdev->dev,
  27                         "Request I2C IRQ %d fail\n", irq);
  28 -               return ret;
  29 +               goto err_bulk_unprepare;
  30         }
  31
  32         i2c_set_adapdata(&i2c->adap, i2c);
  33         ret = i2c_add_adapter(&i2c->adap);
  34         if (ret)
  35 -               return ret;
  36 +               goto err_bulk_unprepare;
  37
  38         platform_set_drvdata(pdev, i2c);
  39
  40         return 0;
  41 +
  42 +err_bulk_unprepare:
  43 +       clk_bulk_unprepare(I2C_MT65XX_CLK_MAX, i2c->clocks);
  44 +
  45 +       return ret;
  46  }
  47
  48  static int mtk_i2c_remove(struct platform_device *pdev)