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mtd: rawnand: stm32_fmc2: manage all errors cases at probe time

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This patch defers its probe when the expected reset control is not
yet ready. This patch also handles properly all errors cases at probe
time.

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/1588756279-17289-2-git-send-email-christophe.kerello@st.com
This commit is contained in:
Christophe Kerello 2020-05-06 11:11:10 +02:00 committed by Miquel Raynal
parent d8ef2b73a4
commit 71d1f1d595
1 changed files with 11 additions and 6 deletions
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17
drivers/mtd/nand/raw/stm32_fmc2_nand.c
View file

@ -1967,7 +1967,11 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
}
rstc = devm_reset_control_get(dev, NULL);
if (!IS_ERR(rstc)) {
if (IS_ERR(rstc)) {
ret = PTR_ERR(rstc);
if (ret == -EPROBE_DEFER)
goto err_clk_disable;
} else {
reset_control_assert(rstc);
reset_control_deassert(rstc);
}
@ -1975,7 +1979,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
/* DMA setup */
ret = stm32_fmc2_dma_setup(fmc2);
if (ret)
return ret;
goto err_release_dma;
/* FMC2 init routine */
stm32_fmc2_init(fmc2);
@ -1997,20 +2001,20 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
/* Scan to find existence of the device */
ret = nand_scan(chip, nand->ncs);
if (ret)
goto err_scan;
goto err_release_dma;
ret = mtd_device_register(mtd, NULL, 0);
if (ret)
goto err_device_register;
goto err_nand_cleanup;
platform_set_drvdata(pdev, fmc2);
return 0;
err_device_register:
err_nand_cleanup:
nand_cleanup(chip);
err_scan:
err_release_dma:
if (fmc2->dma_ecc_ch)
dma_release_channel(fmc2->dma_ecc_ch);
if (fmc2->dma_tx_ch)
@ -2021,6 +2025,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
sg_free_table(&fmc2->dma_data_sg);
sg_free_table(&fmc2->dma_ecc_sg);
err_clk_disable:
clk_disable_unprepare(fmc2->clk);
return ret;