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mmc: pxamci: Simplify pxamci_probe() error handling using devm APIs

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This patch refactors pxamci_probe() to use devm-managed resource
allocation (e.g. devm_dma_request_chan) and dev_err_probe() for
improved readability and automatic cleanup on probe failure.

It also removes redundant NULL assignments and manual resource release
logic from pxamci_probe(), and eliminates the corresponding release
calls from pxamci_remove().

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202510041841.pRlunIfl-lkp@intel.com/
Fixes: 58c40f3faf ("mmc: pxamci: Use devm_mmc_alloc_host() helper")
Suggested-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Rakuram Eswaran <rakuram.e96@gmail.com>
Reviewed-by: Khalid Aziz <khalid@kernel.org>
Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Rakuram Eswaran
2025-10-23 20:24:32 +05:30
committed by Ulf Hansson
parent a28352cf2d
commit 9e80562521
1 changed files with 18 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/mmc/host/pxamci.c
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@@ -652,10 +652,9 @@ static int pxamci_probe(struct platform_device *pdev)
host->clkrt = CLKRT_OFF;
host->clk = devm_clk_get(dev, NULL);
if (IS_ERR(host->clk)) {
host->clk = NULL;
return PTR_ERR(host->clk);
}
if (IS_ERR(host->clk))
return dev_err_probe(dev, PTR_ERR(host->clk),
"Failed to acquire clock\n");
host->clkrate = clk_get_rate(host->clk);
@@ -703,46 +702,37 @@ static int pxamci_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mmc);
host->dma_chan_rx = dma_request_chan(dev, "rx");
if (IS_ERR(host->dma_chan_rx)) {
host->dma_chan_rx = NULL;
host->dma_chan_rx = devm_dma_request_chan(dev, "rx");
if (IS_ERR(host->dma_chan_rx))
return dev_err_probe(dev, PTR_ERR(host->dma_chan_rx),
"unable to request rx dma channel\n");
}
host->dma_chan_tx = dma_request_chan(dev, "tx");
if (IS_ERR(host->dma_chan_tx)) {
dev_err(dev, "unable to request tx dma channel\n");
ret = PTR_ERR(host->dma_chan_tx);
host->dma_chan_tx = NULL;
goto out;
}
host->dma_chan_tx = devm_dma_request_chan(dev, "tx");
if (IS_ERR(host->dma_chan_tx))
return dev_err_probe(dev, PTR_ERR(host->dma_chan_tx),
"unable to request tx dma channel\n");
if (host->pdata) {
host->detect_delay_ms = host->pdata->detect_delay_ms;
host->power = devm_gpiod_get_optional(dev, "power", GPIOD_OUT_LOW);
if (IS_ERR(host->power)) {
ret = PTR_ERR(host->power);
dev_err(dev, "Failed requesting gpio_power\n");
goto out;
}
if (IS_ERR(host->power))
return dev_err_probe(dev, PTR_ERR(host->power),
"Failed requesting gpio_power\n");
/* FIXME: should we pass detection delay to debounce? */
ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0);
if (ret && ret != -ENOENT) {
dev_err(dev, "Failed requesting gpio_cd\n");
goto out;
}
if (ret && ret != -ENOENT)
return dev_err_probe(dev, ret, "Failed requesting gpio_cd\n");
if (!host->pdata->gpio_card_ro_invert)
mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
ret = mmc_gpiod_request_ro(mmc, "wp", 0, 0);
if (ret && ret != -ENOENT) {
dev_err(dev, "Failed requesting gpio_ro\n");
goto out;
}
if (ret && ret != -ENOENT)
return dev_err_probe(dev, ret, "Failed requesting gpio_ro\n");
if (!ret)
host->use_ro_gpio = true;
@@ -759,16 +749,8 @@ static int pxamci_probe(struct platform_device *pdev)
if (ret) {
if (host->pdata && host->pdata->exit)
host->pdata->exit(dev, mmc);
goto out;
}
return 0;
out:
if (host->dma_chan_rx)
dma_release_channel(host->dma_chan_rx);
if (host->dma_chan_tx)
dma_release_channel(host->dma_chan_tx);
return ret;
}
@@ -791,8 +773,6 @@ static void pxamci_remove(struct platform_device *pdev)
dmaengine_terminate_all(host->dma_chan_rx);
dmaengine_terminate_all(host->dma_chan_tx);
dma_release_channel(host->dma_chan_rx);
dma_release_channel(host->dma_chan_tx);
}
}