Re: [PATCH v3 03/14] irqchip/csky-mpintc: Fix potential resource leaks

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On 06/24/2020 07:43 PM, Markus Elfring wrote:
There exists potential resource leaks in the error path, fix them.
I suggest to improve this change description.
How do you think about another wording variant?

    Specific system resources were not released in a few error cases.
    Thus add jump targets for the completion of the desired exception handling.

OK, thank you, it looks good to me.
Maybe I can use this description for other patches of this series.



…
+++ b/drivers/irqchip/irq-csky-mpintc.c
@@ -247,8 +247,10 @@ csky_mpintc_init(struct device_node *node, struct device_node *parent)
…
  		INTCG_base = ioremap(mfcr("cr<31, 14>"),
  				     INTCL_SIZE*nr_cpu_ids + INTCG_SIZE);

See also:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst?id=3e08a95294a4fb3702bb3d35ed08028433c37fe6#n257


…
+		if (INTCG_base == NULL) {


Would you like to use the following code variant?

See also:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/scripts/checkpatch.pl?id=3e08a95294a4fb3702bb3d35ed08028433c37fe6#n5756

+		if (!INTCG_base) {


…
@@ -270,12 +274,22 @@ csky_mpintc_init(struct device_node *node, struct device_node *parent)

  #ifdef CONFIG_SMP
  	ipi_irq = irq_create_mapping(root_domain, IPI_IRQ);
+	if (!ipi_irq) {
+		ret = -EIO;
+		goto err_domain_remove;
+	}
…

Can the function call “irq_domain_remove(root_domain)” become relevant
only if the preprocessor symbol “CONFIG_SMP” was defined?

OK, I will do it in the next version.


Regards,
Markus




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