[PATCH -next V3 2/2] sata_fsl: fix warning in remove_proc_entry when rmmod sata_fsl

From: Baokun Li
Date: Sun Nov 21 2021 - 22:33:21 EST

Trying to remove the fsl-sata module in the PPC64 GNU/Linux
leads to the following warning:
------------[ cut here ]------------
remove_proc_entry: removing non-empty directory 'irq/69',
leaking at least 'fsl-sata[ff0221000.sata]'
WARNING: CPU: 3 PID: 1048 at fs/proc/generic.c:722
NIP [c00000000033826c] .remove_proc_entry+0x20c/0x220
LR [c000000000338268] .remove_proc_entry+0x208/0x220
Call Trace:
.remove_proc_entry+0x208/0x220 (unreliable)
.sata_fsl_remove+0x58/0xa0 [sata_fsl]
.fsl_sata_driver_exit+0x18/0xa20 [sata_fsl]
---[ end trace 0ea876d4076908f5 ]---

The driver creates the mapping by calling irq_of_parse_and_map(),
so it also has to dispose the mapping. But the easy way out is to
simply use platform_get_irq() instead of irq_of_parse_map(). Also
we should adapt return value checking and propagate error values.

In this case the mapping is not managed by the device but by
the of core, so the device has not to dispose the mapping.

Fixes: faf0b2e5afe7 ("drivers/ata: add support to Freescale 3.0Gbps SATA Controller")
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Baokun Li <libaokun1@xxxxxxxxxx>
Adapt return value checking and propagate error values.
Add fixed and CC stable.

drivers/ata/sata_fsl.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index 30759fd1c3a2..f850dfab72a6 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -1493,8 +1493,9 @@ static int sata_fsl_probe(struct platform_device *ofdev)
host_priv->ssr_base = ssr_base;
host_priv->csr_base = csr_base;

- irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
- if (!irq) {
+ irq = platform_get_irq(ofdev, 0);
+ if (irq < 0) {
+ retval = irq;
dev_err(&ofdev->dev, "invalid irq from platform\n");
goto error_exit_with_cleanup;
@@ -1570,8 +1571,6 @@ static int sata_fsl_remove(struct platform_device *ofdev)


- irq_dispose_mapping(host_priv->irq);
return 0;