* Re: [PATCH] mailbox: pcc: Put the PCCT table for error path
@ 2020-07-23 5:33 Markus Elfring
0 siblings, 0 replies; 2+ messages in thread
From: Markus Elfring @ 2020-07-23 5:33 UTC (permalink / raw)
To: Hanjun Guo, Jassi Brar; +Cc: linux-kernel, kernel-janitors
…
> In acpi_pcc_probe(), the PCCT table entries will be used as private
> data for communication chan at runtime, but the table should be put
> for error path.
* An imperative wording can be preferred for the change description,
can't it?
* Will the tag “Fixes” become helpful for the commit message?
Regards,
Markus
^ permalink raw reply [flat|nested] 2+ messages in thread
* [PATCH] mailbox: pcc: Put the PCCT table for error path
@ 2020-07-22 9:40 Hanjun Guo
0 siblings, 0 replies; 2+ messages in thread
From: Hanjun Guo @ 2020-07-22 9:40 UTC (permalink / raw)
To: Jassi Brar; +Cc: linux-kernel, Hanjun Guo
The acpi_get_table() should be coupled with acpi_put_table() if
the mapped table is not used at runtime to release the table
mapping.
In acpi_pcc_probe(), the PCCT table entries will be used as private
data for communication chan at runtime, but the table should be put
for error path.
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
---
drivers/mailbox/pcc.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index 8c7fac3..ef9ecd1 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -457,14 +457,17 @@ static int __init acpi_pcc_probe(void)
pr_warn("Error parsing PCC subspaces from PCCT\n");
else
pr_warn("Invalid PCCT: %d PCC subspaces\n", count);
- return -EINVAL;
+
+ rc = -EINVAL;
+ goto err_put_pcct;
}
pcc_mbox_channels = kcalloc(count, sizeof(struct mbox_chan),
GFP_KERNEL);
if (!pcc_mbox_channels) {
pr_err("Could not allocate space for PCC mbox channels\n");
- return -ENOMEM;
+ rc = -ENOMEM;
+ goto err_put_pcct;
}
pcc_doorbell_vaddr = kcalloc(count, sizeof(void *), GFP_KERNEL);
@@ -535,6 +538,8 @@ static int __init acpi_pcc_probe(void)
kfree(pcc_doorbell_vaddr);
err_free_mbox:
kfree(pcc_mbox_channels);
+err_put_pcct:
+ acpi_put_table(pcct_tbl);
return rc;
}
--
1.7.12.4
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