On Friday, July 03, 2015 11:56:53 AM Dan Carpenter wrote:
> We should return -ENOMEM if ioremap() fails.
>
> Fixes: 4483d59e29fe ('ACPI / LPSS: check the result of ioremap()')
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
> index 569ee09..10bf5c7 100644
> --- a/drivers/acpi/acpi_lpss.c
> +++ b/drivers/acpi/acpi_lpss.c
> @@ -352,8 +352,10 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
> pdata->mmio_size = resource_size(rentry->res);
> pdata->mmio_base = ioremap(rentry->res->start,
> pdata->mmio_size);
> - if (!pdata->mmio_base)
> + if (!pdata->mmio_base) {
> + ret = -ENOMEM;
> goto err_out;
> + }
> break;
> }
This looks insufficient to my eyes, as we leak memory here too.
What about the following instead?
---
From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Subject: ACPI / LPSS: Fix up acpi_lpss_create_device()
Fix a return value (which should be a negative error code) and a
memory leak (the list allocated by acpi_dev_get_resources() needs
to be freed on ioremap() errors too) in acpi_lpss_create_device()
introduced by commit 4483d59e29fe 'ACPI / LPSS: check the result
of ioremap()'.
Fixes: 4483d59e29fe 'ACPI / LPSS: check the result of ioremap()'
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Cc: 4.0+ <stable@xxxxxxxxxxxxxxx> # 4.0+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/acpi/acpi_lpss.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
Index: linux-pm/drivers/acpi/acpi_lpss.c
===================================================================
--- linux-pm.orig/drivers/acpi/acpi_lpss.c
+++ linux-pm/drivers/acpi/acpi_lpss.c
@@ -352,13 +352,16 @@ static int acpi_lpss_create_device(struc
pdata->mmio_size = resource_size(rentry->res);
pdata->mmio_base = ioremap(rentry->res->start,
pdata->mmio_size);
- if (!pdata->mmio_base)
- goto err_out;
break;
}
acpi_dev_free_resource_list(&resource_list);
+ if (!pdata->mmio_base) {
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
pdata->dev_desc = dev_desc;
if (dev_desc->setup)
--
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