From: Bjorn Helgaas <helgaas@kernel.org>
To: Andrey Strachuk <strochuk@ispras.ru>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>,
linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org, ldv-project@linuxtesting.org
Subject: Re: [PATCH v2] ACPI/PCI: Remove useless NULL pointer checks
Date: Wed, 20 Jul 2022 15:44:26 -0500 [thread overview]
Message-ID: <20220720204426.GA1655974@bhelgaas> (raw)
In-Reply-To: <20220720094743.471304-1-strochuk@ispras.ru>
On Wed, Jul 20, 2022 at 12:47:43PM +0300, Andrey Strachuk wrote:
> Local variable 'p' is initialized by an address
> of field of acpi_resource, so it does not make
> sense to compare 'p' with NULL.
Rewrap to fill 75 columns, which is the typical width of commit logs.
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
> Signed-off-by: Andrey Strachuk <strochuk@ispras.ru>
> ---
> drivers/acpi/pci_link.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
> index 58647051c948..aa1038b8aec4 100644
> --- a/drivers/acpi/pci_link.c
> +++ b/drivers/acpi/pci_link.c
> @@ -95,7 +95,7 @@ static acpi_status acpi_pci_link_check_possible(struct acpi_resource *resource,
> case ACPI_RESOURCE_TYPE_IRQ:
> {
> struct acpi_resource_irq *p = &resource->data.irq;
> - if (!p || !p->interrupt_count) {
> + if (!p->interrupt_count) {
> acpi_handle_debug(handle,
> "Blank _PRS IRQ resource\n");
> return AE_OK;
> @@ -121,7 +121,7 @@ static acpi_status acpi_pci_link_check_possible(struct acpi_resource *resource,
> {
> struct acpi_resource_extended_irq *p =
> &resource->data.extended_irq;
> - if (!p || !p->interrupt_count) {
> + if (!p->interrupt_count) {
> acpi_handle_debug(handle,
> "Blank _PRS EXT IRQ resource\n");
> return AE_OK;
> @@ -182,7 +182,7 @@ static acpi_status acpi_pci_link_check_current(struct acpi_resource *resource,
> case ACPI_RESOURCE_TYPE_IRQ:
> {
> struct acpi_resource_irq *p = &resource->data.irq;
> - if (!p || !p->interrupt_count) {
> + if (!p->interrupt_count) {
> /*
> * IRQ descriptors may have no IRQ# bits set,
> * particularly those w/ _STA disabled
> @@ -197,7 +197,7 @@ static acpi_status acpi_pci_link_check_current(struct acpi_resource *resource,
> {
> struct acpi_resource_extended_irq *p =
> &resource->data.extended_irq;
> - if (!p || !p->interrupt_count) {
> + if (!p->interrupt_count) {
> /*
> * extended IRQ descriptors must
> * return at least 1 IRQ
> --
> 2.25.1
>
prev parent reply other threads:[~2022-07-20 20:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-20 9:47 [PATCH v2] ACPI/PCI: Remove useless NULL pointer checks Andrey Strachuk
2022-07-20 20:44 ` Bjorn Helgaas [this message]
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