* [PATCH] usb: xhci: avoid renesas_usb_fw.mem when it's unusable
@ 2021-07-02 5:47 Greg Thelen
2021-07-02 5:56 ` Greg Kroah-Hartman
0 siblings, 1 reply; 4+ messages in thread
From: Greg Thelen @ 2021-07-02 5:47 UTC (permalink / raw)
To: Vinod Koul, Mathias Nyman, Greg Kroah-Hartman
Cc: linux-usb, linux-kernel, Greg Thelen
Commit a66d21d7dba8 ("usb: xhci: Add support for Renesas controller with
memory") added renesas_usb_fw.mem firmware reference to xhci-pci. Thus
modinfo indicates xhci-pci.ko has "firmware: renesas_usb_fw.mem". But
the firmware is only actually used with CONFIG_USB_XHCI_PCI_RENESAS. An
unusable firmware reference can trigger safety checkers which look for
drivers with unmet firmware dependencies.
Avoid referring to renesas_usb_fw.mem in circumstances when it cannot be
loaded (when CONFIG_USB_XHCI_PCI_RENESAS isn't set).
Signed-off-by: Greg Thelen <gthelen@google.com>
---
drivers/usb/host/xhci-pci.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 18c2bbddf080..cb148da7a789 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -618,8 +618,10 @@ static void xhci_pci_shutdown(struct usb_hcd *hcd)
/*-------------------------------------------------------------------------*/
static const struct xhci_driver_data reneses_data = {
+#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
.quirks = XHCI_RENESAS_FW_QUIRK,
.firmware = "renesas_usb_fw.mem",
+#endif
};
/* PCI driver selection metadata; PCI hotplugging uses this */
@@ -636,7 +638,13 @@ static const struct pci_device_id pci_ids[] = {
{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, pci_ids);
+/*
+ * Without CONFIG_USB_XHCI_PCI_RENESAS renesas_xhci_check_request_fw() won't
+ * load firmware, so don't encumber the xhci-pci driver with it.
+ */
+#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
MODULE_FIRMWARE("renesas_usb_fw.mem");
+#endif
/* pci driver glue; this is a "new style" PCI driver module */
static struct pci_driver xhci_pci_driver = {
--
2.32.0.93.g670b81a890-goog
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] usb: xhci: avoid renesas_usb_fw.mem when it's unusable
2021-07-02 5:47 [PATCH] usb: xhci: avoid renesas_usb_fw.mem when it's unusable Greg Thelen
@ 2021-07-02 5:56 ` Greg Kroah-Hartman
2021-07-02 7:11 ` Greg Thelen
0 siblings, 1 reply; 4+ messages in thread
From: Greg Kroah-Hartman @ 2021-07-02 5:56 UTC (permalink / raw)
To: Greg Thelen; +Cc: Vinod Koul, Mathias Nyman, linux-usb, linux-kernel
On Thu, Jul 01, 2021 at 10:47:54PM -0700, Greg Thelen wrote:
> Commit a66d21d7dba8 ("usb: xhci: Add support for Renesas controller with
> memory") added renesas_usb_fw.mem firmware reference to xhci-pci. Thus
> modinfo indicates xhci-pci.ko has "firmware: renesas_usb_fw.mem". But
> the firmware is only actually used with CONFIG_USB_XHCI_PCI_RENESAS. An
> unusable firmware reference can trigger safety checkers which look for
> drivers with unmet firmware dependencies.
>
> Avoid referring to renesas_usb_fw.mem in circumstances when it cannot be
> loaded (when CONFIG_USB_XHCI_PCI_RENESAS isn't set).
>
> Signed-off-by: Greg Thelen <gthelen@google.com>
> ---
> drivers/usb/host/xhci-pci.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> index 18c2bbddf080..cb148da7a789 100644
> --- a/drivers/usb/host/xhci-pci.c
> +++ b/drivers/usb/host/xhci-pci.c
> @@ -618,8 +618,10 @@ static void xhci_pci_shutdown(struct usb_hcd *hcd)
> /*-------------------------------------------------------------------------*/
>
> static const struct xhci_driver_data reneses_data = {
> +#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
If this is not enabled, why is the whole structure needed?
> .quirks = XHCI_RENESAS_FW_QUIRK,
> .firmware = "renesas_usb_fw.mem",
> +#endif
> };
>
> /* PCI driver selection metadata; PCI hotplugging uses this */
> @@ -636,7 +638,13 @@ static const struct pci_device_id pci_ids[] = {
> { /* end: all zeroes */ }
> };
> MODULE_DEVICE_TABLE(pci, pci_ids);
> +/*
> + * Without CONFIG_USB_XHCI_PCI_RENESAS renesas_xhci_check_request_fw() won't
> + * load firmware, so don't encumber the xhci-pci driver with it.
> + */
> +#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
> MODULE_FIRMWARE("renesas_usb_fw.mem");
> +#endif
Why not just have this one chunk, why is the first chunk needed?
And a blank line please before your comment?
And can you add a Fixes: line to the changelog text when you resend?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] usb: xhci: avoid renesas_usb_fw.mem when it's unusable
2021-07-02 5:56 ` Greg Kroah-Hartman
@ 2021-07-02 7:11 ` Greg Thelen
2021-07-02 7:12 ` [PATCH V2] " Greg Thelen
0 siblings, 1 reply; 4+ messages in thread
From: Greg Thelen @ 2021-07-02 7:11 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Vinod Koul, Mathias Nyman, linux-usb, linux-kernel
Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
> On Thu, Jul 01, 2021 at 10:47:54PM -0700, Greg Thelen wrote:
>> Commit a66d21d7dba8 ("usb: xhci: Add support for Renesas controller with
>> memory") added renesas_usb_fw.mem firmware reference to xhci-pci. Thus
>> modinfo indicates xhci-pci.ko has "firmware: renesas_usb_fw.mem". But
>> the firmware is only actually used with CONFIG_USB_XHCI_PCI_RENESAS. An
>> unusable firmware reference can trigger safety checkers which look for
>> drivers with unmet firmware dependencies.
>>
>> Avoid referring to renesas_usb_fw.mem in circumstances when it cannot be
>> loaded (when CONFIG_USB_XHCI_PCI_RENESAS isn't set).
>>
>> Signed-off-by: Greg Thelen <gthelen@google.com>
>> ---
>> drivers/usb/host/xhci-pci.c | 8 ++++++++
>> 1 file changed, 8 insertions(+)
>>
>> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
>> index 18c2bbddf080..cb148da7a789 100644
>> --- a/drivers/usb/host/xhci-pci.c
>> +++ b/drivers/usb/host/xhci-pci.c
>> @@ -618,8 +618,10 @@ static void xhci_pci_shutdown(struct usb_hcd *hcd)
>> /*-------------------------------------------------------------------------*/
>>
>> static const struct xhci_driver_data reneses_data = {
>> +#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
>
> If this is not enabled, why is the whole structure needed?
Removing the struct meant 2 more #if guards needed below to initialize
pci_ids, which exceeded my taste.
>> .quirks = XHCI_RENESAS_FW_QUIRK,
>> .firmware = "renesas_usb_fw.mem",
>> +#endif
>> };
>>
>> /* PCI driver selection metadata; PCI hotplugging uses this */
>> @@ -636,7 +638,13 @@ static const struct pci_device_id pci_ids[] = {
>> { /* end: all zeroes */ }
>> };
>> MODULE_DEVICE_TABLE(pci, pci_ids);
>> +/*
>> + * Without CONFIG_USB_XHCI_PCI_RENESAS renesas_xhci_check_request_fw() won't
>> + * load firmware, so don't encumber the xhci-pci driver with it.
>> + */
>> +#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
>> MODULE_FIRMWARE("renesas_usb_fw.mem");
>> +#endif
>
> Why not just have this one chunk, why is the first chunk needed?
It seemed cleaner to remove both renesas_usb_fw.mem references rather
than leave one unusable one in reneses_data above. But a simpler patch
is appealing, especially given the number of #if guards needed to remove
reneses_data. Patch V2 will just go with this 1-hunk approach.
> And a blank line please before your comment?
Will do.
> And can you add a Fixes: line to the changelog text when you resend?
Will do.
> thanks,
>
> greg k-h
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH V2] usb: xhci: avoid renesas_usb_fw.mem when it's unusable
2021-07-02 7:11 ` Greg Thelen
@ 2021-07-02 7:12 ` Greg Thelen
0 siblings, 0 replies; 4+ messages in thread
From: Greg Thelen @ 2021-07-02 7:12 UTC (permalink / raw)
To: Mathias Nyman, Greg Kroah-Hartman, Vinod Koul
Cc: linux-usb, linux-kernel, Greg Thelen
Commit a66d21d7dba8 ("usb: xhci: Add support for Renesas controller with
memory") added renesas_usb_fw.mem firmware reference to xhci-pci. Thus
modinfo indicates xhci-pci.ko has "firmware: renesas_usb_fw.mem". But
the firmware is only actually used with CONFIG_USB_XHCI_PCI_RENESAS. An
unusable firmware reference can trigger safety checkers which look for
drivers with unmet firmware dependencies.
Avoid referring to renesas_usb_fw.mem in circumstances when it cannot be
loaded (when CONFIG_USB_XHCI_PCI_RENESAS isn't set).
Fixes: a66d21d7dba8 ("usb: xhci: Add support for Renesas controller with memory")
Signed-off-by: Greg Thelen <gthelen@google.com>
---
Changelog since v1:
- Smaller patch, only filters out MODULE_FIRMWARE()
- Added blank line
- Added Fixes footer to commit log
drivers/usb/host/xhci-pci.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 18c2bbddf080..1c9a7957c45c 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -636,7 +636,14 @@ static const struct pci_device_id pci_ids[] = {
{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, pci_ids);
+
+/*
+ * Without CONFIG_USB_XHCI_PCI_RENESAS renesas_xhci_check_request_fw() won't
+ * load firmware, so don't encumber the xhci-pci driver with it.
+ */
+#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
MODULE_FIRMWARE("renesas_usb_fw.mem");
+#endif
/* pci driver glue; this is a "new style" PCI driver module */
static struct pci_driver xhci_pci_driver = {
--
2.32.0.93.g670b81a890-goog
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-07-02 7:12 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-02 5:47 [PATCH] usb: xhci: avoid renesas_usb_fw.mem when it's unusable Greg Thelen
2021-07-02 5:56 ` Greg Kroah-Hartman
2021-07-02 7:11 ` Greg Thelen
2021-07-02 7:12 ` [PATCH V2] " Greg Thelen
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.