* [PATCH] usb: usbtest: reduce stack usage in test_queue
@ 2020-07-16 8:27 Bixuan Cui
2020-07-16 13:47 ` [PATCH -next v2] " Bixuan Cui
0 siblings, 1 reply; 7+ messages in thread
From: Bixuan Cui @ 2020-07-16 8:27 UTC (permalink / raw)
To: linux-next
Cc: linux-kernel, linux-usb, gustavoars, qiang.zhang, stern, gregkh,
cuibixuan
Fix the warning: [-Werror=-Wframe-larger-than=]
drivers/usb/misc/usbtest.c: In function 'test_queue':
drivers/usb/misc/usbtest.c:2148:1:
warning: the frame size of 1232 bytes is larger than 1024 bytes
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
---
drivers/usb/misc/usbtest.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 8b220d56647b..a9b40953d6bc 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -2043,7 +2043,7 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
unsigned i;
unsigned long packets = 0;
int status = 0;
- struct urb *urbs[MAX_SGLEN];
+ struct urb **urbs;
if (!param->sglen || param->iterations > UINT_MAX / param->sglen)
return -EINVAL;
@@ -2051,6 +2051,10 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
if (param->sglen > MAX_SGLEN)
return -EINVAL;
+ urbs = kcalloc(MAX_SGLEN, sizeof(*urbs), GFP_KERNEL);
+ if (!urbs)
+ return -ENOMEM;
+
memset(&context, 0, sizeof(context));
context.count = param->iterations * param->sglen;
context.dev = dev;
@@ -2137,6 +2141,8 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
else if (context.errors >
(context.is_iso ? context.packet_count / 10 : 0))
status = -EIO;
+
+ kfree(urbs);
return status;
fail:
@@ -2144,6 +2150,8 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
if (urbs[i])
simple_free_urb(urbs[i]);
}
+
+ kfree(urbs);
return status;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH -next v2] usb: usbtest: reduce stack usage in test_queue
2020-07-16 8:27 [PATCH] usb: usbtest: reduce stack usage in test_queue Bixuan Cui
@ 2020-07-16 13:47 ` Bixuan Cui
2020-07-16 14:26 ` Greg KH
2020-07-16 15:45 ` Alan Stern
0 siblings, 2 replies; 7+ messages in thread
From: Bixuan Cui @ 2020-07-16 13:47 UTC (permalink / raw)
To: linux-next, gustavoars, stern, gregkh
Cc: linux-kernel, linux-usb, qiang.zhang, Wanghui (John)
Fix the warning: [-Werror=-Wframe-larger-than=]
drivers/usb/misc/usbtest.c: In function 'test_queue':
drivers/usb/misc/usbtest.c:2148:1:
warning: the frame size of 1232 bytes is larger than 1024 bytes
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
---
drivers/usb/misc/usbtest.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 8b220d56647b..a9b40953d6bc 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -2043,7 +2043,7 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
unsigned i;
unsigned long packets = 0;
int status = 0;
- struct urb *urbs[MAX_SGLEN];
+ struct urb **urbs;
if (!param->sglen || param->iterations > UINT_MAX / param->sglen)
return -EINVAL;
@@ -2051,6 +2051,10 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
if (param->sglen > MAX_SGLEN)
return -EINVAL;
+ urbs = kcalloc(MAX_SGLEN, sizeof(*urbs), GFP_KERNEL);
+ if (!urbs)
+ return -ENOMEM;
+
memset(&context, 0, sizeof(context));
context.count = param->iterations * param->sglen;
context.dev = dev;
@@ -2137,6 +2141,8 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
else if (context.errors >
(context.is_iso ? context.packet_count / 10 : 0))
status = -EIO;
+
+ kfree(urbs);
return status;
fail:
@@ -2144,6 +2150,8 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
if (urbs[i])
simple_free_urb(urbs[i]);
}
+
+ kfree(urbs);
return status;
}
--
2.17.1
.
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH -next v2] usb: usbtest: reduce stack usage in test_queue
2020-07-16 13:47 ` [PATCH -next v2] " Bixuan Cui
@ 2020-07-16 14:26 ` Greg KH
2020-07-17 0:25 ` Bixuan Cui
2020-07-16 15:45 ` Alan Stern
1 sibling, 1 reply; 7+ messages in thread
From: Greg KH @ 2020-07-16 14:26 UTC (permalink / raw)
To: Bixuan Cui
Cc: linux-next, gustavoars, stern, linux-kernel, linux-usb,
qiang.zhang, Wanghui (John)
On Thu, Jul 16, 2020 at 09:47:10PM +0800, Bixuan Cui wrote:
> Fix the warning: [-Werror=-Wframe-larger-than=]
>
> drivers/usb/misc/usbtest.c: In function 'test_queue':
> drivers/usb/misc/usbtest.c:2148:1:
> warning: the frame size of 1232 bytes is larger than 1024 bytes
>
> Reported-by: kbuild test robot <lkp@intel.com>
> Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
> ---
> drivers/usb/misc/usbtest.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
What changed from v1? Always put that below the --- line.
Please fix up and resend a v2.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH -next v2] usb: usbtest: reduce stack usage in test_queue
2020-07-16 14:26 ` Greg KH
@ 2020-07-17 0:25 ` Bixuan Cui
0 siblings, 0 replies; 7+ messages in thread
From: Bixuan Cui @ 2020-07-17 0:25 UTC (permalink / raw)
To: Greg KH
Cc: linux-next, gustavoars, stern, linux-kernel, linux-usb,
qiang.zhang, Wanghui (John)
On 2020/7/16 22:26, Greg KH wrote:
>> Reported-by: kbuild test robot <lkp@intel.com>
>> Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
>> ---
>> drivers/usb/misc/usbtest.c | 10 +++++++++-
>> 1 file changed, 9 insertions(+), 1 deletion(-)
> What changed from v1? Always put that below the --- line.
>
> Please fix up and resend a v2.
Thank you,it's my mistake. I resend a v2.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH -next v2] usb: usbtest: reduce stack usage in test_queue
2020-07-16 13:47 ` [PATCH -next v2] " Bixuan Cui
2020-07-16 14:26 ` Greg KH
@ 2020-07-16 15:45 ` Alan Stern
2020-07-17 0:22 ` Bixuan Cui
2020-07-17 0:22 ` Bixuan Cui
1 sibling, 2 replies; 7+ messages in thread
From: Alan Stern @ 2020-07-16 15:45 UTC (permalink / raw)
To: Bixuan Cui
Cc: linux-next, gustavoars, gregkh, linux-kernel, linux-usb,
qiang.zhang, Wanghui (John)
On Thu, Jul 16, 2020 at 09:47:10PM +0800, Bixuan Cui wrote:
> Fix the warning: [-Werror=-Wframe-larger-than=]
>
> drivers/usb/misc/usbtest.c: In function 'test_queue':
> drivers/usb/misc/usbtest.c:2148:1:
> warning: the frame size of 1232 bytes is larger than 1024 bytes
>
> Reported-by: kbuild test robot <lkp@intel.com>
> Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
> ---
> drivers/usb/misc/usbtest.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
> index 8b220d56647b..a9b40953d6bc 100644
> --- a/drivers/usb/misc/usbtest.c
> +++ b/drivers/usb/misc/usbtest.c
> @@ -2043,7 +2043,7 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
> unsigned i;
> unsigned long packets = 0;
> int status = 0;
> - struct urb *urbs[MAX_SGLEN];
> + struct urb **urbs;
>
> if (!param->sglen || param->iterations > UINT_MAX / param->sglen)
> return -EINVAL;
> @@ -2051,6 +2051,10 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
> if (param->sglen > MAX_SGLEN)
> return -EINVAL;
>
> + urbs = kcalloc(MAX_SGLEN, sizeof(*urbs), GFP_KERNEL);
Since you know at runtime how many URBs will be needed, why not use that
information? Change MAX_SGLEN to param->sglen.
Aside from that,
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Alan Stern
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH -next v2] usb: usbtest: reduce stack usage in test_queue
2020-07-16 15:45 ` Alan Stern
@ 2020-07-17 0:22 ` Bixuan Cui
2020-07-17 0:22 ` Bixuan Cui
1 sibling, 0 replies; 7+ messages in thread
From: Bixuan Cui @ 2020-07-17 0:22 UTC (permalink / raw)
To: Alan Stern
Cc: linux-next, gustavoars, gregkh, linux-kernel, linux-usb,
qiang.zhang, Wanghui (John)
Fix the warning: [-Werror=-Wframe-larger-than=]
drivers/usb/misc/usbtest.c: In function 'test_queue':
drivers/usb/misc/usbtest.c:2148:1:
warning: the frame size of 1232 bytes is larger than 1024 bytes
Reported-by: kbuild test robot <lkp@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
---
v2: Change MAX_SGLEN to param->sglen.
drivers/usb/misc/usbtest.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 8b220d56647b..150090ee4ec1 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -2043,7 +2043,7 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
unsigned i;
unsigned long packets = 0;
int status = 0;
- struct urb *urbs[MAX_SGLEN];
+ struct urb **urbs;
if (!param->sglen || param->iterations > UINT_MAX / param->sglen)
return -EINVAL;
@@ -2051,6 +2051,10 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
if (param->sglen > MAX_SGLEN)
return -EINVAL;
+ urbs = kcalloc(param->sglen, sizeof(*urbs), GFP_KERNEL);
+ if (!urbs)
+ return -ENOMEM;
+
memset(&context, 0, sizeof(context));
context.count = param->iterations * param->sglen;
context.dev = dev;
@@ -2137,6 +2141,8 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
else if (context.errors >
(context.is_iso ? context.packet_count / 10 : 0))
status = -EIO;
+
+ kfree(urbs);
return status;
fail:
@@ -2144,6 +2150,8 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
if (urbs[i])
simple_free_urb(urbs[i]);
}
+
+ kfree(urbs);
return status;
}
--
2.17.1
.
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH -next v2] usb: usbtest: reduce stack usage in test_queue
2020-07-16 15:45 ` Alan Stern
2020-07-17 0:22 ` Bixuan Cui
@ 2020-07-17 0:22 ` Bixuan Cui
1 sibling, 0 replies; 7+ messages in thread
From: Bixuan Cui @ 2020-07-17 0:22 UTC (permalink / raw)
To: Alan Stern
Cc: linux-next, gustavoars, gregkh, linux-kernel, linux-usb,
qiang.zhang, Wanghui (John)
Fix the warning: [-Werror=-Wframe-larger-than=]
drivers/usb/misc/usbtest.c: In function 'test_queue':
drivers/usb/misc/usbtest.c:2148:1:
warning: the frame size of 1232 bytes is larger than 1024 bytes
Reported-by: kbuild test robot <lkp@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
---
v2: Change MAX_SGLEN to param->sglen.
drivers/usb/misc/usbtest.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 8b220d56647b..150090ee4ec1 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -2043,7 +2043,7 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
unsigned i;
unsigned long packets = 0;
int status = 0;
- struct urb *urbs[MAX_SGLEN];
+ struct urb **urbs;
if (!param->sglen || param->iterations > UINT_MAX / param->sglen)
return -EINVAL;
@@ -2051,6 +2051,10 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
if (param->sglen > MAX_SGLEN)
return -EINVAL;
+ urbs = kcalloc(param->sglen, sizeof(*urbs), GFP_KERNEL);
+ if (!urbs)
+ return -ENOMEM;
+
memset(&context, 0, sizeof(context));
context.count = param->iterations * param->sglen;
context.dev = dev;
@@ -2137,6 +2141,8 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
else if (context.errors >
(context.is_iso ? context.packet_count / 10 : 0))
status = -EIO;
+
+ kfree(urbs);
return status;
fail:
@@ -2144,6 +2150,8 @@ test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
if (urbs[i])
simple_free_urb(urbs[i]);
}
+
+ kfree(urbs);
return status;
}
--
2.17.1
.
^ permalink raw reply related [flat|nested] 7+ messages in thread
end of thread, other threads:[~2020-07-17 0:25 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2020-07-16 8:27 [PATCH] usb: usbtest: reduce stack usage in test_queue Bixuan Cui
2020-07-16 13:47 ` [PATCH -next v2] " Bixuan Cui
2020-07-16 14:26 ` Greg KH
2020-07-17 0:25 ` Bixuan Cui
2020-07-16 15:45 ` Alan Stern
2020-07-17 0:22 ` Bixuan Cui
2020-07-17 0:22 ` Bixuan Cui
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