[PATCH] xen: xen-pciback: remove DRIVER

Discussion:

[PATCH] xen: xen-pciback: remove DRIVER_ATTR() usage

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Greg KH

2017-07-19 13:00:03 UTC

From: Greg Kroah-Hartman <***@linuxfoundation.org>

It's better to be explicit and use the DRIVER_ATTR_RW() and
DRIVER_ATTR_RO() macros when defining a driver's sysfs file.

Bonus is this fixes up a checkpatch.pl warning.

This is part of a series to drop DRIVER_ATTR() from the tree entirely.

Cc: Boris Ostrovsky <***@oracle.com>
Cc: Juergen Gross <***@suse.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>

---
drivers/xen/xen-pciback/pci_stub.c | 44 ++++++++++++++++---------------------
1 file changed, 20 insertions(+), 24 deletions(-)

--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -1172,8 +1172,8 @@ out:
return err;
}

-static ssize_t pcistub_slot_add(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t new_slot_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func;
int err;
@@ -1189,10 +1189,10 @@ out:
err = count;
return err;
}
-static DRIVER_ATTR(new_slot, S_IWUSR, NULL, pcistub_slot_add);
+static DRIVER_ATTR_WO(new_slot);

-static ssize_t pcistub_slot_remove(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t remove_slot_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func;
int err;
@@ -1208,9 +1208,9 @@ out:
err = count;
return err;
}
-static DRIVER_ATTR(remove_slot, S_IWUSR, NULL, pcistub_slot_remove);
+static DRIVER_ATTR_WO(remove_slot);

-static ssize_t pcistub_slot_show(struct device_driver *drv, char *buf)
+static ssize_t slots_show(struct device_driver *drv, char *buf)
{
struct pcistub_device_id *pci_dev_id;
size_t count = 0;
@@ -1231,9 +1231,9 @@ static ssize_t pcistub_slot_show(struct

return count;
}
-static DRIVER_ATTR(slots, S_IRUSR, pcistub_slot_show, NULL);
+static DRIVER_ATTR_RO(slots);

-static ssize_t pcistub_irq_handler_show(struct device_driver *drv, char *buf)
+static ssize_t irq_handlers_show(struct device_driver *drv, char *buf)
{
struct pcistub_device *psdev;
struct xen_pcibk_dev_data *dev_data;
@@ -1260,11 +1260,10 @@ static ssize_t pcistub_irq_handler_show(
spin_unlock_irqrestore(&pcistub_devices_lock, flags);
return count;
}
-static DRIVER_ATTR(irq_handlers, S_IRUSR, pcistub_irq_handler_show, NULL);
+static DRIVER_ATTR_RO(irq_handlers);

-static ssize_t pcistub_irq_handler_switch(struct device_driver *drv,
- const char *buf,
- size_t count)
+static ssize_t irq_handler_state_store(struct device_driver *drv,
+ const char *buf, size_t count)
{
struct pcistub_device *psdev;
struct xen_pcibk_dev_data *dev_data;
@@ -1301,11 +1300,10 @@ out:
err = count;
return err;
}
-static DRIVER_ATTR(irq_handler_state, S_IWUSR, NULL,
- pcistub_irq_handler_switch);
+static DRIVER_ATTR_WO(irq_handler_state);

-static ssize_t pcistub_quirk_add(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t quirks_add(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func, reg, size, mask;
int err;
@@ -1323,7 +1321,7 @@ out:
return err;
}

-static ssize_t pcistub_quirk_show(struct device_driver *drv, char *buf)
+static ssize_t quirks_show(struct device_driver *drv, char *buf)
{
int count = 0;
unsigned long flags;
@@ -1366,11 +1364,10 @@ out:

return count;
}
-static DRIVER_ATTR(quirks, S_IRUSR | S_IWUSR, pcistub_quirk_show,
- pcistub_quirk_add);
+static DRIVER_ATTR_RW(quirks);

-static ssize_t permissive_add(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t permissive_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func;
int err;
@@ -1431,8 +1428,7 @@ static ssize_t permissive_show(struct de
spin_unlock_irqrestore(&pcistub_devices_lock, flags);
return count;
}
-static DRIVER_ATTR(permissive, S_IRUSR | S_IWUSR, permissive_show,
- permissive_add);
+static DRIVER_ATTR_RW(permissive);

static void pcistub_exit(void)
{

Juergen Gross

2017-07-19 13:20:02 UTC

Permalink

Post by Greg KH
It's better to be explicit and use the DRIVER_ATTR_RW() and
DRIVER_ATTR_RO() macros when defining a driver's sysfs file.
Bonus is this fixes up a checkpatch.pl warning.
This is part of a series to drop DRIVER_ATTR() from the tree entirely.
---
drivers/xen/xen-pciback/pci_stub.c | 44 ++++++++++++++++---------------------
1 file changed, 20 insertions(+), 24 deletions(-)
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
return err;
}
-static ssize_t pcistub_slot_add(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t new_slot_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func;
int err;
err = count;
return err;
}
-static DRIVER_ATTR(new_slot, S_IWUSR, NULL, pcistub_slot_add);
+static DRIVER_ATTR_WO(new_slot);
-static ssize_t pcistub_slot_remove(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t remove_slot_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func;
int err;
err = count;
return err;
}
-static DRIVER_ATTR(remove_slot, S_IWUSR, NULL, pcistub_slot_remove);
+static DRIVER_ATTR_WO(remove_slot);
-static ssize_t pcistub_slot_show(struct device_driver *drv, char *buf)
+static ssize_t slots_show(struct device_driver *drv, char *buf)
{
struct pcistub_device_id *pci_dev_id;
size_t count = 0;
@@ -1231,9 +1231,9 @@ static ssize_t pcistub_slot_show(struct
return count;
}
-static DRIVER_ATTR(slots, S_IRUSR, pcistub_slot_show, NULL);
+static DRIVER_ATTR_RO(slots);
-static ssize_t pcistub_irq_handler_show(struct device_driver *drv, char *buf)
+static ssize_t irq_handlers_show(struct device_driver *drv, char *buf)
{
struct pcistub_device *psdev;
struct xen_pcibk_dev_data *dev_data;
@@ -1260,11 +1260,10 @@ static ssize_t pcistub_irq_handler_show(
spin_unlock_irqrestore(&pcistub_devices_lock, flags);
return count;
}
-static DRIVER_ATTR(irq_handlers, S_IRUSR, pcistub_irq_handler_show, NULL);
+static DRIVER_ATTR_RO(irq_handlers);
-static ssize_t pcistub_irq_handler_switch(struct device_driver *drv,
- const char *buf,
- size_t count)
+static ssize_t irq_handler_state_store(struct device_driver *drv,
+ const char *buf, size_t count)
{
struct pcistub_device *psdev;
struct xen_pcibk_dev_data *dev_data;
err = count;
return err;
}
-static DRIVER_ATTR(irq_handler_state, S_IWUSR, NULL,
- pcistub_irq_handler_switch);
+static DRIVER_ATTR_WO(irq_handler_state);
-static ssize_t pcistub_quirk_add(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t quirks_add(struct device_driver *drv, const char *buf,
+ size_t count)

Shouldn't this be named quirks_store()?

Juergen

Greg KH

2017-07-19 14:30:02 UTC

Permalink

Post by Juergen Gross

Shouldn't this be named quirks_store()?

Odd, yes, it should, I don't know how my build-testing didn't catch
that, sorry.

Let me go make a v2...

thanks,

greg k-h

Greg KH

2017-07-19 14:50:02 UTC

Permalink

From: Greg Kroah-Hartman <***@linuxfoundation.org>

It's better to be explicit and use the DRIVER_ATTR_RW() and
DRIVER_ATTR_RO() macros when defining a driver's sysfs file.

Bonus is this fixes up a checkpatch.pl warning.

This is part of a series to drop DRIVER_ATTR() from the tree entirely.

Cc: Boris Ostrovsky <***@oracle.com>
Cc: Juergen Gross <***@suse.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
---
v2: fix build error (quirks_store was wrong), thanks to Juergen for the
catch, it's now correctly build tested locally...

drivers/xen/xen-pciback/pci_stub.c | 44 ++++++++++++++++---------------------
1 file changed, 20 insertions(+), 24 deletions(-)

--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -1172,8 +1172,8 @@ out:
return err;
}

-static ssize_t pcistub_slot_add(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t new_slot_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func;
int err;
@@ -1189,10 +1189,10 @@ out:
err = count;
return err;
}
-static DRIVER_ATTR(new_slot, S_IWUSR, NULL, pcistub_slot_add);
+static DRIVER_ATTR_WO(new_slot);

-static ssize_t pcistub_slot_remove(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t remove_slot_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func;
int err;
@@ -1208,9 +1208,9 @@ out:
err = count;
return err;
}
-static DRIVER_ATTR(remove_slot, S_IWUSR, NULL, pcistub_slot_remove);
+static DRIVER_ATTR_WO(remove_slot);

-static ssize_t pcistub_slot_show(struct device_driver *drv, char *buf)
+static ssize_t slots_show(struct device_driver *drv, char *buf)
{
struct pcistub_device_id *pci_dev_id;
size_t count = 0;
@@ -1231,9 +1231,9 @@ static ssize_t pcistub_slot_show(struct

return count;
}
-static DRIVER_ATTR(slots, S_IRUSR, pcistub_slot_show, NULL);
+static DRIVER_ATTR_RO(slots);

-static ssize_t pcistub_irq_handler_show(struct device_driver *drv, char *buf)
+static ssize_t irq_handlers_show(struct device_driver *drv, char *buf)
{
struct pcistub_device *psdev;
struct xen_pcibk_dev_data *dev_data;
@@ -1260,11 +1260,10 @@ static ssize_t pcistub_irq_handler_show(
spin_unlock_irqrestore(&pcistub_devices_lock, flags);
return count;
}
-static DRIVER_ATTR(irq_handlers, S_IRUSR, pcistub_irq_handler_show, NULL);
+static DRIVER_ATTR_RO(irq_handlers);

-static ssize_t pcistub_irq_handler_switch(struct device_driver *drv,
- const char *buf,
- size_t count)
+static ssize_t irq_handler_state_store(struct device_driver *drv,
+ const char *buf, size_t count)
{
struct pcistub_device *psdev;
struct xen_pcibk_dev_data *dev_data;
@@ -1301,11 +1300,10 @@ out:
err = count;
return err;
}
-static DRIVER_ATTR(irq_handler_state, S_IWUSR, NULL,
- pcistub_irq_handler_switch);
+static DRIVER_ATTR_WO(irq_handler_state);

-static ssize_t pcistub_quirk_add(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t quirks_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func, reg, size, mask;
int err;
@@ -1323,7 +1321,7 @@ out:
return err;
}

-static ssize_t pcistub_quirk_show(struct device_driver *drv, char *buf)
+static ssize_t quirks_show(struct device_driver *drv, char *buf)
{
int count = 0;
unsigned long flags;
@@ -1366,11 +1364,10 @@ out:

return count;
}
-static DRIVER_ATTR(quirks, S_IRUSR | S_IWUSR, pcistub_quirk_show,
- pcistub_quirk_add);
+static DRIVER_ATTR_RW(quirks);

-static ssize_t permissive_add(struct device_driver *drv, const char *buf,
- size_t count)
+static ssize_t permissive_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
int domain, bus, slot, func;
int err;
@@ -1431,8 +1428,7 @@ static ssize_t permissive_show(struct de
spin_unlock_irqrestore(&pcistub_devices_lock, flags);
return count;
}
-static DRIVER_ATTR(permissive, S_IRUSR | S_IWUSR, permissive_show,
- permissive_add);
+static DRIVER_ATTR_RW(permissive);

static void pcistub_exit(void)
{

Juergen Gross

2017-07-19 15:00:02 UTC

Permalink

Reviewed-by: Juergen Gross <***@suse.com>

I'll take this through the Xen tree, unless you want to use your tree.

Thanks,

Juergen

Greg KH

2017-07-19 15:20:02 UTC

Permalink

Post by Juergen Gross

I'll take this through the Xen tree, unless you want to use your tree.

If I can take it through mine, then I could drop DRIVER_ATTR() from the
whole tree for the next kernel release, which would be ideal.

But if you want to take it, that's fine, I can wait another release, no
rush.

thanks,

greg k-h

Juergen Gross

2017-07-19 17:30:02 UTC

Permalink

Post by Greg KH

Post by Juergen Gross

I'll take this through the Xen tree, unless you want to use your tree.

If I can take it through mine, then I could drop DRIVER_ATTR() from the
whole tree for the next kernel release, which would be ideal.
But if you want to take it, that's fine, I can wait another release, no
rush.

In this case just use your tree. I don't think there are any pending
conflicting patches right now.

Juergen