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xhci: dbc: Use sysfs_emit() to instead of scnprintf()

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Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20231201150647.1307406-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2023-12-01 17:06:31 +02:00 committed by Greg Kroah-Hartman
parent 601fbf65b2
commit a230f1a748
2 changed files with 17 additions and 28 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
drivers/usb/host/xhci-dbgcap.c
View file

@ -910,41 +910,29 @@ static void xhci_dbc_handle_events(struct work_struct *work)
mod_delayed_work(system_wq, &dbc->event_work, 1);
}
static const char * const dbc_state_strings[DS_MAX] = {
[DS_DISABLED] = "disabled",
[DS_INITIALIZED] = "initialized",
[DS_ENABLED] = "enabled",
[DS_CONNECTED] = "connected",
[DS_CONFIGURED] = "configured",
[DS_STALLED] = "stalled",
};
static ssize_t dbc_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
const char *p;
struct xhci_dbc *dbc;
struct xhci_hcd *xhci;
xhci = hcd_to_xhci(dev_get_drvdata(dev));
dbc = xhci->dbc;
switch (dbc->state) {
case DS_DISABLED:
p = "disabled";
break;
case DS_INITIALIZED:
p = "initialized";
break;
case DS_ENABLED:
p = "enabled";
break;
case DS_CONNECTED:
p = "connected";
break;
case DS_CONFIGURED:
p = "configured";
break;
case DS_STALLED:
p = "stalled";
break;
default:
p = "unknown";
}
if (dbc->state >= ARRAY_SIZE(dbc_state_strings))
return sysfs_emit(buf, "unknown\n");
return sprintf(buf, "%s\n", p);
return sysfs_emit(buf, "%s\n", dbc_state_strings[dbc->state]);
}
static ssize_t dbc_store(struct device *dev,
@ -977,7 +965,7 @@ static ssize_t dbc_idVendor_show(struct device *dev,
xhci = hcd_to_xhci(dev_get_drvdata(dev));
dbc = xhci->dbc;
return sprintf(buf, "%04x\n", dbc->idVendor);
return sysfs_emit(buf, "%04x\n", dbc->idVendor);
}
static ssize_t dbc_idVendor_store(struct device *dev,
@ -1017,7 +1005,7 @@ static ssize_t dbc_idProduct_show(struct device *dev,
xhci = hcd_to_xhci(dev_get_drvdata(dev));
dbc = xhci->dbc;
return sprintf(buf, "%04x\n", dbc->idProduct);
return sysfs_emit(buf, "%04x\n", dbc->idProduct);
}
static ssize_t dbc_idProduct_store(struct device *dev,
@ -1056,7 +1044,7 @@ static ssize_t dbc_bcdDevice_show(struct device *dev,
xhci = hcd_to_xhci(dev_get_drvdata(dev));
dbc = xhci->dbc;
return sprintf(buf, "%04x\n", dbc->bcdDevice);
return sysfs_emit(buf, "%04x\n", dbc->bcdDevice);
}
static ssize_t dbc_bcdDevice_store(struct device *dev,
@ -1096,7 +1084,7 @@ static ssize_t dbc_bInterfaceProtocol_show(struct device *dev,
xhci = hcd_to_xhci(dev_get_drvdata(dev));
dbc = xhci->dbc;
return sprintf(buf, "%02x\n", dbc->bInterfaceProtocol);
return sysfs_emit(buf, "%02x\n", dbc->bInterfaceProtocol);
}
static ssize_t dbc_bInterfaceProtocol_store(struct device *dev,

1
drivers/usb/host/xhci-dbgcap.h
View file

@ -82,6 +82,7 @@ enum dbc_state {
DS_CONNECTED,
DS_CONFIGURED,
DS_STALLED,
DS_MAX
};
struct dbc_ep {