From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mathias Nyman <mathias.nyman@linux.intel.com>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Mathias Nyman <mathias.nyman@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH v1 03/10] xhci: dbc: Use sysfs_emit() to instead of scnprintf()
Date: Mon, 2 Oct 2023 19:16:03 +0300 [thread overview]
Message-ID: <20231002161610.2648818-3-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20231002161610.2648818-1-andriy.shevchenko@linux.intel.com>
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>
---
drivers/usb/host/xhci-dbgcap.c | 43 +++++++++++++---------------------
drivers/usb/host/xhci-dbgcap.h | 1 +
2 files changed, 17 insertions(+), 27 deletions(-)
diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c
index f505b79afe53..92869c67a430 100644
--- a/drivers/usb/host/xhci-dbgcap.c
+++ b/drivers/usb/host/xhci-dbgcap.c
@@ -910,6 +910,15 @@ 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)
@@ -921,30 +930,10 @@ static ssize_t dbc_show(struct device *dev,
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 +966,7 @@ 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 +1006,7 @@ 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 +1045,7 @@ 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 +1085,7 @@ 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,
diff --git a/drivers/usb/host/xhci-dbgcap.h b/drivers/usb/host/xhci-dbgcap.h
index 51a7ab3ba0ca..e39e3ae1677a 100644
--- a/drivers/usb/host/xhci-dbgcap.h
+++ b/drivers/usb/host/xhci-dbgcap.h
@@ -82,6 +82,7 @@ enum dbc_state {
DS_CONNECTED,
DS_CONFIGURED,
DS_STALLED,
+ DS_MAX
};
struct dbc_ep {
--
2.40.0.1.gaa8946217a0b
next prev parent reply other threads:[~2023-10-02 16:18 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-02 16:16 [PATCH v1 01/10] xhci: dbc: Drop duplicate checks for dma_free_coherent() Andy Shevchenko
2023-10-02 16:16 ` [PATCH v1 02/10] xhci: dbc: Convert to use sysfs_streq() Andy Shevchenko
2023-10-02 16:16 ` Andy Shevchenko [this message]
2023-10-02 18:03 ` [PATCH v1 03/10] xhci: dbc: Use sysfs_emit() to instead of scnprintf() kernel test robot
2023-10-03 8:50 ` Andy Shevchenko
2023-10-03 12:30 ` Mathias Nyman
2023-10-02 16:16 ` [PATCH v1 04/10] xhci: dbc: Use ATTRIBUTE_GROUPS() Andy Shevchenko
2023-10-11 14:18 ` Mathias Nyman
2023-10-02 16:16 ` [PATCH v1 05/10] xhci: dbc: Check for errors first in xhci_dbc_stop() Andy Shevchenko
2023-10-02 16:16 ` [PATCH v1 06/10] xhci: dbc: Don't shadow error codes in store() functions Andy Shevchenko
2023-10-02 16:16 ` [PATCH v1 07/10] xhci: dbc: Replace custom return value with proper Linux error code Andy Shevchenko
2023-10-02 16:16 ` [PATCH v1 08/10] xhci: dbc: Use sizeof_field() where it makes sense Andy Shevchenko
2023-10-02 16:16 ` [PATCH v1 09/10] xhci: dbc: Use sizeof(*pointer) instead of sizeof(type) Andy Shevchenko
2023-10-02 16:16 ` [PATCH v1 10/10] xhci: dbc: Add missing headers Andy Shevchenko
2023-10-11 14:20 ` Mathias Nyman
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