[media] imon: rate-limit send_packet spew

[cascardo/linux.git] / drivers / media / rc / imon.c

diff --git a/drivers/media/rc/imon.c b/drivers/media/rc/imon.c
index 6bc35ee..caa3e3a 100644 (file)
--- a/drivers/media/rc/imon.c
+++ b/drivers/media/rc/imon.c
@@ -34,6 +34,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
+#include <linux/ratelimit.h>
 
 #include <linux/input.h>
 #include <linux/usb.h>
@@ -516,19 +517,19 @@ static int send_packet(struct imon_context *ictx)
        if (retval) {
                ictx->tx.busy = false;
                smp_rmb(); /* ensure later readers know we're not busy */
-               pr_err("error submitting urb(%d)\n", retval);
+               pr_err_ratelimited("error submitting urb(%d)\n", retval);
        } else {
                /* Wait for transmission to complete (or abort) */
                mutex_unlock(&ictx->lock);
                retval = wait_for_completion_interruptible(
                                &ictx->tx.finished);
                if (retval)
-                       pr_err("task interrupted\n");
+                       pr_err_ratelimited("task interrupted\n");
                mutex_lock(&ictx->lock);
 
                retval = ictx->tx.status;
                if (retval)
-                       pr_err("packet tx failed (%d)\n", retval);
+                       pr_err_ratelimited("packet tx failed (%d)\n", retval);
        }
 
        kfree(control_req);
@@ -830,20 +831,20 @@ static ssize_t vfd_write(struct file *file, const char *buf,
 
        ictx = file->private_data;
        if (!ictx) {
-               pr_err("no context for device\n");
+               pr_err_ratelimited("no context for device\n");
                return -ENODEV;
        }
 
        mutex_lock(&ictx->lock);
 
        if (!ictx->dev_present_intf0) {
-               pr_err("no iMON device present\n");
+               pr_err_ratelimited("no iMON device present\n");
                retval = -ENODEV;
                goto exit;
        }
 
        if (n_bytes <= 0 || n_bytes > 32) {
-               pr_err("invalid payload size\n");
+               pr_err_ratelimited("invalid payload size\n");
                retval = -EINVAL;
                goto exit;
        }
@@ -869,7 +870,7 @@ static ssize_t vfd_write(struct file *file, const char *buf,
 
                retval = send_packet(ictx);
                if (retval) {
-                       pr_err("send packet failed for packet #%d\n", seq / 2);
+                       pr_err_ratelimited("send packet #%d failed\n", seq / 2);
                        goto exit;
                } else {
                        seq += 2;
@@ -883,7 +884,7 @@ static ssize_t vfd_write(struct file *file, const char *buf,
        ictx->usb_tx_buf[7] = (unsigned char) seq;
        retval = send_packet(ictx);
        if (retval)
-               pr_err("send packet failed for packet #%d\n", seq / 2);
+               pr_err_ratelimited("send packet #%d failed\n", seq / 2);
 
 exit:
        mutex_unlock(&ictx->lock);
@@ -912,20 +913,21 @@ static ssize_t lcd_write(struct file *file, const char *buf,
 
        ictx = file->private_data;
        if (!ictx) {
-               pr_err("no context for device\n");
+               pr_err_ratelimited("no context for device\n");
                return -ENODEV;
        }
 
        mutex_lock(&ictx->lock);
 
        if (!ictx->display_supported) {
-               pr_err("no iMON display present\n");
+               pr_err_ratelimited("no iMON display present\n");
                retval = -ENODEV;
                goto exit;
        }
 
        if (n_bytes != 8) {
-               pr_err("invalid payload size: %d (expected 8)\n", (int)n_bytes);
+               pr_err_ratelimited("invalid payload size: %d (expected 8)\n",
+                                  (int)n_bytes);
                retval = -EINVAL;
                goto exit;
        }
@@ -937,7 +939,7 @@ static ssize_t lcd_write(struct file *file, const char *buf,
 
        retval = send_packet(ictx);
        if (retval) {
-               pr_err("send packet failed!\n");
+               pr_err_ratelimited("send packet failed!\n");
                goto exit;
        } else {
                dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",