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authorAndi Kleen <ak@suse.de>2008-01-13 19:41:43 +0300
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-01-23 20:29:27 +0300
commiteaa3e22e8d32bf7a6176f04efad90f4a5aa67f58 (patch)
treee07c69ade8e52ee383f3f169fcc7b7e6b88cca83 /drivers/scsi/sg.c
parentd496f94d22d1491ffb25f4000e85f7a4ecf7f2c4 (diff)
downloadlinux-eaa3e22e8d32bf7a6176f04efad90f4a5aa67f58.tar.xz
[SCSI] sg: Only print SCSI data direction warning once for a command
When I use cdparanoia my logs get spammed a lot by printk: 464 messages suppressed. sg_write: data in/out 30576/30576 bytes for SCSI command 0xbe--guessing data in; program cdparanoia not setting count and/or reply_len properly printk: 1078 messages suppressed. and many more of those. With this patch the message is only printed once for a command in a row. v1->v2: Prevent rate limit messages too (pointed out by jejb) Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Douglas Gilbert <dougg@torque.net> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/sg.c')
-rw-r--r--drivers/scsi/sg.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index f1871ea04045..e65f5d432662 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -602,8 +602,9 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos)
* but is is possible that the app intended SG_DXFER_TO_DEV, because there
* is a non-zero input_size, so emit a warning.
*/
- if (hp->dxfer_direction == SG_DXFER_TO_FROM_DEV)
- if (printk_ratelimit())
+ if (hp->dxfer_direction == SG_DXFER_TO_FROM_DEV) {
+ static char cmd[TASK_COMM_LEN];
+ if (strcmp(current->comm, cmd) && printk_ratelimit()) {
printk(KERN_WARNING
"sg_write: data in/out %d/%d bytes for SCSI command 0x%x--"
"guessing data in;\n" KERN_WARNING " "
@@ -611,6 +612,9 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos)
old_hdr.reply_len - (int)SZ_SG_HEADER,
input_size, (unsigned int) cmnd[0],
current->comm);
+ strcpy(cmd, current->comm);
+ }
+ }
k = sg_common_write(sfp, srp, cmnd, sfp->timeout, blocking);
return (k < 0) ? k : count;
}