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[PATCH] cciss: bug fix for BIG_PASS_THRU 

Applications using CCISS_BIG_PASSTHRU complained that the data written
was zeros. The problem is that the buffer is being cleared after the
user copy, unless the user copy has failed... Correct that logic.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jens Axboe 2005-11-18 14:02:54 -08:00 committed by Greg Kroah-Hartman
parent 1023cf6f2f
commit 1a6e1022c1
1 changed files with 4 additions and 3 deletions
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7
drivers/block/cciss.c
View File

@ -1016,10 +1016,11 @@ static int cciss_ioctl(struct inode *inode, struct file *filep,
status = -ENOMEM;
goto cleanup1;
}
if (ioc->Request.Type.Direction == XFER_WRITE &&
copy_from_user(buff[sg_used], data_ptr, sz)) {
if (ioc->Request.Type.Direction == XFER_WRITE) {
if (copy_from_user(buff[sg_used], data_ptr, sz)) {
status = -ENOMEM;
goto cleanup1;
goto cleanup1;
}
} else {
memset(buff[sg_used], 0, sz);
}