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scst_vdisk: Only execute commands with a data buffer asynchronously

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7925 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2019-02-13 06:20:26 +00:00
parent 81e904c750
commit b19c8f0428
1 changed files with 9 additions and 1 deletions
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10
scst/src/dev_handlers/scst_vdisk.c
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@@ -3241,7 +3241,15 @@ static bool do_fileio_async(const struct vdisk_cmd_params *p)
struct scst_device *dev = cmd->dev;
struct scst_vdisk_dev *virt_dev = dev->dh_priv;
return virt_dev->async && dev->dev_dif_mode == SCST_DIF_MODE_NONE;
if (!virt_dev->async || dev->dev_dif_mode != SCST_DIF_MODE_NONE)
return false;
switch (cmd->data_direction) {
case SCST_DATA_READ:
case SCST_DATA_WRITE:
return true;
default:
return false;
}
}
static bool vdisk_alloc_kvec(struct scst_cmd *cmd, struct vdisk_cmd_params *p)