[PATCH] libata: update ata_do_simple_cmd()
* the function has always returned AC_ERR_* masks not -errno but its
return type was int. Make return type unsigned int.
* don't print error message automatically. it's the caller's
responsibility.
* add header comment
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index bbd6665..4a44e75 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1131,14 +1131,23 @@
return err_mask;
}
-/*
- * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
- * without filling any other registers
+/**
+ * ata_do_simple_cmd - execute simple internal command
+ * @dev: Device to which the command is sent
+ * @cmd: Opcode to execute
+ *
+ * Execute a 'simple' command, that only consists of the opcode
+ * 'cmd' itself, without filling any other registers
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * Zero on success, AC_ERR_* mask on failure
*/
-static int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
+static unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
{
struct ata_taskfile tf;
- int err;
ata_tf_init(dev, &tf);
@@ -1146,12 +1155,7 @@
tf.flags |= ATA_TFLAG_DEVICE;
tf.protocol = ATA_PROT_NODATA;
- err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
- if (err)
- ata_dev_printk(dev, KERN_ERR, "%s: ata command failed: %d\n",
- __FUNCTION__, err);
-
- return err;
+ return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
}
/**
@@ -4971,6 +4975,7 @@
static int ata_flush_cache(struct ata_device *dev)
{
+ unsigned int err_mask;
u8 cmd;
if (!ata_try_flush_cache(dev))
@@ -4981,17 +4986,41 @@
else
cmd = ATA_CMD_FLUSH;
- return ata_do_simple_cmd(dev, cmd);
+ err_mask = ata_do_simple_cmd(dev, cmd);
+ if (err_mask) {
+ ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
+ return -EIO;
+ }
+
+ return 0;
}
static int ata_standby_drive(struct ata_device *dev)
{
- return ata_do_simple_cmd(dev, ATA_CMD_STANDBYNOW1);
+ unsigned int err_mask;
+
+ err_mask = ata_do_simple_cmd(dev, ATA_CMD_STANDBYNOW1);
+ if (err_mask) {
+ ata_dev_printk(dev, KERN_ERR, "failed to standby drive "
+ "(err_mask=0x%x)\n", err_mask);
+ return -EIO;
+ }
+
+ return 0;
}
static int ata_start_drive(struct ata_device *dev)
{
- return ata_do_simple_cmd(dev, ATA_CMD_IDLEIMMEDIATE);
+ unsigned int err_mask;
+
+ err_mask = ata_do_simple_cmd(dev, ATA_CMD_IDLEIMMEDIATE);
+ if (err_mask) {
+ ata_dev_printk(dev, KERN_ERR, "failed to start drive "
+ "(err_mask=0x%x)\n", err_mask);
+ return -EIO;
+ }
+
+ return 0;
}
/**