ata: ahci_imx: warn when disabling ahci link

When the AHCI link is disabled, it can't be re-enabled except by
resetting the entire SoC.  Rather than doing this silently print
some kernel messages to inform the user, along with how to avoid
this.

tj: Put a long printf format string on a single line.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index 4384a7d72133..cac4360f272a 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -326,6 +326,9 @@ static void ahci_imx_error_handler(struct ata_port *ap)
         writel(reg_val | IMX_P0PHYCR_TEST_PDDQ, mmio + IMX_P0PHYCR);
         imx_sata_disable(hpriv);
         imxpriv->no_device = true;
+
+        dev_info(ap->dev, "no device found, disabling link.\n");
+        dev_info(ap->dev, "pass " MODULE_PARAM_PREFIX ".hotplug=1 to enable hotplug\n");
 }
 
 static int ahci_imx_softreset(struct ata_link *link, unsigned int *class,