libata: make it clear that sata_inic162x is experimental

commit bb9696192826a7d9279caf872e95b41bc26c7eff upstream.

sata_inic162x never reached a state where it's reliable enough for
production use and data corruption is a relatively common occurrence.
Make the driver generate warning about the issues and mark the Kconfig
option as experimental.

If the situation doesn't improve, we'd be better off making it depend
on CONFIG_BROKEN.  Let's wait for several cycles and see if the kernel
message draws any attention.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Martin Braure de Calignon <braurede@free.fr>
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Reported-by: risc4all@yahoo.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index a5a3ebcbdd2cf6295028f62d0fe1d3bb21397633..78eabff2fe46fe5839b02d0bc4d1a4f7767abc80 100644 (file)
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -107,7 +107,7 @@ config SATA_FSL
          If unsure, say N.
 
 config SATA_INIC162X
-       tristate "Initio 162x SATA support"
+       tristate "Initio 162x SATA support (Very Experimental)"
        depends on PCI
        help
          This option enables support for Initio 162x Serial ATA.

diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index 1e6827c89429d4bd79b422745d23faf6d8407d9f..74456fa8483fd8f699ed3c7b91bf6e6ec956d653 100644 (file)
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -6,6 +6,18 @@
  *
  * This file is released under GPL v2.
  *
+ * **** WARNING ****
+ *
+ * This driver never worked properly and unfortunately data corruption is
+ * relatively common.  There isn't anyone working on the driver and there's
+ * no support from the vendor.  Do not use this driver in any production
+ * environment.
+ *
+ * http://thread.gmane.org/gmane.linux.debian.devel.bugs.rc/378525/focus=54491
+ * https://bugzilla.kernel.org/show_bug.cgi?id=60565
+ *
+ * *****************
+ *
  * This controller is eccentric and easily locks up if something isn't
  * right.  Documentation is available at initio's website but it only
  * documents registers (not programming model).
@@ -807,6 +819,8 @@ static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
        ata_print_version_once(&pdev->dev, DRV_VERSION);
 
+       dev_alert(&pdev->dev, "inic162x support is broken with common data corruption issues and will be disabled by default, contact linux-ide@vger.kernel.org if in production use\n");
+
        /* alloc host */
        host = ata_host_alloc_pinfo(&pdev->dev, ppi, NR_PORTS);
        hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);