[PATCH 44/71] ata: Don't try to use non-existent ports
Simon Glass
sjg at chromium.org
Wed Dec 7 09:51:10 CET 2022
The controller indicates the number of ports but also has a port map
which specifies which ports are actually valid. Make use of this to
avoid trying to send commands to an invalid port.
This avoids a crash on some controllers.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
drivers/ata/ahci.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index de6131f1d9b..272c48b8e57 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -675,6 +675,12 @@ static int ata_scsiop_inquiry(struct ahci_uc_priv *uc_priv,
/* Read id from sata */
port = pccb->target;
+ /* If this port number is not valid, give up */
+ if (!(uc_priv->port_map & (1 << port))) {
+ debug("Port %x not valid in map %x\n", port, uc_priv->port_map);
+ return -ENODEV;
+ }
+
if (ahci_device_data_io(uc_priv, port, (u8 *)&fis, sizeof(fis),
(u8 *)tmpid, ATA_ID_WORDS * 2, 0)) {
debug("scsi_ahci: SCSI inquiry command failure.\n");
--
2.39.0.rc0.267.gcb52ba06e7-goog
More information about the U-Boot-Custodians
mailing list