ata: libata: add missing ata_identify_page_supported() calls

ata_dev_config_ncq_prio() and ata_dev_config_devslp() both access pages
of the IDENTIFY DEVICE data log. Before calling ata_read_log_page(),
make sure to check for the existence of the IDENTIFY DEVICE data log and
of the log page accessed using ata_identify_page_supported(). This
avoids useless error messages from ata_read_log_page() and failures with
some LLDD scsi drivers using libsas.

Reported-by: Nikolay <knv418@gmail.com>
Cc: stable@kernel.org # 5.15
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Matthew Perkowski <mgperkow@gmail.com>

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index edaedcd..59ad8c9 100644 (file)
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2178,6 +2178,9 @@ static void ata_dev_config_ncq_prio(struct ata_device *dev)
        struct ata_port *ap = dev->link->ap;
        unsigned int err_mask;
 
+       if (!ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
+               return;
+
        err_mask = ata_read_log_page(dev,
                                     ATA_LOG_IDENTIFY_DEVICE,
                                     ATA_LOG_SATA_SETTINGS,
@@ -2454,7 +2457,8 @@ static void ata_dev_config_devslp(struct ata_device *dev)
         * Check device sleep capability. Get DevSlp timing variables
         * from SATA Settings page of Identify Device Data Log.
         */
-       if (!ata_id_has_devslp(dev->id))
+       if (!ata_id_has_devslp(dev->id) ||
+           !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
                return;
 
        err_mask = ata_read_log_page(dev,